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V-Core 4 4028 Fan - Cannot Get PWM Working
Hello. I have a V-Core 4 that I have been using for a while, no issues. I wanted to solve the issue of the fan running at 100% while the printer boots and such, so I moved the ground pin to a spare heater terminal on the Octopus board and added it as an enable pin.
So what I have now:
V-Core 4, 300. Octopus 1.1 mainboard and EBB42 toolhead board.
4028 part cooling fan comes on when I want it to, not during boot. Great!
However, it ramps up to full speed and just stays there. So something is wrong with the PWM signal.
Wiring:
Blue wire (on the Nidec fan, it's supposed to be the PWM wire) routed to the toolboard, bound to PA0 (fan 1). The negative port on that terminal
Red wire goes to the positive on Fan7 on the Octopus, with the jumper set appropriately
Black wire goes to HE1's negative side, bound to PA3
Config in my printer.cfg, in the user overrides:
[fan]
pin: !toolboard_t0:PA0
enable_pin: PA3
cycle_time: 0.01
I have tried 0.00004 as the cycle time as well, no dice there. Do I need to route everything to the octopus board instead of having it hit the toolhead board? I redid all of my connections - recrimped the JST's for the toolhead. Just at a loss as to what's going on.
So what I have now:
V-Core 4, 300. Octopus 1.1 mainboard and EBB42 toolhead board.
4028 part cooling fan comes on when I want it to, not during boot. Great!
However, it ramps up to full speed and just stays there. So something is wrong with the PWM signal.
Wiring:
Blue wire (on the Nidec fan, it's supposed to be the PWM wire) routed to the toolboard, bound to PA0 (fan 1). The negative port on that terminal
Red wire goes to the positive on Fan7 on the Octopus, with the jumper set appropriately
Black wire goes to HE1's negative side, bound to PA3
Config in my printer.cfg, in the user overrides:
[fan]
pin: !toolboard_t0:PA0
enable_pin: PA3
cycle_time: 0.01
I have tried 0.00004 as the cycle time as well, no dice there. Do I need to route everything to the octopus board instead of having it hit the toolhead board? I redid all of my connections - recrimped the JST's for the toolhead. Just at a loss as to what's going on.
Solution
What I did wiring wise is: red/positive wire to Fan 7 positive port. Black/negative/ground to one of the heater mosfets, PA3 (enable pin in the config) - HE1. PWM wire (blue for the nidec fan. brown for the Sanyo I swapped to) to the negative terminal on Fan 5 (PD15).
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