No filament during print

[Brendan]

I am having an issue where no filament is coming out during a print. I have .1mm layer using PLA. The weird thing is, it's not coming out of the hotend but the PLA is moving down into the hotend as I can see from the extruder. I made sure my bowden tube was fully seated multiple times and it's still happening. I can extrude just fine using the software in the home position at 2mm above the bed. Also, my extruder gear that pulls the filament has a lot of shaving from where it's pulling the filament on the gear. Any help would be appreciated. Thank you!

[djarmag]

You might be too close to the build platform. Is the problem happening as it is placing the very first layer? If you cannot see a slight gap between the nozzle and the platform then your filament has no where to go and your extruder will grind because the nozzle is blocked. Try checking your platform has no play in height and redo G29 and delta calibrations

[Brendan]

You might be too close to the build platform. Is the problem happening as it is placing the very first layer? If you cannot see a slight gap between the nozzle and the platform then your filament has no where to go and your extruder will grind because the nozzle is blocked. Try checking your platform has no play in height and redo G29 and delta calibrations

Yes it is on the first layer. I figured having the first layer .1mm from the buildplate wouldn't touch? No i don't see a gap. I appreciate your response. Should I add more to the first layer height?

All responses are appreciated. I only work on this during school so I need ideas if one doesn't work.

[nebbian]

Agree with djarmag, the nozzle is probably too close on the first layer.

Adding to the first layer height won't help, it will be massively overextruded.

You need to tell the printer that it doesn't quite have as much Z max height as it thinks it does. You can do this by decreasing Z max length, or if you have a probe, decreasing the Z probe bed distance.

[Brendan]

Agree with djarmag, the nozzle is probably too close on the first layer.

Adding to the first layer height won't help, it will be massively overextruded.

You need to tell the printer that it doesn't quite have as much Z max height as it thinks it does. You can do this by decreasing Z max length, or if you have a probe, decreasing the Z probe bed distance.

That makes since. So I would go into the EEPROM and change the Z height. Right now it's set to like 402.71 from the auto calib.

[nebbian]

If you're auto calibrating then you have a Z probe, so it's best to also lower the Z probe height as well in eeprom by a small amount. This will mean that when you auto calibrate again, the max Z height will be correct without having to fiddle with it.

[Brendan]

Editing the Z height worked partially. I print fine further back towards the build plate and in the center but when the print comes towards me it axis starts pushing against the bed again causing the filament to grind and have shavings on the gear. This all happens after I run the calib script..

[djarmag]

Maybe your bed clamps are causing multiple warps, do you have 3 or 6 clamps holding them down? Use 3 (every other clamp) and make sure it's not forcing the glass to warp (just snug so there is no noticeable pushing down on the glass and the glass doesn't slide around) and then recalibrate. Also, what are you using for printing? MatterControl/Octoprint? I sometimes have to manually remove and add the same file in MC for the new setting after a calibration.

[Brendan]

Maybe your bed clamps are causing multiple warps, do you have 3 or 6 clamps holding them down? Use 3 (every other clamp) and make sure it's not forcing the glass to warp (just snug so there is no noticeable pushing down on the glass and the glass doesn't slide around) and then recalibrate. Also, what are you using for printing? MatterControl/Octoprint? I sometimes have to manually remove and add the same file in MC for the new setting after a calibration.

I am using 6 clamps and I use MatterControl. Also, when I do the calibration I do the script of course but do I have to do that thing when I first got my printer built and upload the firmware where I put these 10 values into the scale and it gives me new values and I have to upload them into the eeprom. DonI always have to do that after a script calibration?

[djarmag]

Maybe your bed clamps are causing multiple warps, do you have 3 or 6 clamps holding them down? Use 3 (every other clamp) and make sure it's not forcing the glass to warp (just snug so there is no noticeable pushing down on the glass and the glass doesn't slide around) and then recalibrate. Also, what are you using for printing? MatterControl/Octoprint? I sometimes have to manually remove and add the same file in MC for the new setting after a calibration.

I am using 6 clamps and I use MatterControl. Also, when I do the calibration I do the script of course but do I have to do that thing when I first got my printer built and upload the firmware where I put these 10 values into the scale and it gives me new values and I have to upload them into the eeprom. DonI always have to do that after a script calibration?

It may help to use 3 clamps instead so there is less variables in warping the glass plane for each axis and in between axis towers. I recommend using Octoprint over MC so that you can do whatever you want on your PC without interrupting the print. From post assembly it should be upload new firmware-G28-G29-Delta Calibration. Once your have a low deviation (mine shows .02 for example after delta cal) then all you have to do from now on is turn on printer and print. No more Calibration/G29/Delta cal! Don't calibrate unless you have to. (another reason I have been bugging forums about step 1-step x from start to finish)

Here is an example of the quality you can expect from this procedure using the 200mm Bed Level Aid found on thingiverse and forums. This will definitely let you know if your axis needs cal as well as help you tweak retraction and temps to reduce stringing.