Hi, I built new RepRap Prusa i3, but I have problem with printing.My prints still fails after sucessfull printing of first layer. On second layer my extruder suddenly starts to extrude less and less material and hobbed bolt starts overslipping more and more on filament, so filament stops moving. Then I always have to clean hobbed bolt... I also tested more types of extruder springs without success. I tested temperatures from 235 to 265°C, but no change. If I try to extrude filamenet manually in RepetierHost on 240-250°C it works absolutely fine, I can extrude for example 10cm of filament easily and without any problems/slipping. Extruder steps are also calibrated ok (on extrude 1cm commad it extrudes exactly 1cm of filament). I attached photos of first layer and hobbed bolt after fail... Parameters: Extruder: Greg's Wade extruder Hotend J-Head nozzle 0.5mm (for 3mm filament) Filamnent: ABS Firmware: latest Marlin Electronic: RAMBo https://reprap.org/forum/read.php?262,327482,327482#msg-327482 Sat, 09 May 2026 18:33:32 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?262,327482,327662#msg-327662 https://reprap.org/forum/read.php?262,327482,327662#msg-327662
I had issues stripping on the first layer because the gap between the bed and nozzle was too tight.]]> randyf1965 Printing Thu, 20 Mar 2014 12:39:36 -0400 https://reprap.org/forum/read.php?262,327482,327659#msg-327659 https://reprap.org/forum/read.php?262,327482,327659#msg-327659 The otherthing I would see, is bed filament.. too soft.
Could be to much pressure on the compression bearing and sinking the filament in the hobbed bolt.

did you try to pass the filament by hand ? see if there is a restriction in the head.. (also had that problem before)




just my 2¢ but could be the problem.]]> Rigor_M Printing Thu, 20 Mar 2014 12:36:32 -0400 https://reprap.org/forum/read.php?262,327482,327589#msg-327589 https://reprap.org/forum/read.php?262,327482,327589#msg-327589 dpalo Printing Thu, 20 Mar 2014 08:42:59 -0400 https://reprap.org/forum/read.php?262,327482,327586#msg-327586 https://reprap.org/forum/read.php?262,327482,327586#msg-327586 randyf1965 Printing Thu, 20 Mar 2014 08:36:29 -0400 https://reprap.org/forum/read.php?262,327482,327482#msg-327482 https://reprap.org/forum/read.php?262,327482,327482#msg-327482
I built new RepRap Prusa i3, but I have problem with printing.My prints still fails after sucessfull printing of first layer. On second layer my extruder suddenly starts to extrude less and less material and hobbed bolt starts overslipping more and more on filament, so filament stops moving. Then I always have to clean hobbed bolt... I also tested more types of extruder springs without success.

I tested temperatures from 235 to 265°C, but no change. If I try to extrude filamenet manually in RepetierHost on 240-250°C it works absolutely fine, I can extrude for example 10cm of filament easily and without any problems/slipping. Extruder steps are also calibrated ok (on extrude 1cm commad it extrudes exactly 1cm of filament).

I attached photos of first layer and hobbed bolt after fail...

Parameters:
Extruder: Greg's Wade extruder
Hotend J-Head nozzle 0.5mm (for 3mm filament)
Filamnent: ABS
Firmware: latest Marlin
Electronic: RAMBo]]> dpalo Printing Thu, 20 Mar 2014 03:59:39 -0400