Hi,
I'm following the commissioning steps here but having a lot of problems;
[reprappro.com]
I should explain I have taken over building this reprap from a friend who ran out of patience after he made it (presumably correctly) but then burnt out several electrical components because he didn't set the current limits. He replaced the main chip on the Sanguinololu board, and I have replaced the hot end resistor with a heating element and the thermistor in the hot end. He may have changed the firmware as well but I don't know. I have a feeling that might be the issue because I can't see anything wrong with the wiring (though neither me nor him are good with electronics).
Anyway, the problems: I got the printer connected to my laptop running windows 7, connected the power and started testing the motor movement. All the motors move except for the y-axis. I've tried swapping it to the x plug and the motor works fine there. A more immediate problem however is that as soon as the power is plugged in the bed and hot end start to heat up, even though they are set to off in pronterface. I try to set lower temperatures and nothing happens, the temperature just keeps rising (correctly reported in the pronterface UI). I've checked the wiring on the thermistors and I can't see anything wrong. Polarity seems fine on the heated bed as well.
When I first plug in the printer I think I can hear a whining sound, like a motor straining, and an orange LED lights up on the heated bed board. Has anyone got any ideas about what might be going on? I was getting a MINTEMP error until I corrected the wiring of the heated bed, now it's been replaced with this overheating problem. I can't leave it connected for long because I think if I let it get too hot something will be damaged.
I'm following the commissioning steps here but having a lot of problems;
[reprappro.com]
I should explain I have taken over building this reprap from a friend who ran out of patience after he made it (presumably correctly) but then burnt out several electrical components because he didn't set the current limits. He replaced the main chip on the Sanguinololu board, and I have replaced the hot end resistor with a heating element and the thermistor in the hot end. He may have changed the firmware as well but I don't know. I have a feeling that might be the issue because I can't see anything wrong with the wiring (though neither me nor him are good with electronics).
Anyway, the problems: I got the printer connected to my laptop running windows 7, connected the power and started testing the motor movement. All the motors move except for the y-axis. I've tried swapping it to the x plug and the motor works fine there. A more immediate problem however is that as soon as the power is plugged in the bed and hot end start to heat up, even though they are set to off in pronterface. I try to set lower temperatures and nothing happens, the temperature just keeps rising (correctly reported in the pronterface UI). I've checked the wiring on the thermistors and I can't see anything wrong. Polarity seems fine on the heated bed as well.
When I first plug in the printer I think I can hear a whining sound, like a motor straining, and an orange LED lights up on the heated bed board. Has anyone got any ideas about what might be going on? I was getting a MINTEMP error until I corrected the wiring of the heated bed, now it's been replaced with this overheating problem. I can't leave it connected for long because I think if I let it get too hot something will be damaged.