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General Mach Discussion / Servos are herky-jery/very loud w/ mach3 ??
« on: November 22, 2009, 08:49:40 PM »
Before I explain the problem, here is what i'm using.
Leadshine DCS303 DC Servo Drive http://www.leadshine.com/UploadFile/200910162592891415.pdf
Pittman 9234 Brushed 24V DC Servo
US Digital HEDS-9100 512cpr Optical Encoder
Using the software that came with the drives the servo's work great, i can jog them all over and have no issues, they are fast and very quiet.
With mach3 i hardly get them to work at all. The Drive has PUL/DIR inputs, i have them hooked up to the para port and the pins are setup correctly in Mach. Using unmodified tuning values in mach, When i try to manually jog in mach the servo spins but it looks like its pulsing back and fourth while spinning, and almost sounds like a stepper motor, and it only turns in one direction, its just alot slower in one direction than the other.
If i go into the motor tuning window, and put 250 in the "Counts per" and 500 in the field right next to it (can't think of what it is right now, no mach on this computer) i can get it to jog smoothly and its quiet, but it goes faster one way than the other, and if i try to run a program its right back to vibrating and jerking around. If i set the feed rate just right and its on a long straight part of the program, it will turn smooth, but thats the only time..
If i set the "Counts per" or the one next to it to anything +- 20 or so then it will go back to running bad, the more i stray from these numbers the worse it gets.
If anyone has any ideas at all as to what could be the problem here i'd really like to hear them, i've been trying to get it working for days now and i'm about to blow my top.
Leadshine DCS303 DC Servo Drive http://www.leadshine.com/UploadFile/200910162592891415.pdf
Pittman 9234 Brushed 24V DC Servo
US Digital HEDS-9100 512cpr Optical Encoder
Using the software that came with the drives the servo's work great, i can jog them all over and have no issues, they are fast and very quiet.
With mach3 i hardly get them to work at all. The Drive has PUL/DIR inputs, i have them hooked up to the para port and the pins are setup correctly in Mach. Using unmodified tuning values in mach, When i try to manually jog in mach the servo spins but it looks like its pulsing back and fourth while spinning, and almost sounds like a stepper motor, and it only turns in one direction, its just alot slower in one direction than the other.
If i go into the motor tuning window, and put 250 in the "Counts per" and 500 in the field right next to it (can't think of what it is right now, no mach on this computer) i can get it to jog smoothly and its quiet, but it goes faster one way than the other, and if i try to run a program its right back to vibrating and jerking around. If i set the feed rate just right and its on a long straight part of the program, it will turn smooth, but thats the only time..
If i set the "Counts per" or the one next to it to anything +- 20 or so then it will go back to running bad, the more i stray from these numbers the worse it gets.
If anyone has any ideas at all as to what could be the problem here i'd really like to hear them, i've been trying to get it working for days now and i'm about to blow my top.