1 thermistor sensor to control 4 volcano cartridge heaters
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Is there a way to use 1 thermistor sensor for heaters 3:4:5:6 (on Duex5 board) on Gcode?
Please help
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M950 H3 C"out3" T3 ; create heater 3
M950 H4 C"out4" T4 ; create heater 4 M950 H5 C"out5" T5 ; create heater 5 M950 H6 C"out6" T6 ; create heater 6 M305 P3:4:5:6 T4606017 B5848 C5.548428e-8 R4700 M143 H3:4:5:6 S480 M563 P1 H3:4:5:6 S"DIE" G10 P1 R210.0:210.0:210.0:210.0 S240.0:240.0:240.0:240.0
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@malsager42 said in 1 thermistor sensor to control 4 volcano cartridge heaters:
Is there a way to use 1 thermistor sensor for heaters 3:4:5:6 (on Duex5 board) on Gcode?
Please help
That should be possible if you install the RepRapFirmware 3.0 beta firmware, because in RRF3 you configure the sensors first, then you configure the heaters and specify which sensors they use. However, there is a possibility that the heaters will fight with each other, although you can reduce that by giving all 4 heaters exactly the same M307 parameters and setting them to exactly the same temperature.
What is the total wattage of the 4 heaters? Can you drive them from a single heater output instead? Or from the bed heater output on the main board?
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They are 24V 50w each, so 200w total
also they will be set at the same temperature -
@malsager42 said in 1 thermistor sensor to control 4 volcano cartridge heaters:
They are 24V 50w each, so 200w total
also they will be set at the same temperatureSo that's just over 8A total, which is a little too high for a single extruder heater output. You could connect them all to the bed heater output if it is free, or 2 to each of 2 extruder outputs.
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I have a Duet and Duex connected to each other.
The duex has 5 slots for heaters free on them, can I use them for heating these catridge heaters?
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Although this doesn't directly answer your question, you could run all 4 heaters in parallel off a mosfet board like one that is used to run bed heaters. You would use a single thermistor and single heater output to fire the mosfet and just hook all the heaters up to the mosfet.
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Similar to @jens55 , not the answr you are looking for.. But if you dont intend to use the x5 for anything else you could desolder and disconnect the gate pin from three of the mosfets and link them all to the gate of a fourth. All four mosfets should then switch on the same signal. It's a fiddly SMD soldering job, but not too bad.