Homing Problem Y axis

[ladjr]

I need some help. My machine Moves all the way to the key board side. It make a graling sound, and finally gives me the "Homing Problem Y Axis".

I talked to LHR on Wednesday and we tried to touble shoot. They suggested it could be I of three things. Cut Motor, Power supply, X termination board. I replaced all three with new parts from LHR. It still does the same thing. I also replaced Head Termination Electronics Board, and the FFC cable all new. I replaced the Y motor from another working machine. It still does the same thing. Any suggestion would be appreicated.

Thanks

[fwharris]

Leo,

WAG, you said it made a "graling" sound, did you check the Y gear box bearings?

[badbert]

Does replacing the y motor mean you replaced the gearbox as well?

[ladjr]

Yes I replaced the gear box


Leo
Life is to short carve something today

[badbert]

I believe the motor stops when the controller senses an increase in amperage draw, from the stalled motor. the grating noise means the belt or gears are slipping, "somehow". So there is never an amperage increase high enough to trigger the signal. Investigating the slippage should solve your problem.

[ladjr]

I believe the motor stops when the controller senses an increase in amperage draw, from the stalled motor. the grating noise means the belt or gears are slipping, "somehow". So there is never an amperage increase high enough to trigger the signal. Investigating the slippage should solve your problem.

I replaced the belt and I checked it. Seem tight. What else should I check

Thanks


Leo
Life is to short carve something today

[badbert]

Leo I am grasping at straws. To be honest, I have no idea what the problem could be... A few suggestions. Put a white mark on the belt. And white marks on the pulleys. You might have to remove the cover and bypass the switches to see. All white dots should stop moving when it hits the keypad side. If they do... then you know that the problem is not the belts and pulleys. If the white dot on the y motor pulley moves but the other two don't. Then you know the belt is slipping. I hope this helps and I will keep thinking about the problem.

[ladjr]

Leo I am grasping at straws. To be honest, I have no idea what the problem could be... A few suggestions. Put a white mark on the belt. And white marks on the pulleys. You might have to remove the cover and bypass the switches to see. All white dots should stop moving when it hits the keypad side. If they do... then you know that the problem is not the belts and pulleys. If the white dot on the y motor pulley moves but the other two don't. Then you know the belt is slipping. I hope this helps and I will keep thinking about the problem.

Thanks for your input. Your guess is as good as mine. I have tried everything.


Leo
Life is to short carve something today

[henry1]

How about the bearing on the Y sometime one bearing could give you a problem they look right sometime one could jam along the way
Henry

[chief2007]

Check the Nylon gear on the Y belt tensioner located by the bit plate. I had one of go bad and when my machine homed, the belt slipped, caused a fault. The inner sleeve wore out. Also ensure the screw on the top of the tensioner is tight. If that is loose, it can cause the belt to slip when homing and when carving.

When you replaced the Y gear box, did you check the shaft and gear play on it as well. Even with the bearings changed, if the shaft or gear is worn the belt can still slip.