Z-Axis with Brake problem (Resolved)

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zz0122
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Z-Axis with Brake problem (Resolved)

Post by zz0122 »

Hallo,
My name is Yan, I'm brand new to Centroid community.
I hope somebody could help me with my problems.

I did the setup and everything went well accept I cant do homing 3 axis manual jog.

- I followed the instruction per this Video for auto homing and squaring.
The problem Im having is the brake relased. so as soon I hit "Cycle start" to start homing sequence, my z-brake is released that caused my Z-drive dropped and create "Drive Fault". My brake rated 120VAC, so I used SSr to activate.
Did I do something wrong?

- if I manual jog, I can move x and y no problem, soon I hit Z, "Drive fault". so I reset, then I tried Z and Y manual jog, its work fine, but soon I hit X, "Drive fault" again. Then I hit reset, again I tried X and Z, work fine, soon I hit Y, "Drive fail".
seem like I cant manual Jog 3 axis. the 3rd one always "Drive Fault". do you know what causing I cant jog the 3rd axis?
Photo Oct 25, 4 53 40 PM.jpg
Photo Oct 25, 4 52 55 PM.jpg
Photo Oct 25, 4 53 00 PM.jpg
Photo Oct 25, 4 53 08 PM.jpg
Photo Oct 25, 5 17 27 PM.jpg
Photo Oct 25, 5 17 34 PM.jpg
report_0035FF952D4F-0915203716_2020-10-25_17-03-28.zip
(589.05 KiB) Downloaded 110 times
Thank You in Advance
Yan
cncsnw
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Re: Z-Axis with Brake problem

Post by cncsnw »

Does your axis drive show the fault condition? Or does the fault only show on the CNC12 screen?

How exactly do you have your drives wired to the INP5 "DriveOk" input?

It sounds to me like you have some sort of interdependency, where enabling all three drives causes the DriveOk input to open; while enabling only one or two drives leaves at least one still holding the DriveOk input down.
zz0122
Posts: 30
Joined: Wed Sep 30, 2020 11:23 pm
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Re: Z-Axis with Brake problem

Post by zz0122 »

Hi cncsnw,
Thank You for your replied, below my answer to your questions in bold
cncsnw wrote: Mon Oct 26, 2020 2:44 am Does your axis drive show the fault condition? Or does the fault only show on the CNC12 screen?
Yes, it does show on my Servo (i have clearpath servo and it blink orange)

How exactly do you have your drives wired to the INP5 "DriveOk" input?
I have Clear servo board from CNC4PC (C86ACCP). and the board has "Drive OK" output. I followed this instruction (https://www.cnc4pc.com/blog/post/Wiring ... %20C86ACCP)

It sounds to me like you have some sort of interdependency, where enabling all three drives causes the DriveOk input to open; while enabling only one or two drives leaves at least one still holding the DriveOk input down.
martyscncgarage
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Re: Z-Axis with Brake problem

Post by martyscncgarage »

Let's explain how the AxisBrakeRelease is supposed to work. (Just to be clear)
Your brake should be locked keeping the axis from "dropping" UNTIL movement is called for. That could be jogging the axis, homing the machine or an MDI command. It should then stay UNLOCKED provided there is no control faults and no Estop activations.
The moment an axis is asked to move, the servo must enable and the brake is released. You say your axis drops.
It sounds like your drives/motors are not enabled at the same time the brake is released (your clearpath maybe fighting the brake and faulting)
Could you support the Z axis on block, to keep it from falling, and then will the brake release and the Z axis move up if you jog it up?

I am assuming your SSR is connected to the output you programmed for AxisBrakeRelease and the brake is working properly.

Marty
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
zz0122
Posts: 30
Joined: Wed Sep 30, 2020 11:23 pm
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Re: Z-Axis with Brake problem

Post by zz0122 »

Hi Marty,
Yes, its connected to output2 the brake seem work properly. If I do manual jog, the the brake released and I can jog the Z axis no problem, I can jogged up or down even stand still without dropping. but soon I click "Cycle start" the Brake release, z-axis dropped and brake shut , and CNC12 "Drive Fault". I seems like the servo not "enable" fast enough to hold the position.
I just tried to follow your recommendation to support the Z-axis, now its not even moved. The brake released and closed immediately and the "drive fault" and ""Job Canceled".
I attached the latest Report.

Thank You
Attachments
report_0035FF952D4F-0915203716_2020-10-26_08-30-30.zip
(623.24 KiB) Downloaded 131 times
martyscncgarage
Posts: 9912
Joined: Tue Mar 28, 2017 12:01 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
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CNC Control System Serial Number: none
DC3IOB: No
CNC12: Yes
CNC11: Yes
CPU10 or CPU7: Yes
Location: Mesa, AZ

Re: Z-Axis with Brake problem

Post by martyscncgarage »

zz0122 wrote: Mon Oct 26, 2020 11:45 am Hi Marty,
Yes, the brake seem work properly. If I do manual jog, the the brake released and I can jog the Z axis no problem, I can jogged up or down even stand still without dropping. but soon I click "Cycle start" the Brake release, z-axis dropped and brake shut , and CNC12 "Drive Fault". I seems like the servo not "enable" fast enough to hold the position.
I just tried to follow your recommendation to support the Z-axis, now its not even moved. The brake released and closed immediately and the "drive fault" and ""Job Canceled".
I attached the latest Report.

Thank You
Well, the "Drive Fault" is a fault condition and would de-energize the brake causing it to lock. So it is functioning properly.
You may have to go back to CNC4PC and explain what is going on...
Marty
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
zz0122
Posts: 30
Joined: Wed Sep 30, 2020 11:23 pm
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DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No

Re: Z-Axis with Brake problem

Post by zz0122 »

:( ... so do you think its the board problem? that also causing the problem with 3rd axis I jogged would causing "Drive Fault"
martyscncgarage
Posts: 9912
Joined: Tue Mar 28, 2017 12:01 pm
Acorn CNC Controller: Yes
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CNC Control System Serial Number: none
DC3IOB: No
CNC12: Yes
CNC11: Yes
CPU10 or CPU7: Yes
Location: Mesa, AZ

Re: Z-Axis with Brake problem

Post by martyscncgarage »

zz0122 wrote: Mon Oct 26, 2020 11:59 am :( ... so do you think its the board problem? that also causing the problem with 3rd axis I jogged would causing "Drive Fault"
I do not have any experience with CNC4PC's board for Teknic Clearpath servos. I can not answer your question.
The fact that you can jog the axis, the axis brake releases fine, makes me wonder about a timing issue.
To be clear, you can jog the axis on a fresh power up (Before trying to home?)

Maybe another user with a similar setup as yours will chime in.
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
zz0122
Posts: 30
Joined: Wed Sep 30, 2020 11:23 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No

Re: Z-Axis with Brake problem

Post by zz0122 »

Yes, I can jogged all the axis on fresh power up, except the 3rd axis I jogged would create "Drive Fault".
I dont know if the wiring diagram would help, but I attached the screen shot of my system wiring diagram.
Wiring.png
Thank You
martyscncgarage
Posts: 9912
Joined: Tue Mar 28, 2017 12:01 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC12: Yes
CNC11: Yes
CPU10 or CPU7: Yes
Location: Mesa, AZ

Re: Z-Axis with Brake problem

Post by martyscncgarage »

But earlier you said: " If I do manual jog, the the brake released and I can jog the Z axis no problem, I can jogged up or down even stand still without dropping."

So you can or CANT jog the Z axis manually on start up BEFORE trying to home?
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
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