Unresolved X-Axis bouncing?

Sorry if covered elsewhere, but I couldn't find anything on this.

When homing all axes in MatterControl, the system used to move the print head to the front left corner of the bed (smoothly) and be done. Today, the Y- and Z-axes are fine, but moving to X=0, the unit hits the switch, and bouncing (opening/closing the switch) 2 or 3 times before settling. Same thing happens when leveling the bed (like it tries to take X negative).

Only things that have happened are fixing a clogged extruder (but didn't have to disassemble), and I updated MatterControl today. Anyone else had this happen, and know if it's MC or something else?

 

Thought I'd add, my MatterControl is build 1.3.0.4824 (most recently updated today).

Tried a print, and noticed the inner grid lines are wavy. They used to be straight, so something definitely changed. Sorry for the bad pic (it's still running):

 

Thanks for the suggestion. Don't think it's a blocking issue, because it's actually reaching end of travel, but trying to keep going (bouncing off the limit switch). Trying another slicer sounds like a plan. Thanks again.

 

Contacted support, and still waiting for a resolution. But in case anyone else runs into this, here's a video of what my R1 Plus recently started doing:

 

When I got my printer it did something similar, the screw that was supposed to hit the switch wasn't long enough to depress the metal bar enough to trip the switch. I swapped it out with a slightly longer bolt and it works fine. It's hard to tell from the video on my little phone but maybe the switch is not being depressed enough to fully activate?

 

Thanks for the suggestion! Think I remember reading that (your, or someone else's, post).

Tech support e-mailed me back and suggestion calibrating the print head with the build plate, checking the limit switches (M199 code), and lubing the X-axis rails (more related to a shifting problem). I'll try those AND your suggestion and post which one works for future reference.

 

Since a few people offered suggestions, and others may run into this problem, I wanted to post what worked on my machine...

But for now, it'll have to wait! For some reason, last night and today, it homes all axes just fine. No bouncing/stuttering at all. So now I'm really lost as to what was wrong, since it seemed to fix itself. I'll post a more conclusive result IF I actually fix it, if/after it starts again.

 

I'm getting some axis issues today. I'm not sure how to explain it other than a picture of what my print is looking like. Also, possibly noteworthy, the printer makes a little thumping noise as it's going, I believe it's coming from moving around the x-axis but I am uncertain.

 

It seems to travel fine, it grinds a bit on the far y-axis on one side, but I'm pretty sure I just tightened the belt a little too much. Other than that the moves fine, while doing the pre-print routine of going around the bed

 

Medium speed, normal settings for MC, the filament is fine

 

It's got a little bit of a twang

 

What is a paper leveling?

Oh, and I have an MC update available, let's see if that helps