Sidewinder X1 after print heatbed cooler

thingiverse

Most prints are significantly easier to remove if the heatbed is cooled down to a temperature of 28 degrees Celsius or less. I designed a heat bed cooler that attaches to the side grille of my Sidewinder. The housing was built with the Sunon 92mm fan (24V) in mind. The three stands fit into the side grille but didn't stay put. To find the correct position, I had to move them around until they were snug. Unfortunately, there are a lot of vibrations from the moving Y-table motion that shake the fan off the Sidewinder housing after some time. To fix this issue, I added a removable clamp to hold the fan in place. The fan is controlled by a relay board that gets its 5-volt control signal from the MKS GEN L board's PIN 35, located in the EXP 2 socket. There are also 5 volts and ground available for the relay board electronics. Cabling: • Connect the +5V, GND, and D35 signal with thin wire to the relay module. • Connect the COM contact of the relay module to one 24-volt output (+) from your power supply. • Connect the NO (Normally Open) out of the relay module to the fan's "+" (red wire). • Connect the black fan wire to the power supply GND. The command I use in my slicer's END-CODE is "M42 P35 S255" for the ON command and "M42 P35 S0" for the OFF command. Between these commands, there must be a command that reads the bed temperature and sets it to 0: • M42 P35 S255 switch ON external fan • M140 S0 switch OFF extruder heating • M190 R28 read bed temperature and wait until temperature is reached • M42 P35 S0 switch OFF external fan If you're using the EXP pins for other things like a LCD display, you can use any other pin that's not being used by any function on the MKS board. You can check this with the command M43, but it's disabled by default in the Sidewinder x1 Marlin 1.0.9 FW. To enable it, modify the Configuration_adv.h file using Arduino IDE: search for M43 and remove the "//". Save the file and make a firmware upgrade. Don't forget to interrupt the TFT display during the upgrade or it won't work. Check with Pronterface or any other terminal software by using the M42 command if you can control the pin. Mounting all together: Insert 4 x M4 nuts into the housing. Use a hot welder tip carefully around the nuts so that the material (PLA, etc.) will melt a little bit and fix the nuts in place. Insert the fan, close the cover, and use 4 M4 screws with a length of 32-33mm. Cut a 35mm screw to 2-3mm. Don't tighten the screws too much! Check the cabling of the fan. Operation: The fan will activate after printing has finished. The display will show 99% done, and the bed temperature set will show 28 degrees Celsius. After the bed temperature reaches 28 degrees Celsius, the fan will be turned off. After that, the bed heating will be set to off ("0") on the display, and the job is complete. MORE information and pictures can be found in the attached PDF document.