If stray current is causing problems to plastic bearings, I'd be rather intrigued to see that setup.
These bearing are similar to the roller guides used on doors, they shouldn't deform overnight unless they're made from jelly. Even then, there shouldn't be enough force in a laser cutter to damage a bearing. Very odd.
Most lasers use linear bearings, this sounds like a 3D printer pretending to be one. Still, plastic bearings work on those, even the cheap K40 lasers use plastic rollers on the head.
Tony
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-----Original Message-----
From: [email protected] <[email protected]>
On Behalf Of Dan Mauch
Sent: Saturday, 26 June 2021 3:33 AM
To: [email protected]
Subject: Re: [CAD-CAM-EDM-DRO] Solid V Wheel bearings
Could it possibly because of stray current running thru the bearings. Try
measuring current between the frame and the bearings.
Dan
-----Original Message-----
From: [email protected] [mailto:CAD-CAM-EDM-
[email protected]] On Behalf Of Scott A Tovey via groups.io
Sent: Thursday, June 24, 2021 5:09 PM
To: [email protected]
Subject: [CAD-CAM-EDM-DRO] Solid V Wheel bearings
Hi, My name is Scott.
I joined this group to ask a couple questions regarding bearings as I ran into
an odd scenario over this past month.
Bearings deforming while sitting around doing nothing.
I have a laser burner with Solid V Wheels.
I upgraded the z-axis to one with a manual adjusting knob making it easier to
put the laser at the right spot.
I let the thing set there for about a month and when I turned it on the other
night, that axis was frozen in place. I had to manually force the axis to move,
but when the wheels rotate 360 degrees, the bearings lock in place.
So I swapped out the bearings for ones that didn't have this problem and the
next morning the bearings had developed the same but not as severe
condition.
Has anyone heard of this happening before?
Are there bearings out there with plastic or nylon ball bearings that will
deform should they be holding up a bit more weight than what they were
designed for?
