Problem- Using metal box for my controller, is it right?

[davaro]

When I was tested all components (NEMA 23 servo, g320 gecko drive, using encoder AMT 102, with C10 break out board and using a power suply KL 600 48). I was able to move the servo correctly through Mach 3.
Now that I moved everything to a metal box I connected ground and all negarives to ground as well. Now the servos are not working, I was getting the servos to just to spin in one direction not even sending a signal from Mach 3. I disconnected ground completely and now I am getting a different fault. The servo moves to one side and then to opposite direction, I tried to tune the servo by using Limit, gain , etc. But I was not successful. The servo gets hot, and I send signals from Mach 3 and the servos do not get it.
C10 Breakout board, power supply, and gecko drives are attached to the same metal box. Should I separate all these three devices from the metal?

Please let me know what I should do to make my first cnc to work.
Thanks in advance for your help.
DVR

[dmauch]

If the motors spin without a signal that means that you need to swap the wires on your servo motor because it is out of phase with the encoder.
I use metal cases so that is not the problem.
You may have other problems.But you should be able to get the motors to lock upwithout any signal. If your motors are getting hot then you may not have the proper power supply. What is the voltage of the servo motors?
dan

Originally Posted by davaro When I was tested all components (NEMA 23 servo, g320 gecko drive, using encoder AMT 102, with C10 break out board and using a power suply KL 600 48). I was able to move the servo correctly through Mach 3. Now that I moved everything to a metal box I connected ground and all negarives to ground as well. Now the servos are not working, I was getting the servos to just to spin in one direction not even sending a signal from Mach 3. I disconnected ground completely and now I am getting a different fault. The servo moves to one side and then to opposite direction, I tried to tune the servo by using Limit, gain , etc. But I was not successful. The servo gets hot, and I send signals from Mach 3 and the servos do not get it. C10 Breakout board, power supply, and gecko drives are attached to the same metal box. Should I separate all these three devices from the metal? Please let me know what I should do to make my first cnc to work. Thanks in advance for your help. DVR

[Fastest1]

Steppers or Servo? The metal box can have an effect if you are incorrectly grounded it will trigger a reset or sometimes wont work with no clue why. What do you see on your diagnostic screen? If you unplug your controller from your pc after turning the power off of course will Mach work according to the DRO's? Or is it stopped. If the dros dont move and the reset is not flashing when connected I suspect a ground problem only if you have had the machine running before. If you have never had the steppers/servos move before then there are way too many things it could be, most likely a setting in that case. BTW the pc ground via the parallel port should NOT ground to the controller chassis. That caused me much grief when I insisted on using a metal case I already had that was nice but the plans for the kit specified a plastic case. They had never had the problem because the ground wasnt being shared. Hope this helps. I used a plastic DB25 jack on my controller with nylon screws and washers to make sure the ground didnt touch the case. Works well now. Same thing happened when starting to run a digital probe again the ground was the culprit.