surface PWM freq in local.cfg

intelligent-agent / redeem

Firmware for Replicape

http://wiki.thing-printer.com/index.php?title=Redeem

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surface PWM freq in local.cfg #95

Open cdeister opened 6 years ago

cdeister commented 6 years ago

Related to discussion on G+ some time ago: https://plus.google.com/105486978634901788220/posts/R7nkDC4WAQP

I've noticed a resonance with some heater wire that results in a buzz when the board is under high(ish) load. Switch the heaters to on/off mode works, but I think tweaking the PWM frequency a bit would be ideal. On the discussion Elias mentions that manipulating the files themselves will affect the DAC, so perhaps a cfg approach is best?

Gearshredder commented 5 years ago

Might be related, the Fan pwm driver runs at 1khz. Can this be changed out of audible range? 20khz+? I know some fans don't run at this high of frequency even at 100% duty but every 50mm blower fan I throw on this thing is louder than the rest of the printer, even at 0.10a. I'd like to use a 0.24a fan without a whine.