Cool, I think that is what I have. I guess that if we set the limit at 3.0V, then any voltage above is clamped there. That would mean we can't read temperatures below 80 degrees.
While my Due is out of action, I thought I would look at the Mega. The pins from the heatbed connector and extruder 0 collide with the top of the USB connector on the Mega. I really wouldn't like to use it like that, even if there is insulating tape. The FD does not sit properly on the headers, and it would be too easy for the pins to puncture the tape.
The only safe way I would use this is if the headers on the Mega were taller to allow clearance, or we leave a large keep out area around the USB connector (which RAMPS almost does).
We have a bit of space which we could move the extruder 0 connector clear, but the heatbed connector would need to move in at least 6mm, which would be a pretty extensive change I think.
Unless anyone can think of better options, we might have to reluctantly say that RAMPS-FD is not suitable for the Mega, at least not out of the box. I've seen some pretty cheap Due clones ($36), so maybe it is not so much of a problem.
While my Due is out of action, I thought I would look at the Mega. The pins from the heatbed connector and extruder 0 collide with the top of the USB connector on the Mega. I really wouldn't like to use it like that, even if there is insulating tape. The FD does not sit properly on the headers, and it would be too easy for the pins to puncture the tape.
The only safe way I would use this is if the headers on the Mega were taller to allow clearance, or we leave a large keep out area around the USB connector (which RAMPS almost does).
We have a bit of space which we could move the extruder 0 connector clear, but the heatbed connector would need to move in at least 6mm, which would be a pretty extensive change I think.
Unless anyone can think of better options, we might have to reluctantly say that RAMPS-FD is not suitable for the Mega, at least not out of the box. I've seen some pretty cheap Due clones ($36), so maybe it is not so much of a problem.