Topics

1

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.

2

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?

3

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

4

General Mach Discussion / Spindle speed non-responsive

« on: June 01, 2017, 05:51:11 PM »

I am new to everything here so please bear with me.  I just got this cnc conversion (was a cnc prior) running today and seem to have run into a wall.  When I try to adjust spindle speed with the MDI and the main screen (alt 1) with the feed rate override there is no difference in spindle speed.  Also It doesn't seem to matter if I type in a speed in the rpm box below it always runs the same rpm.  I am guessing I have something messed up in settings I just can't find it.  The VFD can control the speed when running the machine from the VFD so I think I have that set correctly.  I searched the forums for quite a while and checked over some things however I have yet to find a solution.  Any help is greatly appreciated.