Weird grinding noise when referencing X axis

[CadRhino]

I have a new noise that just started happening in my 1100.
When I reference X axis the machine sounds normal but after it touches the X limit switch when it is referencing itself, it makes a grinding/groaning noise as it slowly moves to its reference position. It does seem to reference and I can use the machine. That is the only time it makes that kind of noise. Any ideas what might be going on?
Thanks

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[jwatte]

How old is the machine? How many hours of runtime? Have you ever adjusted or re-tightened the gibs on the bed? When did you last pull the oiling handle?

[CadRhino]

How old is the machine? How many hours of runtime? Have you ever adjusted or re-tightened the gibs on the bed? When did you last pull the oiling handle?

Hi Jwatte
I bought the machine new in 2013.
I’m not sure how many hours but typically it will get run approximately 5 hours a week.

I’m a compulsive Oiler so that is not an issue.
I’ve never checked/adjusted the gibs.

Do you think the gibs at the x reference end have gone out of alignment and need adjusting? After messing with moving the black stop ramp, I did get the noise to stop but now it’s back.

I only get this noise (kind of a stall/grinding) at the x reference. I looked at the stepper coupler and I did not see any slippage when this happened)

Thanks
Nathan

[jwatte]

From what I've read here, checking the gibs would be a good thing to do. They might have worn, if you have 5 hours a week for 5 years on it!

[CadRhino]

From what I've read here, checking the gibs would be a good thing to do. They might have worn, if you have 5 hours a week for 5 years on it!

Ok, I’ll start looking at YouTube videos on how to do it. It’s something I knew I would have to learn at some point.
Thanks

[smokediver576]

Ok, I’ll start looking at YouTube videos on how to do it. It’s something I knew I would have to learn at some point.
Thanks

You might start here:
https://www.nyccnc.com/tormach-pcnc-maintenance/

[CadRhino]

You might start here:
https://www.nyccnc.com/tormach-pcnc-maintenance/

Thanks
I’ll check it out

[cncoperator]

That could be the sound a stalled stepper makes. Try moving the block that activates the limit switch slightly closer to the center of the table.

[CadRhino]

That could be the sound a stalled stepper makes. Try moving the block that activates the limit switch slightly closer to the center of the table.

Good idea. I checked that and there was no slippage.
Weird thing, after running the machine for three hours straight the noise stopped. Maybe the ways were a little dry.

[Spinnetti]

On my machine, the end limit bumper wasn't in the right place... maybe fighting the bumper?

[popspipes]

check the plug that plugs into the stepper driver from the stepper motor, mine would make wierd noises occasionally when the plug burned, luckily I caught it in time and it didnt destroy the mosfets in he driver.

[CadRhino]

Thanks for all the input.
After lots of fiddling around it turns out that my ‘x’ axis limit switch was bad.
I replaced it and it works great now. FYI I sanded the leads down and used De-Oxit in the leads to help maintain good contact.