Carriages falls down?

[Unstuck]

Hi! I just got the best birthday present ever last month. Have had lots of fun putting it together and only occasionally giggling like a schoolgirl.

I ordered off for some kapton tape to assemble the hot end with, and while I was waiting I figured I'd try to assess how level I managed to get the bed.

Unfortunately, it seems if I get the head too close to a column, something seems to happen. I took a video of it happeninghttp://www.youtube.com/watch?v=qNCkM8xCseIZ (Around :25 in.)

I've tried searching in the forums for a couple of days, but I'm not sure how to describe it.

The dial caliper mounted on the head seems lighter than the hot end, so I don't think it's that. The belt's teeth are intact. It happens almost identically to whichever column I raise the platform up to - it seems unlikely to me that all three steppers are bad.

I'm kinda lost, to be honest.

[geneb]

First of all, love the nick. If your first name was Come, I could _easily_ see this:

Person 1: Who's that?
Person 2: Oh, he's Come Unstuck!

Person 1: *steps back a bit* Um, sorry to hear that, but what's his name?
Person 2: ...

(Well ok, I'll admit it sounds funnier in my head than in a forum post...)


I really don't see anything bad happening there. Is the move back towards the center uncommanded?

Couple of things - what version of the firmware are you using? What kind?(merlin or repetier)

I suggest you take a look at the software & calibration sections of the 2nd edition of the assembly manual.

g.

[cambo3d]

turn off the stepper sleep mode in firmware/eeprom, when the steppers go into sleep mode (displays shows steppers disabled) Is when this usually happens.

I had a heck of a time calibrating my z because the steppers would go into sleep mode and cause the z to lower,

this may also be what your experiencing.

note: it never did this when using polygons repetier firmware, it started doing this with seemecnc repetier firmware so its probably just a firmware setting.

[Unstuck]

Cambo3d has it! I entered

G1 Z150 x100 y-50

Just like in the video, and the head is still hanging there, five minutes later. Thanks!

The tape arrived this morning, so I'll be assembling the head tomorrow - Then maybe making a giant plastic mess that vaguely resembles a cube. But I don't want to get ahead of myself.

[Unstuck]

(Well ok, I'll admit it sounds funnier in my head than in a forum post...)

...I'd never thought of the whole "... Third base!" aspect of this.

I suggest you take a look at the software & calibration sections of the 2nd edition of the assembly manual.

I take it you're Gene Buckle, as in 'Copyright 2012 by Gene Buckle' in the Version 1.17 of the manual I'm currently using?

This is what I get for not checking back for a new manual - after about the sixteenth time trying to get the limit switch wires down the tower extrusion I seriously considered just removing the belt and doing it over - but I got it eventually.

[geneb]

Yep, that's me. One of the reasons for the 2nd edition manual was to sensibly fold in the tribal knowledge accumulated by other builders into the mainline manual.

g.