Acorn+ClearPath Servos - Axis Fault during Home (Resolved)

[wolfgangr]

Thanks for the great feedback - we have incorporated the comments and have produced another slideshow. Thanks in advance for your valuable feedback

Acorn&ClearPath Axis Fault.pptx

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[martyscncgarage]

What's it going to be Wolfgangr and Rdsmith24, which thread are you going to continue to post to.
I'm going to delete one of them....
PLEASE keep the build in ONE thread.

Marty

[wolfgangr]

Hi Marty

No worries we will work from wolfgangr going forward. Sorry about that

Wolfgang

[martyscncgarage]

How enables work:
"rdsmith24 wrote: ↑Fri Mar 19, 2021 8:16 am
We tried to invert the enable under the advanced screen. When we invert the signal never gets to the servos to turn on."

What is the significance of the LED next to the EN outputs?
Tells you the state of the output.
It will change when:
CNC12 is Reset and in its ready state
You try and jog AN axis from the VCP (BEFORE HOMING) Only that axis will change Enable State
You Go into MDI. ALL axis will enable
You HOME the control.

[wolfgangr]

Hi Marty not sure if you had a chance to look at the slides - it shows the problem we are having clearly.

Thanks W

[martyscncgarage]

Hi Marty not sure if you had a chance to look at the slides - it shows the problem we are having clearly.

Thanks W

As I mentioned, the EN LED's change state when you move the axis,

HAVE YOU WIRED per attached Acorn schematic?
IF so, have you loaded the Clearpath DRIVE in the Wizard?

I have NOT (and likely will not) wire the drives per the schematic. I have used C86ACCP successfully on my Syil X4 mill.
Maybe one of the other guys that have hardwire CP motors can answer. I am not sure if anyone has used ETHER1616 with Clearpath yet.

I would try and wire per the schematic and then learn what is going on and THEN go to Ether1616

[martyscncgarage]

Oh, it would be better if you uploaded your photos, used a google album. You are forcing users to download a Power Point presentation.
I personally can't zoom into the pictures in your "presentation" to see detail.


Marty

[Gary Campbell]

This may or may not have been mentioned, but Centroid's ENA logic is not really setup to be used on stepper systems, especially closed loop with alarms. They work great on systems that provide encoder feedback to the controller, but as reported here dozens of times, do not enable the drives until motion is commanded. Great where the system has feedback and can determine there is no problems, but not so great in the step and direction arena where an alarm is the only feedback.

For this reason I have never used the ENA terminals. I do this because there are no advantages to use them, but multiple disadvantages when you do. I will either use a terminal connection or when there is a reason, have the ENA signal on a relay circuit that I can control.

[Dave_C]

Ok, I studied the Power Point pictures as best I could. Like Marty said, hard to zoom in for detail but I did pick up on one thing that may make sense.

You can jog two motors with no issue. Is that correct? (Enable stays green on the CP motors)

When you jog the third motor you get a "drive fault" alarm and that "makes the enable/disable change to "disable. Is that correct?

All three motors appear to be the same size, so are you using the same exact setup on each motor?

If all of the above is true I'd say you have a problem with one of the motors. Try switching the motors from one axis to the other and see if the problem follows the motor. I apologize if you have already posted that detail and I have forgotten it by now.

If the problem does not follow the motor, then make sure all three wire harnesses are color for color.

Dave C.

[rdsmith24]

Marty,
The machine is wired per the latest (3/5) schematic provided by Centroid. I understand that you are using the other option but we chose not to use that because:
1. They wouldn't answer questions about the board (what is the large chip in the middle) via their tech support.
2. Not to introduce something NOT supported by Centroid at the time we built this.
3. I realize that you have had good luck with this (I've watched the video) but Wolfgang is trying to make shat we have work.
4. The LED's may be indication of actual EN output being turned on but I disagree. All of the EN outputs are being held low when the machine is reset, when we move an axis, the LED turns RED...everything will still move because Centroids schematic has all of the EN outputs tied together. As soon as we move the third axis (any combination) the EN outputs are reset because the last output appears to be disabled. Thus disabling the servos, inputing DRIVE FAULTS, (because the servos where just turned off from lack of EN output).

Dave,
All of the motors are not the same size but all we have loaded are the no-load tuning values, set for STEP/Direction and HLFB set for SERVO ON. We have swapped the cables, its doesn't matter which one or what order or what motor, and yes we have ohmed the wiring from the molex to the Acorn wire by wire....

Thanks for the response.