SoliForum - 3D Printing Community — unexplained Z-lift

Re: unexplained Z-lift

null@example.com (wardjr) — Wed, 10 Feb 2016 17:41:38 +0000

Many of us avoid z-lift at all costs. I'm guessing mechanical binding on the guide rods and threaded rod.

Re: unexplained Z-lift

null@example.com (driggers) — Wed, 10 Feb 2016 17:30:40 +0000

I'm blowing air on it now, as the stepper drivers seemed very hot. I haven't run prints at 97 degrees before, so do you suppose this higher temperature and current draw (bed heater direct from board) could have a motor skipping effect? So the Z-axis was lifting and then not being able to come back down (recall that coming back down = bed go up, which is more work than simply gradually lowering bed!).

Maybe this is why I seemed to be getting all my layers squished together on this print too (sometimes but not every time). I'll be making electronics enclosure with fans soon.

Betwen the PSU fan, extruder fan, hot end fan, and electronics fan (a fan space heater that is not heating) my printer sounds like a wind storm.

Also, there is a very high pitched whine sometimes -_-

Re: unexplained Z-lift

null@example.com (wardjr) — Wed, 10 Feb 2016 16:33:44 +0000

I would ask the same question and add that your Z isn't moving freely. Probably time for some cleaning and lube. Perhaps even a slight VREF tweak.

Re: unexplained Z-lift

null@example.com (IronMan) — Wed, 10 Feb 2016 16:30:49 +0000

Are you running a cooling fan on your Sang board? Z-lift could be overtaxing the system a bit...

Q. - Why are you using Z-Lift?

unexplained Z-lift

null@example.com (driggers) — Wed, 10 Feb 2016 14:14:27 +0000

Printing was going fine until I went away for about 10 minutes and came back to find that Z had lifted quite a bit higher than it should.

I was running heaters at 230 hot end, 97 bed, printing at a normal speed. Had Z lift at 1mm which seemed to be behaving fine.

This is not an extrusion problem.