Hi guys! I have a couple of Prusa i3 working perfectly. Then, I decided to upgrade one of them with a dual extruder set. I have tried to mount two hotend aparts each other x-axis of 24mm. • Firstly, I tried to use 2 x Universal 1,75mm – 0.40mm nozzle E3Dv6, both of them of course with cooling fans. Results: filament slip everytime after a few minutes. Tried from 185ºC to 230ºC but temperatura is not the issue as filament flow fine if I push it by hand. This was using bwoden extruders with a MK drive. • I though it would be because this drive system and I installed two Wade extruder but bwoden system. Results: filament slip everytime after a few minutes. • Then I decided to change using 2 x j-Head hotends 1,75mm 0.35mm nozzle. Results: filament slip after a few minutes even trying to print at 225ºC. Finally, I though it can be a firmware feedrate issue or something else I can’t find.. I attached on slic3r screenshot of my Hephestos printer printing at 32mm/s with an awsome quality!! And also I attach a Simplify3D screenshot of dual system trying to print speeds that is always slipping filament at that veeeery low speed: 8mm/s I also attach a firmware feedrate config.. I really appreciate any kind of help with this frustrating issue. Many thanks to all! https://reprap.org/forum/read.php?1,625353,625353#msg-625353 Mon, 15 Jun 2026 06:57:01 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,625353,625499#msg-625499 https://reprap.org/forum/read.php?1,625353,625499#msg-625499 1 - insufficient idler pressure in the extruder
2 - insufficient stepper current, the stepper motor skips/looses steps. You can see the motor stop turning.
3 - this is rare: actual hotend temperature is less than the what the hardware thinks it is.

If the stepper motor is cold, then it's most likely #2. Stepper motors on all my printers warm up a bit while running.]]> stephenrc General Fri, 12 Feb 2016 13:24:05 -0500 https://reprap.org/forum/read.php?1,625353,625497#msg-625497 https://reprap.org/forum/read.php?1,625353,625497#msg-625497 pikelo General Fri, 12 Feb 2016 13:23:08 -0500 https://reprap.org/forum/read.php?1,625353,625496#msg-625496 https://reprap.org/forum/read.php?1,625353,625496#msg-625496
Your voltage may also be too low. This would result in not enough power being sent to motors.]]> gmckee General Fri, 12 Feb 2016 13:20:00 -0500 https://reprap.org/forum/read.php?1,625353,625490#msg-625490 https://reprap.org/forum/read.php?1,625353,625490#msg-625490
About overheated due too much work, does the motor would be hot? Mines are absoloutly cold..]]> pikelo General Fri, 12 Feb 2016 13:16:01 -0500 https://reprap.org/forum/read.php?1,625353,625485#msg-625485 https://reprap.org/forum/read.php?1,625353,625485#msg-625485 dc42 General Fri, 12 Feb 2016 13:03:57 -0500 https://reprap.org/forum/read.php?1,625353,625353#msg-625353 https://reprap.org/forum/read.php?1,625353,625353#msg-625353
I have a couple of Prusa i3 working perfectly. Then, I decided to upgrade one of them with a dual extruder set. I have tried to mount two hotend aparts each other x-axis of 24mm.

• Firstly, I tried to use 2 x Universal 1,75mm – 0.40mm nozzle E3Dv6, both of them of course with cooling fans.
Results: filament slip everytime after a few minutes.

Tried from 185ºC to 230ºC but temperatura is not the issue as filament flow fine if I push it by hand.
This was using bwoden extruders with a MK drive.

• I though it would be because this drive system and I installed two Wade extruder but bwoden system.
Results: filament slip everytime after a few minutes.

• Then I decided to change using 2 x j-Head hotends 1,75mm 0.35mm nozzle.
Results: filament slip after a few minutes even trying to print at 225ºC.

Finally, I though it can be a firmware feedrate issue or something else I can’t find..

I attached on slic3r screenshot of my Hephestos printer printing at 32mm/s with an awsome quality!!
And also I attach a Simplify3D screenshot of dual system trying to print speeds that is always slipping filament at that veeeery low speed: 8mm/s

I also attach a firmware feedrate config..
I really appreciate any kind of help with this frustrating issue.

Many thanks to all!]]> pikelo General Fri, 12 Feb 2016 07:52:44 -0500