Haha! I had a Mini T as my first one. It was a fun little car!

Check out the Tarmo project. I’ve been wanting to put one together for a while.

I realize I’m reviving a super old post here, but I actually did end up figuring out what it was. I posted a little writeup in here if you’re at all curious. You were actually kinda close.

Because I hate when people ask questions and never go back to update their original post when they solve the issue, I’m gonna post an update here and now.

The fix was actually surprising but simple. I ended up moving the second Z axis lead screw carriage mount a bit further towards the motor. That is, the piece that supports the build plate, where it connects to the leadscrew.

Further diagnostics ended up showing me that it was binding, and one of the problems I had later on was that it was binding but only when going up. So I ended up having prints that got progressively more and more stretched out along the z axis.

Moving it to be further in line and loosening a few mount screws to allow the nut to come back to vertical got me to where I needed to be. Hope this helps!

I think I’ll give that a swing. Thanks for your input!

I think you might be onto something but the other direction. I think it’s not moving quite enough per layer.

Yep. I calibrated all the e-steps too. Not just the extruder, but the the movement e-steps as well.

What retraction settings do you have? I’m wondering if maybe that’s contributing to your jamming.