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Found 1 result

  1. Version 1.0.0

    521 downloads

    I was having trouble getting my enclosure temperatures above 45C to achieve my optimum print settings. This is the solution I came up with to solve my enclosure temperature issues. I'm running a Fystec Spider v1.1, so your printer config would likely differ. I'm also using a Hartk v4.0 PCB that has an integrated chamber thermistor. I've included my settings for this as well, but you may need to change this up if you use a different thermistor for enclosure temperature readings. I hope this is helpful for someone. I couldn't find a lot of solutions out on the net that could get me up and going with a setup like this, so it was a lot of trial and error to get to this point. Let me know if you have any comments or suggestions that can help me make this thing better! How I set things up: I removed the fan from the PTC heater and inserted a 100K NTC thermistor into one of the bordering fins on the heater core. I then filled the remaining gap in the fin with thermal grease and reattached the fan. I added a thermal fuse to make sure the power would get cut if the temperatures get out of hand from a bad config or faulty piece of hardware. First I drilled a 1/8" hole next to the center ground pin, rivetted the fuse to the heater's core, and applied thermal grease between the fuse body and the heater core. I then moved the ground wire to run from the fuse rather than the tab. Once I wired this up, I ran the temperatures up past the fuse limits to verify things fail safely as expected. I then replaced the fuse after test failed as expected. I extended all of the wiring with solder connections to make sure it would be long enough reach each wire's intended destination, and capped each connection with heat shrink. I mounted the PTC heater to the printed PTC heater mount and ran the wires to the wiring compartment. I installed the Omron relay, and ran a 24v output from my controller to the relay's 5-24v input. I then routed 110v AC to the other end of the relay on the hot lead. I finished up the wiring by hooking up the 12v line for the heater fan and the heater thermistor to the controller board. (Note: my chamber thermistor was already installed on my toolhead's PCB) I updated my printer.cfg and ran a bunch of tests on the heater to make sure it was functioning properly. BOM: Electronics: - PTC Heater w/ Fan x1 - Item on Amazon - NTC 100k thermistor - Item on Amazon - 120C Thermal Fuse - Item on Amazon - Omron 5-24v Relay - Item on West3D Printed Parts: - Printed PTC Heater Mount x1 Miscellaneous: - M3x8mm SHCS x2 - M3 T-nut x2 - 18awg stranded wire ~2 meters - 22awg stranded wire ~2 meters - 1/8" Rivet x1 - Appropriate connectors for you controller board Changes to printer.cfg: ###################### ### Chamber Heater ### ###################### [heater_generic chamber_heater] heater_pin: PC8 sensor_type: Generic 3950 sensor_pin: PC2 control: watermark max_power: .5 min_temp: 0 max_temp: 110 [verify_heater chamber_heater] max_error: 120 check_gain_time: 120 hysteresis: 5 heating_gain: 2 ########################## ### Chamber Heater Fan ### ########################## [heater_fan chamber_heater_fan] pin: PB6 max_power: 1.0 heater: chamber_heater heater_temp: 40.0 # fan will turn off below this level ############################# ### Enclosure Temperature ### ############################# [thermistor chamber_thermistor] temperature1: 25 resistance1: 10000 beta: 3950 [temperature_sensor enclosure_temp] sensor_type: chamber_thermistor sensor_pin: PC1 min_temp: 0 max_temp: 80 Macro: You can run this and immediately start your print. The print wont actually start until the specified chamber temperatures are reached. [gcode_macro CHAMBER_TEMP_WAIT] gcode: {% if params.MIN_TEMPERATURE and params.MAX_TEMPERATURE and params.MIN_TEMPERATURE|float > params.MAX_TEMPERATURE|float %} {action_raise_error("Chamber Temp Wait: MIN_TEMPERATURE must be less than or equal to MAX_TEMPERATURE Use: - CHAMBER_TEMP_WAIT MIN_TEMPERATURE=[0..80] - CHAMBER_TEMP_WAIT MAX_TEMPERATURE=[0..80] - CHAMBER_TEMP_WAIT MIN_TEMPERATURE=[0..80] MAX_TEMPERATURE=[0..80]")} {% elif params.MIN_TEMPERATURE and params.MIN_TEMPERATURE|float > -1 and params.MIN_TEMPERATURE|float < 81 %} {% if params.MAX_TEMPERATURE and params.MAX_TEMPERATURE|float > -1 and params.MAX_TEMPERATURE|float < 81 %} TEMPERATURE_WAIT SENSOR="temperature_sensor enclosure_temp" MINIMUM={params.MIN_TEMPERATURE|float} MAXIMUM={params.MAX_TEMPERATURE|float} {% else %} TEMPERATURE_WAIT SENSOR="temperature_sensor enclosure_temp" MINIMUM={params.MIN_TEMPERATURE|float} {% endif %} {% elif params.MAX_TEMPERATURE and params.MAX_TEMPERATURE|float > -1 and params.MAX_TEMPERATURE|float < 81 %} TEMPERATURE_WAIT SENSOR="temperature_sensor enclosure_temp" MAXIMUM={params.MAX_TEMPERATURE|float} {% else %} {action_raise_error("Chamber Temp Wait: invalid usage Use: - CHAMBER_TEMP_WAIT MIN_TEMPERATURE=[0..80] - CHAMBER_TEMP_WAIT MAX_TEMPERATURE=[0..80] - CHAMBER_TEMP_WAIT MIN_TEMPERATURE=[0..80] MAX_TEMPERATURE=[0..80]")} {% endif %} Updates: - I added a photo of how this is wired up in the wiring compartment. The boxes with the text in the photo represent the components of the heater that are in the chamber of the printer. - I have included the macro to wait for chamber to reach temps before starting a print. - I have attached the heater mount's fusion 360 file for others to be able to easily make edits to the chamber heater mount Chamber Heater Mount v2.f3d
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