Print completed but print head did not home?

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Culyx
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Print completed but print head did not home?

Post by Culyx »

Print completed successfully and I went to check the printer, the print head was still down. So everything was 100% but apparently the print head just did not home back after finishing the print.

[img]https://imgur.com/a/TF8xkJQ[/img]

As you can see there's just an indent at 0,0 where the head stopped, but it didn't rise back to the top of the tower; so things cooled and there's a divet. =P

Using CURA 4.5.1 to slice, anything to check on or is this just a random error?

geneb
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Re: Print completed but print head did not home?

Post by geneb »

Check to make sure there's not an M84 command in your end-gcode. M84 turns the steppers off and that can cause the hot end to slowly lower to the bottom of the printer.

g.
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Culyx
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Re: Print completed but print head did not home?

Post by Culyx »

Wow, that was on point, here's what I see at the end of this gcode:

G1 F3000 X24.604 Y-4.805 E2303.46894
G0 F21000 X24.604 Y-5.512
G1 F3000 X25.202 Y-6.11 E2303.5041
;TIME_ELAPSED:3536.191845
G1 F4800 E2298.5041
M140 S0
M104 S0
M140 S0
G92 E1
G1 E-160 F5000
M203 Z24000
G28
M84
M83 ;relative extrusion mode
M104 S0
;End of Gcode

An M84 line is there, is there something in Cura that i missed that made it do this?

geneb
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Re: Print completed but print head did not home?

Post by geneb »

Nope, it's just a like in the end gcode config in Cura. Edit the Cura end-gcode config to remove it. Most of the time the M84 isn't an issue, but for some especially well-tuned machines, it will result in the effector platform slowly sliding to the bottom. The effector platform weight overcomes the static friction of all three individual axes.

g.
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Culyx
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Re: Print completed but print head did not home?

Post by Culyx »

Do I only need to remove the M84 or is there something else I need to put in it's place for the print head to actually home?

geneb
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Re: Print completed but print head did not home?

Post by geneb »

The G28 causes it to home. Just remove the M84.

g.
Delta Power!
Defeat the Cartesian Agenda!
http://www.f15sim.com - 80-0007, The only one of its kind.
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