Hello, My printer runs a RAMPS 1.4 control board with Marlin firmware. All three (X, Y, Z) stepper motors are working fine, but the printer will not extrude without plastic (just testing the motor). For this test, I disabled "Prevent dangerous extrude" so that I can test at any temperature. The extruder motor is set to a max acceleration of 1000 mm/s, max speed of 100 mm/s, and 670 steps/mm. I tested the extruder motor by plugging it into another axis, so I know the motor is working. Then I swapped motor drivers (A4988), and know that all my drivers are functional. I also tested the extruder motor with my LCD control screen, in case RepatierHost was preventing cold extrusion. Sometimes, the X axis will move (all wires connected where they should be) when I hit the extrude button in RepatierHost. So at this point, I am wondering what else I can try. Any suggestions would be appreciated. Thanks! https://reprap.org/forum/read.php?219,404075,404075#msg-404075 Thu, 16 Apr 2026 06:39:11 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?219,404075,421768#msg-421768 https://reprap.org/forum/read.php?219,404075,421768#msg-421768
Then it finally worked.

I've been up and running ever since.]]> Dave_0160 RAMPS Electronics Sun, 19 Oct 2014 21:24:49 -0400 https://reprap.org/forum/read.php?219,404075,421205#msg-421205 https://reprap.org/forum/read.php?219,404075,421205#msg-421205
I was wondering if you ever managed to find out what was wrong, I am having a very similar problem and have been scratching my head for a while now.

Thanks]]> eardyjim RAMPS Electronics Sat, 18 Oct 2014 14:44:15 -0400 https://reprap.org/forum/read.php?219,404075,404138#msg-404138 https://reprap.org/forum/read.php?219,404075,404138#msg-404138
What version version of the firmware bare you running? I just downloaded the latest from github and no luck. I've seen one suggestion of moving everything to E1 on the ramps board. I might try that next]]> Dave_0160 RAMPS Electronics Sat, 06 Sep 2014 16:00:09 -0400 https://reprap.org/forum/read.php?219,404075,404075#msg-404075 https://reprap.org/forum/read.php?219,404075,404075#msg-404075 My printer runs a RAMPS 1.4 control board with Marlin firmware. All three (X, Y, Z) stepper motors are working fine, but the printer will not extrude without plastic (just testing the motor). For this test, I disabled "Prevent dangerous extrude" so that I can test at any temperature. The extruder motor is set to a max acceleration of 1000 mm/s, max speed of 100 mm/s, and 670 steps/mm. I tested the extruder motor by plugging it into another axis, so I know the motor is working. Then I swapped motor drivers (A4988), and know that all my drivers are functional. I also tested the extruder motor with my LCD control screen, in case RepatierHost was preventing cold extrusion. Sometimes, the X axis will move (all wires connected where they should be) when I hit the extrude button in RepatierHost. So at this point, I am wondering what else I can try. Any suggestions would be appreciated.

Thanks!]]> gajohnson11 RAMPS Electronics Sat, 06 Sep 2014 12:13:38 -0400