hot end sometimes scrapes I don't seem to be able to stop my hot end dragging on my print, when it works well it just drags a little but sometimes the first layer will be basicly 0mm tall or the hotend will drag on highere layers so much that it stops the x carnage. I am using a techzone Huxley but with RAMPS with marlin and a jhead (or a Chinese version anyway, but I seem to have got a good one). My software is mattercontrol just doesn't seem to be consistent, sometimes I do the auto print levelling and everything works ok with only a little dragging and the next time I go to print it extrudes with the hotend pressed against the build platform! in this case I have tried winding the z stop up a bit and that helps for the first layer but the hot end ends up dragging a lot and sooner or later caused it to fail. https://reprap.org/forum/read.php?262,369262,369262#msg-369262 Wed, 16 Sep 2026 12:09:05 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?262,369262,382433#msg-382433 Re: hot end sometimes scrapes https://reprap.org/forum/read.php?262,369262,382433#msg-382433 Also, I noticed the x-axis belt was getting more slack than it used to be, causing slipping to occur much more easily. I tightened the belt, added cooling and now my problems are fixed.]]> roady001 Printing Sun, 13 Jul 2014 13:44:13 -0400 https://reprap.org/forum/read.php?262,369262,379233#msg-379233 Re: hot end sometimes scrapes https://reprap.org/forum/read.php?262,369262,379233#msg-379233
Quote
roady001
I have the same problem and I also have a Huxley. My problem seems to happen because some parts seem to get much higher then they should; see attached picture to see what I mean.
I have tried different temperatures but nothing helped. This is PLA b.t.w..

Might this be the same problem as OP?

The lifting at the corners that you are seeing is due to too little cooling. Try a big fan blowing while printing, and it will go away.]]> manton Printing Mon, 07 Jul 2014 00:07:23 -0400 https://reprap.org/forum/read.php?262,369262,372870#msg-372870 Re: hot end sometimes scrapes https://reprap.org/forum/read.php?262,369262,372870#msg-372870 I have tried different temperatures but nothing helped. This is PLA b.t.w..

Might this be the same problem as OP?]]> roady001 Printing Sat, 21 Jun 2014 15:22:47 -0400 https://reprap.org/forum/read.php?262,369262,370135#msg-370135 Re: hot end sometimes scrapes https://reprap.org/forum/read.php?262,369262,370135#msg-370135 Srek Printing Sun, 15 Jun 2014 11:31:54 -0400 https://reprap.org/forum/read.php?262,369262,370105#msg-370105 Re: hot end sometimes scrapes https://reprap.org/forum/read.php?262,369262,370105#msg-370105
I have manualy spun the z axis up in the past but I try to avoid it because that tends to unscrew things and the bed get out of level in relation to the X]]> mrkaras Printing Sun, 15 Jun 2014 09:37:01 -0400 https://reprap.org/forum/read.php?262,369262,369743#msg-369743 Re: hot end sometimes scrapes https://reprap.org/forum/read.php?262,369262,369743#msg-369743 TheTechnicalNoob Printing Sat, 14 Jun 2014 08:36:40 -0400 https://reprap.org/forum/read.php?262,369262,369727#msg-369727 Re: hot end sometimes scrapes https://reprap.org/forum/read.php?262,369262,369727#msg-369727 mrkaras Printing Sat, 14 Jun 2014 07:45:30 -0400 https://reprap.org/forum/read.php?262,369262,369688#msg-369688 Re: hot end sometimes scrapes https://reprap.org/forum/read.php?262,369262,369688#msg-369688 mrkaras Printing Sat, 14 Jun 2014 06:09:01 -0400 https://reprap.org/forum/read.php?262,369262,369636#msg-369636 Re: hot end sometimes scrapes https://reprap.org/forum/read.php?262,369262,369636#msg-369636 TheTechnicalNoob Printing Sat, 14 Jun 2014 04:02:58 -0400 https://reprap.org/forum/read.php?262,369262,369293#msg-369293 Re: hot end sometimes scrapes https://reprap.org/forum/read.php?262,369262,369293#msg-369293 mrkaras Printing Fri, 13 Jun 2014 09:32:35 -0400 https://reprap.org/forum/read.php?262,369262,369283#msg-369283 Re: hot end sometimes scrapes https://reprap.org/forum/read.php?262,369262,369283#msg-369283 You would hear if your motor was skipping steps, even when the current was super low [basically nothing, but not dead zone of pot] it's always been really obvious to me my motors are skipping steps. I can hear it in another room [some lost sleep, but at least I could catch it before it wasted too much plastic]. Now other motors and setups may be different.
I would tune your bed manually and see if that helps. Could be a whole other problem, like I said, I've no real knowledge about auto leveling.]]> MrDoctorDIV Printing Fri, 13 Jun 2014 09:14:56 -0400 https://reprap.org/forum/read.php?262,369262,369272#msg-369272 Re: hot end sometimes scrapes https://reprap.org/forum/read.php?262,369262,369272#msg-369272 mrkaras Printing Fri, 13 Jun 2014 08:52:22 -0400 https://reprap.org/forum/read.php?262,369262,369267#msg-369267 Re: hot end sometimes scrapes https://reprap.org/forum/read.php?262,369262,369267#msg-369267 Have you properly calibrated your e-steps and extrusion multiplier?]]> MrDoctorDIV Printing Fri, 13 Jun 2014 08:36:16 -0400 https://reprap.org/forum/read.php?262,369262,369262#msg-369262 hot end sometimes scrapes https://reprap.org/forum/read.php?262,369262,369262#msg-369262
I am using a techzone Huxley but with RAMPS with marlin and a jhead (or a Chinese version anyway, but I seem to have got a good one). My software is mattercontrol

just doesn't seem to be consistent, sometimes I do the auto print levelling and everything works ok with only a little dragging and the next time I go to print it extrudes with the hotend pressed against the build platform! in this case I have tried winding the z stop up a bit and that helps for the first layer but the hot end ends up dragging a lot and sooner or later caused it to fail.]]> mrkaras Printing Fri, 13 Jun 2014 08:30:09 -0400