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Mach Discussion => General Mach Discussion => Topic started by: flhr97 on August 05, 2008, 10:34:49 AM

Title: Omron drives and motors?
Post by: flhr97 on August 05, 2008, 10:34:49 AM
I've been running my little taig mill with Mach3 and enjoying it very much, but I recently wanted something just a bit bigger for woodworking projects.  I bought this http://i50.photobucket.com/albums/f348/father_torque/2b0b_3.jpg  and I'm in the process of figuring out how to get it running.

The motors and drives are all Omron.  They have a 400w motor on the x axis, 200 and 50 on the y and z.  They are all 200V 3p drives.  I spoke with the techs at Omron and they said that I could run the drives with regular household 208v, by running the 2 phases to two of the drives inputs and jumpering one of them to the third input.  He said this would satisfy the internal voltage checks and allow the drive and motor to run albeit at 1/3 less power.  Considering the size of the drives and motors and that I'm not going to be cutting metal with this I dont' see that as a problem.

My question is how do I go about interfacing between my PC and the Omron drives?  I've read around enough to know I need some sort of breakout board, but I haven't seen an Omron specific one.  I'm hoping that there isn't something different about the Omrons that would preclude me from running them in this fashion.  I'd really like to use the existing motors and drives since everything is installed, wired up, and ready to go. 

Any and all help would be greatly appreciated.  In the event that you need them the motor model #s are U20030HA x axis, U40030HA-B y axis, U05030HA-B z axis.  The drive #'s are R88D-UA12HA x axis, R88D-UA08HA y axis, and R88D-UA03HA z axis. 

Regards,

Bob Sharp
Title: Re: Omron drives and motors?
Post by: Hood on August 05, 2008, 10:45:11 AM
It will all depend on whether the drives can accept Step Direction, a lot of Omrons do so if that is the case then it should be possible without too much hassle, you will have to re route wires etc and if you had wiring diags it would be much easier.
 Just away to have a search and see if I can find a manual for your drives.
Hood
Title: Re: Omron drives and motors?
Post by: flhr97 on August 05, 2008, 11:00:08 AM
Hood I found this if it helps. http://www.avtomatika.org/docs/7/30.pdf
Title: Re: Omron drives and motors?
Post by: Hood on August 05, 2008, 11:02:44 AM
Just found some info and yes they can accept Step/Dir or as Omron call it Feed Pulse and Direction.
 Should be a fairl;y easy retrofit :)
 You might want to look at the smoothstepper as it will allow you to use the speed of the AC Servos without having to resort to electronic gearing in the drives. Any of the breakout boards will work for you, I personally like the PMDX122 but there are a lot of other good ones to choose from.

Hood
Title: Re: Omron drives and motors?
Post by: Hood on August 05, 2008, 11:03:56 AM
ah see you posted as I was typing, will look see what your link says :)

Hood
Title: Re: Omron drives and motors?
Post by: Hood on August 05, 2008, 11:19:04 AM
Maybe I spoke too soon, see mention of models within the range and look like yours are analogue input, will do some more reading in between loading the lathe :)

Hood
Title: Re: Omron drives and motors?
Post by: Hood on August 05, 2008, 11:32:42 AM
Looks like yours are Analogue input, thats not so good :(
There are a few recent products that can be used but how good they are I dont know, the ones I know of are
DSPMC/IP Motion Controller from http://www.vitalsystem.com/

K Motion controller from http://www.dynomotion.com/

DMC Series from Galil   www.galilmc.com/


Hood
Title: Re: Omron drives and motors?
Post by: flhr97 on August 05, 2008, 11:35:10 AM
Hmmmm, would I be better off selling these motors and drives and getting ones that would accept step inputs?
Title: Re: Omron drives and motors?
Post by: Hood on August 05, 2008, 01:49:08 PM
Will have a read throughthe docs later on and see for sure but you may be able to get a pulse to analogue converter from Omron, I seem to remember seeing that somewhere.
 If you cant get that then possibly you can get the Omron drives that will accept Step/Dir and sell your Analogue ones, might not be worthwhile dependant on what the market for the secondhand drives are. Might be worth asking Omron if they do part exchange though as quite a few drive manufacturers will.

Later

Hood
Title: Re: Omron drives and motors?
Post by: flhr97 on August 05, 2008, 05:25:50 PM
Well the news isn't getting any better.  Omron techs say they know nothing about an analog to digital converter.  Omron doesn't manufacture either drive anymore, in fact they never did, they bought these from yaskawa and rebranded them, so no return program. 

I can find the ones I need on ebay for around 600.00 dollars a piece, ouch!  Didn't even mention THAT scenario to my wife. ;)  I checked with PlcCenter Surplus Industrial about selling them my old ones and buying the ones I needed from them.  They GRACIOUSLY offered me 72.00 dollars for all three of mine and wanting the aforementioned 600.00 EACH for theirs.  I talked to Gecko today and none of their drives will run the 200v motors I have. 

I'm debating just pulling the motors and the drives and selling all of them and going back with all different equipment.  That just irks me knowing that I have everything here and it's all matched to the gantry and to each other.  I keep thinking there has to be some sort of way to make this thing work.  Any ideas no matter how crazy are certainly welcome at this point.
Title: Re: Omron drives and motors?
Post by: Hood on August 05, 2008, 05:43:05 PM
The manual is a bit of a pain but seems like your motors are AC Servos  200v with incrmental encoders  so if thats the case then you should be able to get other industrial type drives for them. As you have already mentioned that they are actually Yaskawas have a look on eBay and see if you can find any.

Wouldnt even consider dealing with PLC Center, I often have a look around USA eBay at servo drives and I just laugh at the prices they are looking for.

You could use some of the options I mentioned above, there is a section on this forum for the Galil and also the VitalSystems so check them out.

Hood
Title: Re: Omron drives and motors?
Post by: comet on August 06, 2008, 02:11:39 PM
Hi,
 if its a cheap servo retro fit you want then use electric DC scooter motors,with cheap heds quad encoders screwed
to them,and the excelent Gecho G340 drives.
  No doubt there will be peaple who say it wont be any good,but I have built three milling machines using this method and each machine has worked perfectly.
   
Title: Re: Omron drives and motors?
Post by: flhr97 on August 06, 2008, 02:28:23 PM
Interesting idea.  If things don't work out I might talk to you about it further.  I found this link last night, http://homanndesigns.com/store/index.php?main_page=product_info&cPath=1&products_id=21  That board is supposed to do what I am looking for and at 30 bucks per servo drive that's a nice cheap fix if it works.  I emailed them this morning but don't expect to get a reply till sometime late tonight.

I'll let you all know what I find out.
Title: Re: Omron drives and motors?
Post by: comet on August 06, 2008, 02:48:04 PM
Hi,
   sorry but thats not what you need! what that does is interface the main spindle motor (cutting head) to the computer.

Title: Re: Omron drives and motors?
Post by: Hood on August 06, 2008, 02:48:58 PM
Think the DigiSpeed is for spindle control only, dont think it will have close enough control of the voltage for an axis. :(
CNC Teknix sell Tek10 drives and the top part of the drive has analogue output from Step/Dir. I sort of tried it a while back, I put encoder pulses in  and watched the voltage out and it certainly acted properly as if it was seeing the motor turning without Mach telling it to move and trying to correct it. I came upon step/dir drives that were suitable before I could get it all hooked up properly so didnt test any further.
 I heard that Teknix were thinking of producing a converter board but dont know if it was true and if they have done so if it was. Might be worth emailing them, they may even sell the top board from the Tek10 drives seperately.
 I have a couple of the top boards here (Scotland) and could loan you one to test if you pay for the shipping. I would need it back though as I may have a use for it in a future project.
Hood

Hood
Title: Re: Omron drives and motors?
Post by: flhr97 on August 06, 2008, 03:00:57 PM
I should have known that was too inexpensive to be right.  I did talk to somebody else just a short while ago.  The man at Rutex said that this setup would do exactly what I wanted.  http://www.rutex.com/aus/index.php  I need pretty much exactly what you see in the picture, the three converter boards and the motherboard/breakout board.  The boards run 98.00 dollars U.S. apiece which is a bit more than I wanted to pay, but if it does what they say it does it will be more than worth it.

Is anyone familiar with them or with their products?

Title: Re: Omron drives and motors?
Post by: Hood on August 06, 2008, 04:20:31 PM
Not heard anything about them at all and dont know of anyone who has them. Ask Rutex if they can put you in touch with users.

Hood
Title: Re: Omron drives and motors?
Post by: comet on August 06, 2008, 05:28:41 PM
I would ask them for a sugested wiring diagram,buy one and try it,probably your only option.
If it works you will save a lot of money,if not you just put it up on ebay and sell it on.
Title: Re: Omron drives and motors?
Post by: DaveDoesIT on August 06, 2008, 08:39:01 PM
I'm debating just pulling the motors and the drives and selling all of them and going back with all different equipment.

Can't help with the drivers but I can help with the philosophy. [grin] I suggest you take some time, like a week or two before the "pull it all out" thing. As you say, you have something that might work as it is. The voice of experience here.

Dave
Title: Re: Omron drives and motors?
Post by: flhr97 on August 06, 2008, 09:44:40 PM
I tend to agree with you, I'm hoping to avoid the rip it out option if at all possible. 

I've done a bunch of looking around this evening and I could buy all 3 of the same servo drives I have except they are step input instead of analog for around 600.00 total on Ebay.  This would be a direct swap out without having to change wiring or anything.  I could then sell the drives I have now to recoup some of that expense. 

The other option is to buy the boards from Rutex and wire them in between my PC and the drives I have now.  That puts me out over 300.00 with nothing to sell.  Also it adds another layer of complexity to this system, something else to go wrong, as it were.   I liked the idea Hood had with the Dynomotion board, but it doesn't work with Mach3.

The first option is the one I'm leaning towards at the moment, it's the easiest, and depending on how much I could sell my drives for, could be the cheapest.  I'm not going to make a concrete decision till next week though.  I'm still waiting to get this thing to my house.  It's still on a truck somewhere driving across the U.S.    I just garnered all the information on the drives and the motors from the gent I bought it from before it was picked up. 

Title: Re: Omron drives and motors?
Post by: Hood on August 07, 2008, 02:58:09 AM
From what I understand the Dynomotion does work with Mach, I am sure there is a plugin on their site.
  However if you can get the 3 drives for $600 and have the old ones to sell then that is the option I would go for and for the exact reasons you have mentioned.

Hood
Title: Re: Omron drives and motors?
Post by: comet on August 07, 2008, 06:56:49 AM
Although ripping out your existing system and replacing it is not your
cheapest option,it does make your machine future proof,and you will know
it inside out.There is a lot to be said for that especialy if your intending
to do production work.You will always be able to get a replacement Gecho in a couple of days.
you might be throwing away money if you have to replace one of those omrons.
Whatever the suggestion that you sit back and consider all options before deciding is probably wise!
Title: Re: Omron drives and motors?
Post by: Hood on August 07, 2008, 07:13:18 AM
Afraid in my opinion, and it is only my opinion ;) . but Geckos with DC servos would be a downgrade as far as I am concerned. I am not saying anything bad about the Geckos or DC servos, they are great especially at the price they are. You however have much better motors already and the cost of getting suitable drives will probably work out less than getting new motors and Geckos. In addition to that the configurability and features of your drives will be much much more than the Geckos.
 Swapping out motors will also probably mean motor mounts, different pulleys etc etc. so a lot more work.

 You can also do what I am doing as far as future proofing is concerned, keep your eye out on eBay and pick up spare drives and motors etc when they are cheap. If you are desperate for drives the only ones on eBay are expensive, when you dont need them then the cheap ones appear, think its called Sods Law :D

Hood
Title: Re: Omron drives and motors?
Post by: flhr97 on August 07, 2008, 08:08:25 AM
I"m going to call Dynomotion today and talk to them.  I was just going by what I saw on their website and the FAQ states that it doesn't work with Mach3.  I do like the look, price and compactness of the Kmotion.

Comet's point about future availability is a good one to consider.  I do plan on using this machine for some production work, so that is something I will have to think about while deciding how best to proceed. 
Title: Re: Omron drives and motors?
Post by: Hood on August 07, 2008, 08:38:02 AM
I"m going to call Dynomotion today and talk to them.  I was just going by what I saw on their website and the FAQ states that it doesn't work with Mach3.  I do like the look, price and compactness of the Kmotion.

Look here, a bit down the page it says it comes with Mach3 PlugIn.  http://dynomotion.com/Software/Download.html
 A member here says he has them and I think may be an agent for them in the UK, might be worth asking him, heres his profile. http://www.machsupport.com/forum/index.php?action=profile;u=58

Hood
Title: Re: Omron drives and motors?
Post by: flhr97 on August 07, 2008, 08:48:32 AM
Good catch Hood, they must have forgotten to update their FAQ page.  I'll try and chat with the guy you mentioned and see what he says.  I have a few hours to wait till Dynomotion opens up for business.  If it would work with mach3 and the motors I have this would probably be my best option since it makes future repairs easy and I can still sell the drives I have to offset the cost.
Title: Re: Omron drives and motors?
Post by: Hood on August 07, 2008, 09:15:08 AM
I was under the impression you still needed to keep your drives but thats just from my understanding of the posts I saw da21 make. Will have to go look at them again as it was a while back.
Hood
Title: Re: Omron drives and motors?
Post by: Hood on August 07, 2008, 09:33:13 AM
From what I have seen you can either use the Kmotion and your analogue drives or use the Kmotion and add a snapamp for each axis. The latter is getting expensive as you would need the Kmotion at $600 and 3  SapAmps at $400 each.
 Would be better getting the Omron drives for $600 if thats the case.

Hood
Title: Re: Omron drives and motors?
Post by: flhr97 on August 07, 2008, 01:08:03 PM
I talked to the gentleman at Dynomotion today.  The Kmotion won't drive the motors even with the snapamp, according to him.  They don't put out enough voltage to drive the 200V motors.  The Kmotion would work as digital to analog converter if I bought one and placed it between the PC and the Omron drives.  At 600.00 though, that's a pricey fix. 

So I'm back to looking at replacing the Omron drives, although now Comet has gotten me to thinking about what I do in the event of hardware failure.  Replacing all the motors and drives and selling what I have is starting to sound more and more feasible to me.  Surely I could find motors with the same frame as the ones I have, which would make the changeover that much easier. 

It's an interesting dilemma and one that is certainly going to take some more research.   
Title: Re: Omron drives and motors?
Post by: Hood on August 07, 2008, 01:37:20 PM
Think carefully before you get rid of the AC servos and drives. These drives are way more powerfull than Geckos with the features they will have. I have not studied the manual for their I/O capabilities but I would imagine they would be on a par with the Giddings and Lewis drives I use.
 I mentioned it before but maybe you didnt see it or dont want to risk it or..........      but if you want I can send you out one of the Tek10 top boards to try out and see if they can be used correctly for digital to analogue conversion.
 

Hood
Title: Re: Omron drives and motors?
Post by: comet on August 07, 2008, 03:56:41 PM
Have a look at this:
http://ivan.blogs.chimerical.com.au/post/2008/05/02/Now-Im-counting-every-minute2c-Every-single-minute.aspx

It shows you one way of mounting a cheap (US digital) encoder on the back of a dc motor.
Hood is right there might be belts pulleys,adapter plates that you have to make, are you able to make them,
or have them made?
  As far as the Gecho drives are concerned they will run 80 volt@ 10 amp (peak 20 amp) thats up to 800 watts continuous,
they will more than suffice for your power requirements.
  Yes, the Gecho is a very simple entry level servo drive,but they work very well and are extreamly reliable in operation.
There are a lot of bridgeport sized mills around the globe powered by them,working to far greater accuracy than a wood router.
  Do you know and understand the advantages that the omrons,in terms of sophistication, have over the gecho?
And if you do will it make any differance to your machine?
  Starting from scratch as you are will enable you to match your leadscrew gearing to your motor RPM to your encoder count,
that way you will remove a lot of the problems associated with this type of set up.
   Plus alot of the guys on this forum use Gecho's so you will never be with out help setting them up.

Title: Re: Omron drives and motors?
Post by: flhr97 on August 18, 2008, 09:49:38 PM
Well, I have bad news and good news about the new mill.  It arrived last week and I've been spending all my time disassembling it to get it into my basement and then reassembling it down there.

The bad news is that the trucking company managed to bang my little z axis motor and ruined it, the output shaft is now at a 45 degree angle.  However that was the worst of it and nothing else was hurt.

The good news is much, much, better. 

The system arrived with 2 extra servo motors.  A U20030HA and a U2003OH, both seem to work perfectly.  It also came with a complete and functional Omron PLC.  Motherboard, I/O modules, high speed counter, and hand held programmers.  But best of all, inside the electrical cabinet I found 3 Omron servo drives, 2 R88D-UPO8HA's and a single R88D-UPO2HA.  These are the digital input servo drives that I was needing and lo and behold there they are laying in the cabinet.  I haven't wired them up to check them out yet, but everything else on it has worked so far. 

My question is now:  Do I need a breakout board to interface these drives with my PC running Mach3, or can one wire them up directly with the proper schematic?  If it's the latter where would one find the proper schematic?

Also all the axes are directly coupled, there is no gear reduction at all.  Is this going to be a problem? 

I've attached a few photographs so you can see what I'm dealing with. 

(http://i50.photobucket.com/albums/f348/father_torque/DSCN0857.jpg)
(http://i50.photobucket.com/albums/f348/father_torque/DSCN0858.jpg)
(http://i50.photobucket.com/albums/f348/father_torque/DSCN0868.jpg)
Title: Re: Omron drives and motors?
Post by: alfaalfa on August 19, 2008, 04:22:55 AM
Hello.

UA type of Omron/Yaskawa AC servodrives can take in only analog signal for speed or torque. Another type of this Sigma I series has a step/direction input too and all Sigma II servodives can do it.
I have used DSPmc to control Omron servo's and this combination works fine. The machine has been in production several hudred hours without problems.
With AC servo's and DSPmc you can get very good dynamics in your movements. The main limitation you'll have is the Y-movement made without slave servo on the right side.
Your application does not need pulleys with AC servo's.

If you however decide to sell those servo's/drives/cables - I can offer you 100 per each.

BR. Arto

Title: Re: Omron drives and motors?
Post by: Hood on August 19, 2008, 04:55:18 AM
Excellent news that you have the UP drives, lets hope they are working, I am sure they will be.
 A breakout will not be 100% needed but I reccommend you use one, any of the breakouts will do, I like the PMDX 122 but there are lots of others.
 You may find that your drives I/O is 24v, this is a good thing as its less prone to noise but you will need to convert that to 5v for any connections to Mach. I use relays to do that.

Hood
Title: Re: Omron drives and motors?
Post by: flhr97 on August 21, 2008, 10:20:21 AM
Just an update today.  I've been talking with different manufacturers trying to figure out what would work best with the equipment I have.  They had concerns that these drives didn't accept step and direction inputs that they were CW and CCW input. 

I talked to the drive manufacturer today and they gave me a link to the full manual for these drives.  Here it is if anyone would like to save it for possible future use.  http://www.omron247.com/doc/pdfcatal.nsf/4BF4A623ECEAF58B8525683F0072E704/$FILE/I502-e3-1.pdf   It shows that these drives can take a few different kinds of inputs depending on how the parameters are set, and yes, step and direction is one of them.

Also these drives accept either 24 or 5 volts for input which is quite nice.  Now I'm just debating on which hardware would be better.  candcnc.com has a nice package that might possibly work which includes handheld controller.  Pete at cncteknix is helping me figure out if his equipment will work, I like the fact that they have things that plug into USB instead of printer port.  And I'm talking to the people about the PMX board.  Hopefully I can get something on order soon.  In the meantime I'm gutting the electrical cabinet on this thing to see what I'll have to sell on ebay. 
Title: Re: Omron drives and motors?
Post by: Hood on August 21, 2008, 11:06:41 AM
That is good news, these Omron drives will be much better than Geckos or whatever. I am not saying anything bad about the Geckos as they are excellent for the price. The Omron drives are probably 5 or maybe 10 times the price of Geckos and they should have lots of options the Geckos wont have, add to that the AC servos and you should be a very happy guy :)

 I would go for the 24v I/O a bit more of a pain to set up but a lot less prone to noise, you probably have a transformer for 24V in your machines elec cabinet already so just need some relays to drop down to 5v for Mach. I have made a wee board that has 7 relays on it and I can use them all as individuals or have so many of them configured so they can be used for limits  and if one trips thye signal is cut, this lets you connect to Mach with only one input.

 Hood
Title: Re: Omron drives and motors?
Post by: flhr97 on August 21, 2008, 11:23:36 AM
That sounds interesting Hood, would you happen to have a schematic?
Title: Re: Omron drives and motors?
Post by: Hood on August 21, 2008, 01:57:48 PM
Heres a pic of it, you can see the jumpers at the left hand side, you can put them one way and it will join the contacts of the relays all together and if you have your inputs 5v and 0v at each end of the terminal block then any of the limit switches tripping will cause a fault. Alternatively you can have the jumpers the other way and it will mean each individual relay is treated as an individual. Finally you can connect so many together and have the rest seperates.
 I etched these boards but have since cut one out with a 90 degree spotting drill and it came out fine as well and probably less hassle. See second pic.
 I was supposed to bring the code home with me to give to another member tonight but I forgot, wish I had seen your reply earlier as that would have reminded me LOL I should have it on this computer but finding it may be another question LOL

Hood
Title: Re: Omron drives and motors?
Post by: flhr97 on September 08, 2008, 07:51:52 AM
Hood, if you have a minute I'd appreciate a second opinion.  I've been working on mechanical changes that needed to be made and now I've gotten to the wiring. 

I bought the pmx-122 board you recommended to interface this system and am ready to wire it up.  Here's the full manual on these servos.  http://www.omron247.com/doc/pdfcatal.nsf/4BF4A623ECEAF58B8525683F0072E704/$FILE/I502-e3-1.pdf
I changed the parameter in them to allow step/direction control and need to confirm which wires to hoook up.  The way I read it, I think I would wire pins 3 and 4 for step and direction but am not 100% sure.  I would like to get your input.


Regards.
Title: Re: Omron drives and motors?
Post by: Hood on September 08, 2008, 08:31:51 AM
Just had a quick look and I would think its pins 1 and 3 you want to use ie Pin 1 as Feed Pulse (step) and Pin 3  as Direction. I am not sure if the drive requires differential signal input and I will read later on but usually they can accept single input as well as differential.
 Got to get back to work and will read fully this evening.
Hood
Title: Re: Omron drives and motors?
Post by: Hood on September 08, 2008, 02:37:43 PM
Dont see anything so far that says you MUST use differential inputs so you may be ok with just pin 1 as your Step and Pin 3 as your direction, if it doesnt work then you will need to get line drivers  and have pins 1 and 2 as Step + and Step- and Pins 3 and 4 as Dir+ and Dir-.
Hood
Title: Re: Omron drives and motors?
Post by: flhr97 on September 18, 2008, 09:27:30 PM
My friend I keep chasing my tail with this thing and getting no where.  I've wired it every way possible, but it doesn't make any sense at all.

If I wire the direction sig to pin 1 and the step sig to pin 2 then I get clockwise motor rotation when I hit the Jog + button in Mach3
If I wire the direction sig to pin 2 and the step sig to pin 1 then I get clockwise motor rotation but it's on the Jog - button in Mach3.

I've tried every possible configuration of wiring step and direction to pins 1,2,3, and 4 and those two above configurations are the ONLY way I get any axis movement and it's always the same direction.

I have the 3,4, and 5 parameters in CN-02 turned off, which is supposed to enable step direction inputs. 

Please tell me I'm missing something simple.  At this point in time, looking like an idiot for overlooking something simple is much preferred over this frustration.

Perhaps it's what you mentioned in your last post about needing line drivers?  If it is I think I'll need a bit of an explanation about them.

Regards,

Bob
Title: Re: Omron drives and motors?
Post by: Hood on September 19, 2008, 02:17:23 AM
As I said previously from looking at the manual it is pins 1 and 3 if you are using single ended inputs. Maybe you need to increase the pulse width, try again with 1 and 3 connected but with a pulse width of 6. Also try changing the active state of the Step pin.
 If that doesnt work then yes it could be that you need differential inputs, US Digital sell differential line drivers. They are meant to give differential signals from their single ended encoders but I see no reason why they wont work for  your application. They are fairly innexpensive http://www.usdigital.com/products/interfaces/encoder/cable-drivers/ea/
Hood
Title: Re: Omron drives and motors?
Post by: alfaalfa on October 17, 2008, 03:27:58 AM
Hi.

Maybe you have already solved out your problem and I'm late with my reply but anyhow...

In Omron the inputs have optocouplers with 220 ohm resistor in series. So your positive pulse goes to pin 1 if pin 2 is grounded and your positive direction pulse goes to pin 3 if 4 is grounded. If you use negative pulses - this can be reversed.
Minimum pulse width is 2,5 us and between pulses there must be 5 us. Ie. the max is 200 kHz. It's not needed to slow down pulsing in Mach.

Parameters CN-01 bit F must be 0 and CN-02 bits 3,4,5 must be 0,0,0

After major setup changes with Omron driver you need to trip power to make changes effective.

With Mach I have controlled Omron only through DSPmc/IP (Vital Systems) controller but I have used Omrons much in positioning with pulse position inputs. It's very reliable device!

Hope you are progressing fine!

Terveisin!
Arto
Title: Re: Omron drives and motors?
Post by: flhr97 on October 19, 2008, 03:41:29 PM
I'm thankful for any and all input.  I did get it running exactly as you described.  I had tried putting step/dir on 1,3 and grounding 2,4 but I never could get it to work correctly like that for some reason.  Another person told me to try inverting the pulses and ground 1,3 and step/dir 2,4 and it works perfectly like that.

However I do have a new problem that perhaps you could shed some light on.  I keep getting A70 faults when I move an axis more than say 10 inches or so.  I've talked to Omron tech support but they aren't much help.  I've tried the autotuning but it seems like it stops prematurely.  A70 is the over torque alarm.  It ran the axes fine when it was still running through the PC so I'm sure it's not a mechanical problem.  All my torque settings are maxed out, I'm not sure what else could be causing it.   I'm wondering if there is something else that I should have wired into CN1 other than the step/dir wires? 

You wouldn't happen to have all the parameter settings that you used readily available would you?

Thanks much,

Bob
Title: Re: Omron drives and motors?
Post by: alfaalfa on October 19, 2008, 06:14:10 PM
OK. Let's try..

A70 means you have ca. 300% of the nominal motor torque. If this happens after slow motion (?) of ca 250 mm you must load the motor far too much.
What's the power of the servo you are adjusting?

1. If your motor in unpowered - can you turn it by hand with your mechanics attached? If the motor is something less than 750W you should be able to turn the axis pretty easily. Please check the full movement by hand to see possible misalignment problems.

2. Is you motor having electromechanic brake? You are sure it's off while the system is powered up?

3. You said 'running through PC'. Is this meaning you have adjusted the servopack with Omron's PC software and it runs fine with it?? If so then you need to tweak (lower) acceleration settings (motor tuning) in Mach.

4. If you follow Omron manual to adjust the servopack - you can quite easily do this by hand too. Autotuning in these Sigma I servo's is rather limited and won't suite for all possible loads. Try to return to factory settings in the SigmaWIN software, change the Pulse/Dir signal settings and start again sevo PID adjustment. When this is fine in SigmaWIN - go to Mach and set the acceleration and max speed correctly.

I can send you my setting values but I'm pretty sure they are not much of help as the mechanical setting can be really different..

BR. Arto