Can Extruder pins are use to ON/OFF Solenoid valve??

allankisaiswaroop · 24 May 2018, 07:44

Hi guys,

I want connect solenoid valve to extruder motor pins like in ramps we can do on/off by extruder motor driver pins which are DIR and ENABLE. and connect to the L293D driver where I can give GCODE from Slic3r. Now I moved to Duet board so how can I operate solenoid valve. Please help me in this.

dc42 · 24 May 2018, 08:04

The recommend way to drive solenoids is to use spare heater or fan outputs. The fan outputs are rated at 1.5A and on Duet PCB versions 1.02 and later they have integral flyback diodes. The heater outputs are good for about 6A but have no integral flyback diodes.

allankisaiswaroop · 24 May 2018, 09:51

hi dc42,

thanks for reply. but this I am using for chocolate printing where it is a pneumatic based extrusion. in that i want to ON/OFF solenoid valve. In my case I cannot use fan pins . please help in this.

dc42 · 24 May 2018, 09:55

@allankisaiswaroop said in Can Extruder pins are use to ON/OFF Solenoid valve??:

hi dc42,

thanks for reply. but this I am using for chocolate printing where it is a pneumatic based extrusion. in that i want to ON/OFF solenoid valve. In my case I cannot use fan pins . please help in this.

This command https://duet3d.dozuki.com/Wiki/Gcode?revisionid=HEAD#Section_M571_Set_output_on_extrude may do what you need.

allankisaiswaroop · 24 May 2018, 10:07

hi dc42,

I am asking that my printer is a paste extruder. I am using pneumatics to drive the chocolate from syringe to the bed. and for bed I am using peltier setup where i can change in the middle of printing. Now I want to operate solenoid valve on/off for that i want to use extruder motor pins. please help me

dc42 · 24 May 2018, 15:33

@allankisaiswaroop, you don't need to use the extruder output pins to control the valve, see my previous reply.