Rat Rig Community [Unofficial]RRC[
Rat Rig Community [Unofficial]•3y ago•
49 replies
8Complex

4028 Hookup Sanity Check

Have a SanAce 4028, although I am reasonably sure it's a re-stickered other model. This one seems to only run at 100% or 0% when playing with the speed, so I want to make sure my pins are good and it's really the fan that is the issue.

Fan +12v is hooked to Octopus fan 1 positive (FAN0+) (jumped to 12v)
Fan GND is hooked to Octopus heater 4 pin (PB11)
Fan PWM is hooked to EBB 36 fan signal (PA0)
Fan Tacho is hooked to EBB 36 unused pin (PB7)

Code in printer.cfg:
[fan]
pin: !fan_part_cooling_pin
cycle_time: 0.00004
tachometer_pin: toolboard:^PB7
tachometer_poll_interval: 0.0005
enable_pin: !toolboard:PA0

[output_pin 4028_POWER]
pin: PB11
value: 1
shutdown_value: 0


As a side note, I have hooked this fan to an old printer directly to the fan port with the +/- wires and I was able to regulate it down to about 30% easily, which seemed to be very slow.
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