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Messages - bw

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General Mach Discussion / Re: Mach 3 and a Roland PNC-2700
« on: September 23, 2011, 04:41:38 PM »
I also own one of the 3100 machines.  I use Vetric Vcarve, it has a post proccessor for the Roland machines.

General Mach Discussion / Re: Tool radius compensation
« on: August 10, 2011, 09:30:11 PM »
I will look into that. 

General Mach Discussion / Re: Tool radius compensation
« on: August 10, 2011, 08:58:26 PM »
It’s a tooling issue, that was just an example but it’s a special made tool I use all the time and when I resharpen it, of course the diameter changes ever so slightly.  It would be easy if I could just change the values in the tool table in mach but they don’t do anything when I do.  Not sure how to set it up so I can do it that way.

It's a long program so changing that one setting would save a lot of time and tweeks to the code.

General Mach Discussion / Tool radius compensation
« on: August 10, 2011, 06:35:43 PM »
Say I am interpolating a hole that should be 1 inch diameter.  When it is done the diameter is .999 what would be the best way to compensate for the difference?  I have tried several things but short of changing it in my cam program I am not having much luck.


General Mach Discussion / Re: Servo sizing help
« on: March 20, 2011, 09:14:02 AM »
You are correct Hood,
It is a closed loop brushed dc servo system.  If I could use the stepper I would not be having this problem. 

General Mach Discussion / Re: Servo sizing help
« on: March 20, 2011, 07:09:07 AM »
The indexer takes nothing at all to move without the motor on it, I can take the minute degree wheel connected to the worm drive and just touch it with my finger and get movement. I will also confess to not bring able to wrap my head around the power rpm calculations for the servos powers and speed.  Many of the servos I see have a max voltage of 90 VDC, many also are 24VDC, if I hook up the 117 to it I can’t see how it won’t burn it up, or do I need to reduce or add another power supply to create the proper RPM’s?

I should have also said that it originally came with a stepper motor.  A Slo-Syn M092-FD09, I was able to find some info on it.
This is all that’s on the motor.
2.5 VDC
4.8 Amps
200 steps /rev

I found this info doing a search on the motor.
Max holding torque
(Unipolar) 300 oz-in 
(Bipolar) 370 oz-in
(Rotor inertia) 0.0174 oz-in

It also had
Minimum holding torque
2 on 300 oz
1 on 180 oz

I am usually pretty good at picking up on things like this but I am having a heck of a time because I don’t full understand it all.

General Mach Discussion / Servo sizing help
« on: March 19, 2011, 09:19:39 PM »
I am wondering if someone might be able to help sizing a servo motor. 

I am hooking up a 4th axis using and older Haas 5c indexer.  I am running the Ajax cnc setup for Mach and need to use a brushed DC servo.
I have 117 VDC in the cabinet already but can add another power source if necessary.

The indexer takes 72 revolutions of the drive shaft to go 360 degrees
I already have a 5:1 gearbox and can use either nema 23 or 34 frame or just make my own to fit if needed.
What I don’t know is what size motor or RPM I need to get the proper torque and speed?

Any help would be appreciated.

General Mach Discussion / Re: Anyone using the Ajax control system
« on: January 17, 2011, 06:10:10 PM »
I installed the DC3IO kit running Mach a few months back.  As stated customer support is non existent besides their forum.  With that being said, most of my install problems were not that bad and most of them were from not understanding the instructions completely or just doing something stupid.  I had it up and running within a week and fine tuned it within 2 weeks.  I have been using it almost daily in production with no issues.

I think it is a well built unit however the heads in charge really need to get one set of instructions (as there are many and they are different) and at least give a few minutes of phone support to new buyers.  I couldn’t get them to answer or return any calls once the purchase was made and I found that insulting as well as a horrible customer service policy.  I will say almost all the answers I needed were on the forum if I searched around enough.

Bottom line is, I like the system but not the way they run the business.  If I treated my customers like that I would be living in a cardboard box.

I just got done doing a retrofit on an old crusader M.  I went with the ajax setup and mach, and have to say I am very pleased with it.  While mach may not be the best of the best, I found it very easy to get the hang of and I was making chips again in no time.  Ajax install support is poor but the system itself is good. The prices on the old stuff was just getting to out of hand to continue putting money into it.  If anybody is looking for M parts I have a full working system as well as a brand new Z encoder, and I wouldn't want the insane prices people are asking.  I would rather see them go to someone who can use them and recoup a little of the retro cost.

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