Hello Guest it is March 29, 2024, 11:01:16 AM

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Topics - simpson36

Pages: « 1 2 3 4 5 6 »
31
My new mill has a 90V servo motor for the spindle.  My current PS is linear 72V with dual rectifiers. The PS will be overloaded with the new spindle motor and the 4th axis motor, so I am contemplating buying a second PS and I am in something of a quandary of what to buy. The 90V motor runs OK on 72V, but does not achieve the speed I need.

I have axis motors running fine at higher (in one case double) than their rated voltages and I was looking for opinions on where to run a 90V spindle motor and what ramifications if any I would encounter running the motor at 130V

Also I see that dual rectifier PS can have the secondaries wired in series or in parallel for double volts of double amps. I am wondering in this case if it is possible to run one motor by taking the power in series and still be able take the regular voltage off the respective rectifiers. For example, can a dual rectifier 80V SP supply 160V for one motor and 80V for other motors by taking power from a series wiring for the HV and straight into each rectifier for the 80V?


32
Well, wonder of wonders, here is my first circuit design and prototype electronic thingy  ;D

With guidance from tech support at CNCdrive, I was able to figure out this circuit. This was created to take care of the weak error line signal from the CDCdrives products, but it will take even a very weak signal anywhere from about 3V to 15V and put out multiple strong 5V signals to drive a remote LED and even a stubborn BOB with hungry optoisolators.
This circuit solves, for example, a specific problem discussed here not long ago. A solution to noise causing false e-stops on limit switch or other e-stop lines is to increase the voltage to 12V, however, that creates the problem of interfacing that back to the 5V BOB. This circuit solves that problem. The 12V line from the limit switch goes into the Error Line pin and the 5V out goes to the BOB.

First I made a prototype with a Radio Shack proto board. Schematic has been added here - scroll down to chapter 5.5:
http://www.cncdrive.com/datasheets/Dugong_manual.pdf

This is the top and bottom of the first prototype:




After the circuit was tested and working, I went on to design and rout a custom PC board and put it all together. I have purchased the SMD version of the chip in case a wave of motivation overtakes me (unlikely any time soon).

Here is the routed PC board:  1/32" end mill 28K rpm and 1/16" endmill at 7K RPM.

And top and bottom views of the completed part. . . less IC chip. . and prior to cleaning up the rosin:










33

There is a very interesting read on the CNCforum that follows the development of this product. It is the 'swiss army knife' of servo drives, apparently.

People (including myself) have expressed an interest in reading a review, and I can find none so far on the web.

So I am considering doing a review of this, and in the initial research phase, I have found quite a bit of stuff, but not people usiing it with MACH3 so much. Nice to start with some feedback from users if possible. I'm also finding what seem to be rumors about the drive supporting two motors and there is one Youtube vdeo showind it drivng a stepper to 9,000 ROM. Yet these things are not documented officially.

I find that many product reviews are unreliable because the reviewers ask for 'loaners' thereby tipping off the vendor to the review. They get 'special' versions of the products and special treatment and access to tech support and development teams than no average customer would get. I buy the product, record my experience as I go thru the process, and then if I like it I keep it and if not, I try to return it. That's the only way to really know what to expect from the vendor and the product.

Has anyone been using thses drives with Mach3 successfully?


34

I would like  to add this product to my review, but I am getting nowhere with the initial research as I can find zip, nada  . . . zero on anyone using these products at all.

Their web site is relatively new, I think. They have a new presence on Ebay, but no sales of the complete system yet.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=160350909100&ssPageName=STRK:MEWAX:IT

the ebay link will eventually expire, so here is the comapny web site:

http://www.dmm-tech.com/


It seems like a no-brainer to snatch these things up, so I'm wondering why these things aren't all over the place.

Does anyone know anything about this setup?

35

'Living document' will be revised and expanded occationally but link will remain the same, so just hit it again for lastest updates.

This is only a documentation of my experiences with the products and is not an endorsment or 'buying giude'.  Comments welcome.

http://www.thecubestudio.com/ServoDriveReview.htm



36

Message similar to subject line every time I try to click soft limits on.  >:(  Been this way for a while so I don't remeber exactly when it started or what I might have changed just prior.

Homing works fine, all limit switches funtioning, machine is well within the homing/limits settings, with no limit switches triggered.

I tried disabling one axis at a time and then disabled all of them together . . .  same error  ???

Same error with Gcode loded or with no program loaded. Machine is running fine.

So it is not something glaringly obvious. Got me stumped . . . prolly something simple I am overlooking.  :-[



37
Feature Requests / Full featured Serial Communications
« on: June 29, 2009, 03:35:28 PM »

I have been looking at a bunch of different servo drives recently and it seems most like to talk thru a serial port.

Mach has a simple function to dump some characters out a standard serial port and also a very 'bare metal' method of talking byte by byte to a non standard port.

There may well be more stuff available within Mach that is not documented, or that I just have not found yet, but a bi-directional communucation structure would allow clever script writers to utilize the monitoring/reporting/control capabilities that most of these newer drives seem to have, and take a big step toward a true closed loop system for Mach.. 


38
General Mach Discussion / Anybody using Rutex servo drives?
« on: June 25, 2009, 07:38:26 AM »
Curious about the performance of Rutex servo drive and particularly these new ones:

http://www.rutex.com/us/index.php?productID=123

39
General Mach Discussion / Has anyone used Viper Servo drivers?
« on: June 03, 2009, 03:24:54 PM »
Being unhappy with the Gecko 340, I did some reasearch and came up with this:

http://www.viperservo.com/Sales.htm

If it does all they claim, it will not have the limitations of the Gecko.

Just wondering if anyone is using this product and can render and opinion of it.


40
My setup is sensitive to any noise so my solution was simply to eliminate the wireless interference makers including Xbox controller, network and keyboard. I also completely reworked the grounding of eveything in the setup.

My control box with a CNC4PC BOB and 4 Gecko Drives is aluminum and hangs on the wall behind and off to the side of the mill. I have a clear plastic cover on the box so that I can observe the many indicator lights on the devices inside. I suspect the polycarbonate plastic is useless as shielding.

Is there any way to shield while still being able to see the internals? I was thinking a metal screen like aluminum window screening might provide some shielding and I could probably see thru that well enought to see the fault indicators, etc.

Another though I had was the sunscreen film for windows. I recall reading that this material is a metal coating on mylar or something like that. If that is a metallic coating, then perhaps that would provide shielding.

Any thoughts on this?

Pages: « 1 2 3 4 5 6 »