Solved Strange new fail. Can't find any like it. Z loses its position

I guess I never updated this thread (was all busy with a new ROBO). think at the time I was ashamed that I gave up.
Repetier did not solve the problem. I got a couple of prints out of it. But it continued to fail in the same way. If I used G29, it would stop going up, or skip layers. If I excluded G29 it would work, but not be able to print decently because the bed wasn't level.
Upon receiving he new one, it worked. I updated the firmware (probably not a great idea), but point being, I updated it with the same firmware that was on the previous model. I can only imagine there was something wrong with the RAMPS? It made no sense, but I did run into one other person at least that has had this problem.

There's an obvious "were the steps for the Z rods correct" question, to which I must answer yes, they were. Why was G29 killing it? No idea, but it seemed to. I mean, I never solved it, so all evidence is anecdotal.

 

Interesting.

Thanks for sharing!

I just greased my Z rods, and slightly loosened the zip tie on the X axis.

The prints are completing now, however are pretty badly ribbed.

It does seem like sometimes these printers lose their brain during the print.

 

pix?

 

Here you go:

 

ewwww
Fix your extruder steps...

well, you're pretty good on dimensions? Maybe a touch tall? looks like extruder has way too many steps per mm

 

http://community.robo3d.com/index.php?threads/read-me-estep-calibration-faq.4672/

 

Great thanks.

I will have a look at that!