X axis slips at far left

[rayw]

The last 6 inches of travel to the left are slipping. The motor goes, but the screw hangs up. A little push to the left on the router and it continues. Movement to the right is the same u til I get about 6 inches off the edge.

Something needs to be tightened. Not sure where.

Thanks!
Ray W.

[Derek the Admin]

It is the coupler that needs to be tightened. That's what links the screw to the motor shaft. It also likely a little misaligned if it has enough hold between those two shafts at one point of travel but not the other. It is probably enough for the coupler to compensate for, so I wouldn't change anything alignment wise. Tightening the coupler should get you fixed up.

[rayw]

Thanks, Derek. The shaft still slips. Are you asking me to tighten the easy to access screw or the one that is tucked back in there? That one is tough to reach. Any suggestions?

Update: I was able to squeeze the coupler with a C-clamp and then tighten the screw just the littlest bit and I think I stripped the screw. At least, I think I did because it is better but not as good as it should be. I increased the feedrate (for jogging) just a bit and again, it helped but just a small bit. It cannot reach 0,0.

After all this back and forth, I think I am seeing the slightest wave in the X-drive shaft (screw). I don't see it in the middle of the shaft.

[Derek the Admin]

It could be either, but the one that is hard to get to is the one that is probably too loose. They both have to be sufficiently tight or it will never work. You can probably take off the X motor (it's a bit of a hassle, but very doable). If the screw side of the coupler is tight enough it will just pull the coupler apart. That is okay. Then just tighten the motor side of the coupler down, line the "jaws" of the coupler back up as you re-install the motor, tighten it down, and you should be all set.

Hope that helps.