Prusa Core One / One+ Convection Mod
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for this kit you will need 2 50mm fans + GPIO "Hackerboard"
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- Prusa Parts & Upgrades
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- Open Community License v1
This is my vesion of convection mod for the Prusa Core One / Core One+
Hardware needs:
2 50mm 24Volts fans
1 GPIO "Hackerboard" set.
8 M3x16 screw
1 MOSFET driver 0-24V 3,3V ( it is use to control 24V via GPIO output)
In my case I have found a Mosfet dual driver module from an old Arduino project.
I have use this extra hardware, but you can use every alternative you like:
Gcode mod
On start G-code inter this aftet:
{if chamber_minimal_temperature[initial_tool]!=0}
; Min chamber temp section
M104 S{idle_temperature[initial_tool]} ; set idle temp
G1 Z10 F720 ; set bed position
G1 X242 Y-9 F4800 ; set print head position
M262 P7 B0 ; set pin 7 as output
M264 P7 B1 ; set pin 7 to hight/on
on end G-code add
M262 P7 B0 ; set pin 7 as output
M264 P7 B0 ; set pin 7 to low/off
Asap I will update the installation manual.
If you use the fans without a cover under the heatbed you may cool heatbed more than you heat it, here you can find a mold for a silicone cover.