1 Topic by jtw11

  • jtw11
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  • Registered: 2014-03-24
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Topic: Frustrating post-print z movement

Hi all,

First post of these forums... I've recently begun using my SD4 on a different PC, and have been experiencing a somewhat annoying moement of the Z axis post print.

When a print finishes, or I kill a print - the bed moves down about ~50mm, but awfully slowly - and there's nothing I can do about it but wait, so if I'm tweaking settings - I've got to waste a couple of minutes, over and over and over...

I'm using Repetier Host & Slic3r. This actually happens on any PC I try.... other than the one I've been using for a while.

Any ideas how I can stop this? Once the print finishes, I'd like the hot end just to go park itself in the corner, and not waste my time by moving the Z axis so slowly....

Thanks in advance!

2 Reply by rjp350z (edited by rjp350z 2014-03-25 20:50:38)

  • rjp350z
  • rjp350z
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  • Registered: 2013-01-11
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Re: Frustrating post-print z movement

what does your end g-code show in repetier/slic3r?

3 Reply by jtw11

  • jtw11
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Re: Frustrating post-print z movement

Hi there,

I've just taken a look at the start and end codes now, the printer is currently running a job so I can't test any changes, but having now looked I see the answer is somewhat obvious.

There is a G1 code moving the bed down 50mm at a slow feed rate, so I can simply remove this (and the relative G91 code on the prior line) - and then lower the bed manually as I wish.

Start code...

G21; set mm units
G90; set absolute coordinates
G92 E0; reset extruder distance
G28 X0 Y0;home x and y axis
G1 X100 Y100 F4000; move Nozzle above bed
G28 Z0; home Z axis 
G92 E0; reset extrusion distance
G90

End code...

G28 X205 Y200
G91
G1 Z50 F50

Ah, so that prior experience with g-code has come in helpful indeed!

Thanks for the idea, I didn't know you could edit the start and end code seperately in Repetier, but quickly found you could after you asked for the codes.

Many thanks!

4 Reply by rjp350z

  • rjp350z
  • rjp350z
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Re: Frustrating post-print z movement

No problem, glad you figured it out.

Sometimes all you need is a little "NUDGE" in the right direction. wink