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Author Topic: Spindle moving slowly from right to left  (Read 2415 times)

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Spindle moving slowly from right to left
« on: December 18, 2011, 02:24:45 AM »
Hi everybody, i am new in cnc machine, when l turn on spindle motor from control box without loading any G-Code, my spindle bits will move slowly from right to left. Can anyone tell me what actually happening here. I afraid that it will cause different end results if l load my G-Code. Thank you.

Offline Tweakie.CNC

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Re: Spindle moving slowly from right to left
« Reply #1 on: December 18, 2011, 04:37:47 AM »
Hi Ben,

Could well be electrical noise. Are you using a VFD with your spindle motor ??

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.
Re: Spindle moving slowly from right to left
« Reply #2 on: December 18, 2011, 04:58:36 AM »
Exactly, mine is 220v cnc machine with 800W spindle and 1.5KW VFD, please help me, l am confused now.

Offline Tweakie.CNC

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Re: Spindle moving slowly from right to left
« Reply #3 on: December 18, 2011, 05:28:52 AM »
Hi Ben,

VFD's are notorious for producing electrical noise.
Check that you have no 'earth loops' and that your VFD is only earthed at one point.
Re-route your spindle cable away from any signal cables.
Check that you have no 'GND loops' in your wiring layout.
Use shielded cable for your limit and estop switches and only connect the screen at the controller end.

Just a few things to try,

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.
Re: Spindle moving slowly from right to left
« Reply #4 on: December 29, 2011, 05:03:55 AM »
Hi Tweakie, sorry for late reply. The problem that l had is due to "rubbish pulse in my cnc working environment", thank you Tweakie for helping me to solve my problems, you are awesome  ;)

Offline Tweakie.CNC

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Re: Spindle moving slowly from right to left
« Reply #5 on: December 29, 2011, 05:30:25 AM »
Hi Ben,

I am really pleased that you found the problem and it is working OK.  ;D

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.