Hello! My school received a gMax 1.5 dual-extruder printer about a year ago. It came preloaded with an outdated version of Marlin. This firmware is not configurable for 2 extruders so I tried upgrading to a newer version of the Marlin firmware. I actually found a version specifically for a gMax 1.5 dual-extruder, however we still couldn't manually control or print with the second extruder.
So we found out that the Repetier Firmware is commonly used for dual extruders. After some research, we configured Repetier and uploaded it to the printer. We think this is a great firmware and would be really easy for other students to use! Unfortunately, we encounter a couple errors that I haven't been able to solve:
1. The entire system freezes when we try to home a single axis or all axes from the LCD display. I think this is directly related with the second problem below.
2. None of the stepper motors move. As I said in problem 1, using the LCD for anything relating to moving a stepper freezes the system. When I use the host (Mac version), I can manage to control the printer because I can see the printer's responses on the LCD display. If I tell a stepper to travel a certain distance, the printer says "IDLE". I have no idea what to do to get the motors to move. When I click "Stop motor", the LCD prints "MOTOR DISABLED", as I think it should.
3. We get a "HEATER DECOUPLED" error when we try heating more than one extruder at a time. I know that the first extruder will independently heat perfectly.
Any help would be appreciated! Thanks!
