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prashantdshinde
@ Stemer114... how do you control the temparature using slicer/extruder software??
I am using RAMPS1.4, built a seven switch but I am not sure from where to take the +12v supply..... from RAMPS D8 or ext PSU?
the heatbead temperature is monitored via the second thermistor input of sanguinololu board, therefore it can be controlled without any configuration changes and should pretty much work with any firmware and host controller. I am using Repetierhost with Repetier FW and can simply enter the target temperature therein (under tab manual control). This then sends an e.g. M140 S60 command to the printer/firmware. This is independent from the slicer, I only control the heat bed temperature manually.
The idea with seven switch is to keep the heat bed power away from the sangiuno. Sanguino only shares a ground and a signal line with the seven switch for the heatbed. So the 12V for the heatbed should come from the PSU via sevenswitch to the heatbed. YMMV for RAMPS, though..