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Help! Starnge nose dive sad smiley

Posted by SlowFoot 
Help! Starnge nose dive sad smiley
July 18, 2017 02:11PM
So I'm finely trying to get my Folger Kossel rev A to run and it is "almost" there.
It moves fine with Repetier's manual commands, Most G-code also work BUT if a do a G1 Z(any value) F1000 it will do a nose dive straight in to the print bed.
I have no clue why.
Any suggestions appreciated,

Cheers!


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Re: Help! Starnge nose dive sad smiley
July 18, 2017 03:03PM
Have you homed Z ?
Re: Help! Starnge nose dive sad smiley
July 18, 2017 04:04PM
Oh yes, obewan. Both with Repetier's home button and G28 works fine. G-code for X and Y movement also works.
Re: Help! Starnge nose dive sad smiley
July 19, 2017 05:12AM
It is something in the Folger "Marlin_delta2" firmware. I changed to RichCattell's "Marlin-matser" firmware form Github and G1 Z worked smiling smiley BUT the servo for the calibration-probe did not. sad smiley
Re: Help! Starnge nose dive sad smiley
July 19, 2017 09:22AM
I think i would be inclined to use repetier dev firmware on this delta or the latest marlin bugfix, as it seems to use a arduino/ramps controller.
Re: Help! Starnge nose dive sad smiley
July 19, 2017 10:21AM
After a bit of tinkering I got the servo to work with RichCattell's firmware and could run autocalibration smiling bouncing smiley BUT after calibration the nozzle hit the bed at Z=3.5. Changing probe Z offset and Z home don't help.
On the positive side, the nozzle moves fairly parallell to the bed.

I'll try a dev Repetier tomorrow.
Re: Help! Starnge nose dive sad smiley
July 20, 2017 12:49PM
Repetier firmware 1.0Dev installed.
And I have a few questions;
How do I set it up so the printer home correctly?
How do I set up the servo for the prob?
How do I set up the calibration probe?

Cheers!
Re: Help! Starnge nose dive sad smiley
July 20, 2017 03:24PM
Are you using the online configuration tool ? [www.repetier.com]
Make sure you select 'delta printer' on the general tab and set the rod lengths etc.

Under the features tab, tick enable z probing and enable servo, this will open up some more options further down the page.
set probe start script M340 P0 S700
set probe end script M340 P0 S1500

P0=servo 0
you may have to change the S value to suit your servo angles
Re: Help! Starnge nose dive sad smiley
July 21, 2017 10:14AM
The configuration tool made it a lot simpler smiling smiley Thanks!
Home works thumbs up
Servo works thumbs up
G1 z works thumbs up thumbs up
and after A LOT of frustration G29 and G32 works thumbs up thumbs up thumbs up
Z is a few tenths lower at the edges then in the middle but that will be a task for tomorrow.
Thanks obewan smileys with beer

Edited 1 time(s). Last edit at 07/21/2017 10:14AM by SlowFoot.
Re: Help! Starnge nose dive sad smiley
July 21, 2017 06:40PM
G32 is if the bed is perfectly flat. if you want to use the distortion corection for a bowed bed, use G33 (uses a different set of probe locations bottom of general tab)
Re: Help! Starnge nose dive sad smiley
July 22, 2017 06:54AM
G33 it is then and a strange thing happen. At 0,0,1 the nozzle is 1.2 from the bed, I move it down 0.4 and at 0,0,0.6 the nozzle is 0.2 from the bed. eye popping smiley that is over twice the movement, It is repeatable and the Z height is correct.
Time to tighten the belts or....?

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eye rolling smileyRe: Help! Starnge nose dive sad smiley
July 22, 2017 08:36AM
I tighten the belts AND now it will not auto-calibrate eye rolling smiley
The probe never reaches the bed and I get an error.
When I move "by hand" Z is OK but during auto-calibrate Z=0 is about 6-7 mm of the bed.
And I have not change anything, only adjusted the belts
Re: eye rolling smileyRe: Help! Starnge nose dive sad smiley
July 24, 2017 02:11AM
Something had changed, one of the cables to the probe-switch had broken off at a solder.
So, almost there (I hope)! Probe height is a bit off and a check of the flatness.
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