Homing advice
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Z axis moves about 11mm when i push 10 now.
working on a video as we speak.
hotend is at temp, i can push fillament through.
i am able to jog the head around the bed fine.
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here is the beggining of it, i could only get that cuz i couldnt get a full size video to upload anywhere. in the video he hear the begining and then the bed start to lower, goes almost all the way down then the extruder starts to move around list its printing with the bed all the way down almost.
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Your Z endstop is at Zmin, not zmax.
Change this
M574 Z2 S1 P"zstop"To thisM574 Z1 S1 P"zstop"Then change your homeall and homez from this
G1 H1 Z305 F360 ; move Z up stopping at the endstop G90 ; absolute positioning G92 Z300 ; set Z position to axis maximum (you may want to adjust this)To this
G1 H1 Z-320 F360 ; move Z stopping at the endstop G90 ; absolute positioningDirection change and removing the G92
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It also doesn't look like your hotend fan is spinning. Was it at temp?
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I made all 3 changes, but then when i tried to home it sent the bed to the bottom (homeing was working) so i put it back and put the homing configs back.
left the z endstop the same and the same thing happened when i sent a print job, the bed went to the bottom and then the extruder started trying to print while the bed was at the bottom.
the hotend said it was at temp according to the web page for the board. i was able to mannually turn the fan on with a setting at the bottom of the page.
i feel like we are getting close, sorry for being a pain.
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@agent0810 said in Homing advice:
but then when i tried to home it sent the bed to the bottom
Then we need to change the motor direction for Z like we did for the X and Y. The config changes were correct.
@agent0810 said in Homing advice:
i was able to mannually turn the fan on with a setting at the bottom of the page.
Then I think maybe your fan plugs need to be switched, because your part cooling fan was on.
@agent0810 said in Homing advice:
i feel like we are getting close, sorry for being a pain.
almost there. no pain at at all.
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alright so it helps if i actually make the changes you want. after i re-did the changes you want the homing works fine now AND THE BED STAYS UP when i send a print. The extruder is still crashing into the stops right away when i send a print job and i dont have any fillament coming out yet.
PROGRESS
Should i swap the fan to an always on port?
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So when i home it, x and y go to 225 and z goes to 0. but if i want -z to go down shouldnt 0 be at the bottom? how would i swap that around, change the motor direction like you suggested in your last post?
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@agent0810 said in Homing advice:
Should i swap the fan to an always on port?
No, swap the hotend fan and the part cooling fan plugs.
@agent0810 said in Homing advice:
but if i want -z to go down shouldnt 0 be at the bottom?
No, 0 is when the nozzle is touching the bed and +Z means the bed is going down as the print gets taller. It's a bit different with a bed that moves in Z as opposed to a bed that stays put and the nozzle raises. But think of it as the print gets bigger as the nozzle and bed get further apart. The print starts at 0 and grows.
@agent0810 said in Homing advice:
The extruder is still crashing into the stops right away when i send a print job
So the print head isn't moving around the center area of the bed? But you can jog the print head around the entire bed area without problem?
and i dont have any fillament coming out yet.
Double check your extruder wiring. Which driver are you connected to?
If you remove your filament and then send
M302 P1to allow cold extrusion you should then be able to use the extrusion dialogue to move the extruder motor back and forth. Does that work? -
swapped the fan plugs and now the front one is on.
so when i do home all, everything goes to where it is supposed to but the z is at 0 at the top, so it cant go lower right? shouldnt it home at 300 something? im having issues moveing the bed.
when i send a print the print head crashes for a bit, then it goes around like its printing but no fillament comes out.
Ran the M302 P1 and nothing happened.
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@Phaedrux
when i hit z+ it tries to go up right now, and its already at the top from homing. -
@agent0810 said in Homing advice:
the z is at 0 at the top, so it cant go lower right? shouldnt it home at 300 something? im having issues moveing the bed.
+Z should move the bed down. If that's not the case, we need to change the direction of rotation of the z motor like we did with the X Y.
;drives M569 P2 S1 ; physical drive 2 goes forwardsChange that to S0 and test again that +z moves the bed down.
@agent0810 said in Homing advice:
when i send a print the print head crashes for a bit,
That could just be it homing again because there is a G28 in the start gcode. If it's already at the endstops it will back off slightly and then home again. Then it will try and do the prime line part, and then start the print. So as long as it ends up moving around the center area of the bed I think that's ok.
@agent0810 said in Homing advice:
but no fillament comes out.
Ok we need to see if the extruder motor is actually working. After you send
M302 P1that allows the extruder motor to move without being heated up. So if you have removed the filament you should be able to test the motor by sending extrude commands from the web interface. -
the extrude and retract buttons are greyed out on the web interface even after the M302 P1 command
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How bout if you heat up the hotend to 180?
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@Phaedrux got it up to 160 and now i can retract and extrude
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@Phaedrux
M120 M83 G1 E10 F300 M121
Warning: Tool 0 was not driven because its heater temperatures were not high enough or it has a heater fault -
@Phaedrux
at 180 seems to be working. i can see it moving -
Alright, so at least we know the extruder is moving and extruding now.
Next you should go through the extruder calibration to set the correct steps per mm.
https://duet3d.dozuki.com/Guide/Ender+3+Pro+and+Duet+Maestro+Guide+Part+4:+Calibration/40#s165
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@Phaedrux said in Homing advice:
https://duet3d.dozuki.com/Guide/Ender+3+Pro+and+Duet+Maestro+Guide+Part+4:+Calibration/40#s165
so retract is pushing out filament and extrude is pulling it back......
