Hey all,
I bought a Max that was supposedly running and printing from someone. However, when it got to me it was a bit of a mess but did have a backup Sanguino 1.3a (at1284p) and I suspect it was because the board that was installed was fried (board marked as having bootloaded and firmware preloaded but could not connect through Pronterface and Audrino could not upload firmware). I wired up the other board which turns out had Sprinter pre-installed (assuming stock settings) and at least have proof of life and connect through Printrun and control the motors and access the temp sensors. The heatbed will heat up and turn off fine and the temp is reported correctly. However, the hotend starts heating as soon as the 12v power supply is turned on. Turning it off through Printrun/Ponterface does not turn it off. The sensor reports the proper temp, but I have no control over it - it is basically "always on" and the only way to stop it is to turn off the power supply. I have traced the wiring and verified it is correct.
Any ideas? I'm hoping since I'm relatively new to RepRaps that I might be overlooking something simple, like something that needs to be set in the firmware that can cause this condition, but logic kind of says if the heatbed is responding to On/Off then the hotend should also unless there is something shot with the board or something is shorted.
Thanks in advance!
I bought a Max that was supposedly running and printing from someone. However, when it got to me it was a bit of a mess but did have a backup Sanguino 1.3a (at1284p) and I suspect it was because the board that was installed was fried (board marked as having bootloaded and firmware preloaded but could not connect through Pronterface and Audrino could not upload firmware). I wired up the other board which turns out had Sprinter pre-installed (assuming stock settings) and at least have proof of life and connect through Printrun and control the motors and access the temp sensors. The heatbed will heat up and turn off fine and the temp is reported correctly. However, the hotend starts heating as soon as the 12v power supply is turned on. Turning it off through Printrun/Ponterface does not turn it off. The sensor reports the proper temp, but I have no control over it - it is basically "always on" and the only way to stop it is to turn off the power supply. I have traced the wiring and verified it is correct.
Any ideas? I'm hoping since I'm relatively new to RepRaps that I might be overlooking something simple, like something that needs to be set in the firmware that can cause this condition, but logic kind of says if the heatbed is responding to On/Off then the hotend should also unless there is something shot with the board or something is shorted.
Thanks in advance!