1 Topic by Bad Coffee

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Topic: Random Endstops hit?

Second time it's done it on the same item.
Repetier-Host Mac .40  Slicer with Ian's settings.  Tweaked for my setup.

Slic3r .9.3 Sliced twice and it still messes up.

It happens the layer when it goes from solid to infill.  I don't know if it has anything to do with it or not.

Repetier Status gives me this:
  3:47:27 PM: Printing layer 1 of 15
  3:50:39 PM: Printing layer 2 of 15
  3:56:12 PM: Printing layer 3 of 15
< 4:00:47 PM: echo:endstops hit:  Y:112.89
< 4:00:50 PM: echo:endstops hit:  Y:111.49
< 4:00:53 PM: echo:endstops hit:  Y:108.95
  4:01:41 PM: Printing layer 4 of 15

I wasn't watching it exactly, just looked up and saw it trailing a bit of filament on the extruder. Here's a pic.

Any ideas?  I can copy the gcode here if needed.

Thanks.
B

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2 Reply by Bad Coffee

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Re: Random Endstops hit?

Could the cable bundle from the extruder head hit the Y endstop?

3 Reply by ronsii (edited by ronsii 2013-02-16 21:41:24)

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Re: Random Endstops hit?

If it is not some weird software thing it may be losing steps when it goes for infill at higher speed(try lowering infill speed to same as solid) if it is this then you may need to check the driver voltages or any mechanical reasons it may lose steps.

One other thing... could you post the stl file just in case it is the cause indirectly.

4 Reply by Bad Coffee

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Re: Random Endstops hit?

Here's the .stl  Pretty simple item, other than it was exported as 8mm instead of the 8cm it's supposed to be.

I just scaled it up to 10x in Repetier.

B

5 Reply by paeltz

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Re: Random Endstops hit?

Try lowering/disabling your 3d settings in Repetier.  My system was locking up about the same point before I lowered these.

Config -> 3D View Configuration -> General ->
     Draw Method =VBO's(Fastest)

Config -> 3D View Configuration -> Model -> 
     Disable show edges

Config -> 3D View Configuration -> Filament ->
     Disable Travel Move Visualization
     Filament Visualization = Simple

Let me know if this helps.

6 Reply by jooshs

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Re: Random Endstops hit?

The soldered connection on my endstops worked their way loose. It started out intermittently showing as endstop hit and after investigating I found the wires were only held in place by the shrink wrap. After resoldering I no longer had the problems.

7 Reply by Bad Coffee

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Re: Random Endstops hit?

Simplified the 3D views, and printed out the belt guard, and it printed fine. 

Watching the good print go from layer 3 to 4, the carriage was in the back left corner. Perfect place for the cable bundle to hit the endstop.

B

8 Reply by IanJohnson

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Re: Random Endstops hit?

I'm having the same endstop problem.  It would happen at the same point of the print, the second perimeter of gear teeth (but not the first).  Nothing was touching the endstops at all.  It may be the same problem with the solder, but I'm doing a workaround right now.  In firmware in Configuration_adv.h there is a line that can be uncommented that will have the endstops ignored at all times other than homing.

9 Reply by solijohn

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Re: Random Endstops hit?

This is very weird. Do let us know if you figure out what the cause of this is. Could the end stop just be dying?

Former Solidoodle employee, no longer associated with the company.

10 Reply by Bad Coffee

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Re: Random Endstops hit?

By watching the second print, the extruder was in the back left corner of the print bed. The cable bundle was jammed back in the corner by the end stop switch when the print jumped.

I printed out the belt guard and the cables no longer jam back in the corner. Bothy copies I printed with the guard in place came out fine.

B