Partial Answer Click / Pop on Z axis (R1)

That's what it looks like, but the belt can't get tighter. One detail I forgot to mention was my glass bed broke a few months ago and I replaced it with a 1/4" aluminum plate. I don't think it weighs any more than the glass. And I had been getting perfect prints up until I started this thread.

I tried it again, upping only the Y to 700, same exact problems. X Z and E seem absolutely fine where they are. No over heating, no slipping or under extrusion.

Could the motor itself be bad? Oh, and I can't seem to order a new belt from Robo3d's shop. They're not even listed.

And thanks for the assistance

 

Upped it to 725, it gets pretty warm, it printed a bit better, but it's still slipping a good deal. Definitely a tooth slip. I think it is the belt at this point.

I removed the metal plate, told Y to move a bit, then pushed and pulled the frame manually by hand. I saw the belt give a little and bounce. Not sure how since it is crazy tight when it isn't moving.

I guess I could get another belt from Amazon? If I can, do you know what belt size I need?

 

Thanks!

I tried slowing it down already. I used to be able to do 1.25-1.5 reasonably ok until this major issue popped up. It didn't even print correctly at 0.80.

I'll make sure that the cog is on correctly.

 

I replaced the belt, tightened it up a lot, and did another print. Y shifted a couple times, but far less than before. So, I tightened it even further. It only shifted once that time. I went to tighten it once more, but I just don't know if it's even good to have it this tight. The further I pull the bed forward, the it gets harder it becomes pull. Pushing it backward seems to release the tension (wherever it is?) and it becomes easy to push. Up until the Y homing button is just about to get touched, the pressure increases again, though only slightly.

Can you have the belt TOO tight? Are the wheels next to the motor too tight? Any idea?

 

I loosened the bearing/wheel on the side that was binding. It doesn't stick now. However, I checked to see if the belt moves up/down any while pushing / pulling and it does move, but seemingly only by 1 mm~. Is that normal? If not, how do I fix it?

Also, when I lift up on the bed on either side it seems like it rocks. I'll record a video in a bit so you know exactly what I'm talking about in case I'm not describing it well enough.

 

i agree with mark, theyre so cheap it isnt worth the time nor headache.

 

Make sure nothing is wrapped around the drive cog on the motor. I had a piece of aluminum tape get wrapped around mine, could barely see it looking at the gear teeth, causing it to skip during prints. It also made the tension vary as I moved the bed front to back like you described. The aluminum tape piece came from the heater tape getting ripped up on the rollers, and drive cog in my case..

You could also have an intermittent connection on the Y stepper cable assembly?