X Axis only moves +

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promisemachining
Posts: 82
Joined: Thu Nov 17, 2016 2:59 pm
Acorn CNC Controller: No
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CNC Control System Serial Number: 0327060180, T39 A90089, M-39s 3535, M-39s 3770, M400ac/inv, M400ac/atc 10388
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X Axis only moves +

Post by promisemachining »

Sirs,
I have a Centroid CNC7 running version CPU10 on a Bridgeport Boss 6 Series II 3 Axis CNC Mill. Running Centroid DCIO3B with Centroid 29 in lb servo motors, with original factory encoders. Boss Kit, System #A50171. Centroid Boss Kit wired control pendant.
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I recently went to set up my next job only to find that the X axis will only move in the positive direction. It moves rapidly in the + direction for about 1/2". It moves in the same + direction regardless of the + or - button on the control pendant being pushed. It shows an error message of "410 X axis (1) positional error. Stall job cancelled."
Centroid Screen.JPG
The Y & Z axis jog properly.
i have restarted the system and computer several times. I have inspected the X axis servo wiring and found no loose connections or evidence of damaged wires or the encoder or motor.
Please advise.
Thank you,
Tim


cncsnw
Community Expert
Posts: 4595
Joined: Wed Mar 24, 2010 5:48 pm

Re: X Axis only moves +

Post by cncsnw »

That is usually a sign of a hardware failure in the X axis servo drive. You should contact Centroid about sending the DC3IOB in for evaluation and repair.

You should also take a hard look at your X axis motor, referring to TB155:
https://www.centroidcnc.com/dealersuppo ... ds/155.pdf
Pay special attention to the resistance test between the armature leads and chassis ground. Fluid contamination (coolant or oil) and/or excessive carbon dust buildup can cause enough continuity between armature and case to damage a servo drive.


promisemachining
Posts: 82
Joined: Thu Nov 17, 2016 2:59 pm
Acorn CNC Controller: No
Allin1DC CNC Controller: Yes
Oak CNC controller: No
CNC Control System Serial Number: 0327060180, T39 A90089, M-39s 3535, M-39s 3770, M400ac/inv, M400ac/atc 10388
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: Yes

Re: X Axis only moves +

Post by promisemachining »

Sir, Thank you! I will start working through your recommendations.
Tim


CentroidFrog
Tech Support
Posts: 134
Joined: Wed Jan 29, 2025 9:39 am
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Allin1DC CNC Controller: No
Hickory CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No

Re: X Axis only moves +

Post by CentroidFrog »

What happens if you go into MDI without any faults or errors?
Does X start running away and then give the position error?
Want to post your own question?
Check this out first: http://centroidcncforum.com/viewtopic.php?f=60&t=1043
Acorn CNC tech tips: viewforum.php?f=63


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