Centroid Community CNC Support Forum

Ok guys I’m setting up a Fanuc Spindle with a Delta C2000 drive with Acorn. I ordered a EMC-PG01L now what I’m seeing from you guys that this card is for induction motors only. I see there is a EMC-PG01LU am I seeing this correct that is the card I would need for my Fanuc Spindle. Is there any more...

Good find. Yes you definitely want the drives logic powered all the time. Same as the spindle VFD only cut the main power supply to the drives with estop contactor. I had made some assumptions that all the wiring diagrams would have been drawn like that as it makes no sense to power down the logic s...

There is the possibility that there is an issue with the hardware on the Oak. Maybe a dicky power supply or something not happy in the drive interface part of the board. I am not sure how common or likely this is but dont rule it out. Another option would be do do an absolute bare bones bench test s...

The * in the PID screen indicates the Z feedback signal to the Oak is active. It should only be active once per revolution for a tiny distance. It is the index pulse from the DMM drive. Most likely if that signal is noisy, the a and b signals will be too. So just to clarify, its earthling the 0v out...

>Have you done the tests for encoder feedback working? Just tried that and I can’t even turn the ballscrew without it giving the quadrature error. If I take the OAK PS earth off then I can test and the position is spot on. I think the answer lies here. If with the motor drives disabled you have enco...

So, an important thing to understand is that earth from the mains is primarily for electrical safety and noise noise. It can help as a return path for noise introduced by the mains supply itself. You have done the right thing star pointing the earths. But, remember eliminating noise is about reducin...

No need to start a new thread, unless there is an unrelated issue to discuss. I would definitely like to see your wiring arrangement. The signals to/from the Oak are differential, so very hard to introduce noise into, however, not impossible if you have very bad common mode noise due to high current...

Could you post a video of the noise. I spent a year and a half and several hundred emails working with DMM to try resolve almost every possible issue under the sun. If you are not using their motors then good luck getting them to work. If you are running them in precision mode (A/B) mode then take c...

Also, starting with slower acceleration times (like 0.5s) would make tuning easier. Then works towards faster acceleration.

Usually high frequency control oscillation is caused by too much proportional gain or not enough derivative gain. Usually a good PID tuning method is to start will really low Kp and 0 Kd and 0 Ki, low enough Kp that response is sluggish. Then start increasing Kp bit ny bit until you start seeing sig...