1 Topic by satman49

  • satman49
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  • From: virginia
  • Registered: 2012-12-28
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Topic: runaway bed

Sometimes when I am moving the bed down I inadvertently move the Z arrow in RH past 200 and the bed tries to go there.If I am not right there the bed bottoms out and tries to keep going down, makes a terrible grinding noise. The only way that I have found to stop it is to power down the printer.I thought "turn  off motors" would stop it but doesn't.

SD3, E3D hotend,linear bearing on x/y axis',pillow block bearing on y conneting rod, ball bearngs on front y axis, fan on y stepper motor.

2 Reply by Tomek

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Re: runaway bed

Do you use repetier? You need to go to printer config and define your Z-axis limits. Mine is 151 or something about that much.

3 Reply by ronsii

  • ronsii
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Re: runaway bed

the number will a little less than 200 depending on your z stop on a SD3

The best way to figure it out is zero the z axis them using RH move the bed down to about 180 or so then move it by the 1mm step until you hear it stall, look at the coordinates for z and use that number -1mm of course.

4 Reply by satman49

  • satman49
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Re: runaway bed

I  use RH , latest version. Do you mean in printer settings/printer shape /print area depth? One more thing that I think is odd that on the manual control tab the+Z arrow moves the bed down, I would think the  - Z would do that.

SD3, E3D hotend,linear bearing on x/y axis',pillow block bearing on y conneting rod, ball bearngs on front y axis, fan on y stepper motor.

5 Reply by Leghk (edited by Leghk 2013-03-15 01:15:27)

  • Leghk
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Re: runaway bed

It's all relative to the extruder nozzle, which is at a relatively +Z position when the bed is lowered.

Edit: I suppose the right thing to say is that it's relative to the model space where the head would extrude...

Don: Folger Tech 2020 Kossel Rev A + Borosilicate + Snow Effector
        Davinci 1.0 + Repetier : Filastruder
        SD3 + RAMPS + Lawsy Carriages + E3D + Borosilicate + ... : Cupcake

6 Reply by pcpoirier

  • pcpoirier
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  • From: Wichita Ks
  • Registered: 2012-10-25
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Re: runaway bed

upper right Emergency Stop shuts down everything.