#4028 Fan Config, updating from VCore 3.1 to new Toolhead V1.0 with RatOS 2.1

16 messages · Page 1 of 1 (latest)

gleaming heron
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I am reusing my old 4028 fan from a rig bought 2022, installing it into the new Toolhead V1.0, and upgrading my firmware to OS 2.1.
So far everything good, but I think my fan type does not work with the stock settings:
I have the Blue PWM pin connected to the EBB42 1.2 toolboard, and the power pins wired to the Octopus 1.1 board.

The problem I'm having is that the fan runs, but only when set to 100%, any other percentage and it stays off.

Normally not a huge issue, but the noise is making me lose my mind.
Thanks in advance!

kindred zealotBOT
#

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hollow sphinx
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upload your debug.zip please

gleaming heron
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Excuse my ignorance, how do I get that? Are they the klipper logs?

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This is my old config file, from before the rebuild, if it helps

📎 printer.cfg
hollow sphinx
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change in your printer.cfg

[fan]
cycle_time: 0.00004

to

[fan]
enable_pin: PB11

the cycle_time is already defined in RatOS.cfg

gleaming heron
gleaming heron
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I've double and triple checked the pinout

AP1GczMMROKxKwagSBrXnGEZwbpGYwGRhTqsYHBGjrd55WMeRVLl7ZySYpK83Aw1920-h896-s-no-gm.png
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If the fan is old or incompatible, I'm also fine to change it

open thunder
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Finding out exactly what fan you have requires some tool head disassembly, but go for it?

gleaming heron
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I've put in an order for a Mechatronics 4028 24V Fan (MH4028H24B1+6-RSR), if that is not immediately compatible, I'll see if I can find the specs to the old one I have assembled

hollow sphinx
gleaming heron
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I've now hooked up the Mechatronics fan, jumpered to 24V, and it behaves the same way as the fan I have installed: no movement 0-99%, switches on at 100%

#

pretty stumped here, am I perhaps missing some step in setting up the EBB that is controlling the PWM signal? I bought these directly from the manufacturer, so it has the stock settings

gleaming heron
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Instead of banging my head against the wall on this, I decided to wire PWM to the Octopus, and carry the weight of the extra wire