I upgraded to RAMPS 1.4 today. I noticed that the print cooler (connected to D9 / extruder 2) is always running.
It runs at the same speed, no matter what I set in S3D.
In Marlin I set #define MOTHERBOARD BOARD_RAMPS_14_EFB so it should be able to control the hotend, fan and bed.
Measured with a voltmeter, it gives me a reading of 5.9V on D9 constantly.
Thanks in advance
Edited 1 time(s). Last edit at 03/07/2017 02:45PM by Royce.