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Messages - Kemlin

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1
I turned the error count up to the highest setting and went through all of the different gain settings but ran into awful oscillation when trying to tune.  I went back to the settings as the amount of amps used stayed approximately the same however the actual speed of the table had increased.  Still at a loss but I am going to keep toiling with it to try to figure out why.  I am going to try to get my O-scope hooked up to see if I can get a waveform pattern out of the drive and figure it out from there.  Thanks for all of the help and if there are other pointers you can give me please do so.

2
Not that it will help much but I went back to setup the fluke and realized I need to get my amp clamp in the same building, so testing for that right now is out but I will get it done.  I did wire the reset wire direct (+5V to the err/res) and ran the same program without issue.  I went over the wiring on the BOB and the 320X to see how I had that setup as it's been a while since that was originally done and found the following:
From the BOB I have 3 wires that interact with the 320 which are step direction and common
I have + and - coming from the power supply to the 320
I have encoder + - A & B from the encoder
I have the armature + and - going from the 320 to the servo

I will get what I need to test for amperage and see what is going on there.  With the ERR/RES pin hotwired as it were with this last run, does that help diagnose anything or just put me at an over voltage/amperage risk?

3
I'm not trying to be difficult just trying to get the instructions correct so my apologize in advance here and thanks again for the guidance.  So far as hard wiring from the servo is concerned if that is what you are after I don't have a direct fault line from there as it is simple as A+ B+ 5V+ and a negative that are fed from the encoder with the same and routed through the G320X (hopefully that makes sense as it's been over a year since I wired the machine).  What exactly am I looking for for a servo fault line?  I have 2 O-scopes I can use one is mine and it's a fluke 97 so I should be able to graph from that on the output of the gecko right?

4
So I think I tried your advise correctly.  I went to ports and pins and un-enabled the pin 10 Estop circuit and ran the same program as before.  It faulted as before as well and in the error log it simply says external Estop requested.  When I have tried to do the PID tuning before I find it to be extremely sensitive to adjustments and am just really happy it does what it does however my brain tells me it is either in the PID tuning or in M3 motor tuning.  I thought it was unusual that the acceleration needed to be so low to get some measurement of stability so not sure where to go from here for a direction.  What is a good way for me to tell when I have the maximum amount of proportional gain with the other 2 cranked all the way down?  It seems to me the drive will fault when it is set that way.  Also is there a way to jog when in the same window as motor tuning?
  Thanks for the advise thus far.

5
General Mach Discussion / Mach III motor tuning with servos and G320X
« on: June 28, 2018, 08:41:49 AM »
Bear with me as I don't have the technical knowledge that a lot of you do.  I converted a ticker tape NC machine to M3 and have it running G-code programs however it will fault out at random instances and I am not sure why.  I am thinking I need to do some more tuning either in the M3 motor tuning page or with the PID adjustments on the drives but am not sure.  Does anyone here have a recommendation on where I should look for motor specs and how I can apply them to motor tuning in M3?  Also is there a way to be in the motor tuning page and activate the jog feature or am I always going to have to save, close the page and then go back in to make additional adjustments?  This machine has some jumbo sized servos on it and I am wondering if I am limited by the Geckos to their speed, right now I have my velocity set at 80 inch and acceleration will go no higher than 5 inch and I think the acceleration is low.  I can get more velocity out of it but the velocity when pushed higher will get me and external E-stop request.  My machine is a belt drive setup from the servo to the screw and to this point I have been unable to get my O-scope to read any signals out of the drives so the PID tuning has all been done by ear which makes me think that may also be a problem as I am not sure if the gain setting is correct however the machine will run smoothly it just randomly faults out (roughly 4000 lines of code).  Any help is greatly appreciated.

6
General Mach Discussion / Re: Gecko line count faults setup help
« on: September 11, 2017, 02:46:47 PM »
I know that I don't have the correct diagnostic equipment to do this the correct way however I was able to tune the PID and now have 2 working axis that seem to respond well.  These are older servos and this is my first experience so I am trying to listen when tuning.  One axis is working very well with no ambient noise and it sound like other examples I have seen in videos.  The Y axis seems to have a little "feedback" kind of like a tick noise here and there that I can't seem to get rid of regardless of where the PID is.  They do both respond to Mach III and are correlated correctly regarding distance and DRO.

7
General Mach Discussion / Re: Gecko line count faults setup help
« on: September 11, 2017, 08:11:20 AM »
I have the current limit set all the way counter clockwise.  I have been trying to get the encoder ppr set so the movements are accurate and I think I have that set however somewhere in making those adjustments I can no longer make the table move.  I am fairly certain the problem is in the PID tuning just not sure what I need to adjust to make it all come together.  I do not have an oscilloscope to do my tuning so I found some "by ear" tuning instructions that are okay at best.  Is there a good way to find out how much juice my servos actually require on an older machine (1983)?  I have some legible labels and I have tried to get info about them before but got stuck trying. 

8
General Mach Discussion / Re: Gecko line count faults setup help
« on: September 08, 2017, 03:05:38 PM »
The encoder passes the paper test.  I did some PID adjusting and am able to get the axis to move like they should just at a super slow rate.  I know this has to do with motor tuning...trying to figure that out now.

9
General Mach Discussion / Gecko line count faults setup help
« on: September 08, 2017, 11:51:19 AM »
I have been able to get my axis moving however they will only move enough to get the line count to go to the fault mode at the drive.  I am sure I have something in setup goofed up but wanted to run some things past you guys to see if I am missing the forest for the trees.  I have a PMD-126/107 going to Gecko G320X drives controlled by Mach III.  I have CUI encoders set to 500ppr and my lead screw requires 5 turns to make 1".  I set up in Mach to have 2500 pulses per unit.  The drives move accordingly so I am confident that I have the pin #s setup correctly for the servo output from Mach.  Do I need to run a "charge pump" to make things happy?

10
Mach3 under Vista / Still no movement with jog
« on: August 29, 2017, 06:23:37 PM »
I have watched all of the artsoft videos and gone over the installation manual and am unable to get my servo to move with M commands and the tab/jog functions.  There has to be something that I am just plain missing.  Any help would be great.  One thing I am curious about is setting the pins for the x y and z signals, right now they are:
x 2 & 5
y 3 & 6
Z 4 & 7

I have no idea if this is right or where to reference to check what it should be.  I am guessing it has to do with my BOB which is a PMDX 126


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