Display custom fan value as percentage

[briankelly]

Feature Request: Allow custom fan value to be displayed and set as a percentage instead of raw value

Problem Description

The print head fan on my ender-3 v3 ke is displayed in mobileraker as a raw pwm value (e.g. 101.5 out of 255). It shows up as a percentage in fluidd and guppyscreen, and it would be easier to see this as a percentage in mobileraker.

Proposed Solution

Display value as a percentage (0-100%) and allow it to be set the same way.

Alternatives Considered

I can manually set the pwm value in the current app, but it makes me work.

Additional Context

Attached screenshot.

[briankelly]

@Clon1998 Is there a way in a config file in mobileraker or moonraker to force the app to recognize that this is a fan?

I'm wondering if there's a server-side workaround to make the app work properly with fan percentages.

[Clon1998]

Hey, sorry for my late response.
Can you share a screenshot of fluidd of the fan in question?

Regarding a trick. There is a scale param in the klipper config section of the output_pin. MR will pick up the value shown there. I assume it is currently set to 255. https://www.klipper3d.org/Config_Reference.html#output_pin

I currently have no printer with a output_pin, therfore can you share the klipper config section of that pin?

[briankelly]

Hmm. scale is already in my printer.cfg, but MR doesn't treat it as fan. fan0 is the fan that we're talking about here. (nozzle_fan is automatically controlled (on or off) when the hotend is >60C)

[output_pin fan0]
# this controls the two fans around the nozzle
pin:PA0
pwm: True
cycle_time: 0.0100
hardware_pwm: false
value: 0.00
scale: 255
shutdown_value: 0.0

[heater_fan nozzle_fan]
# this is the single, small fan atop the heatsink
pin: PC1
max_power: 1.0
shutdown_speed: 0
cycle_time: 0.010
hardware_pwm: False
kick_start_time: 0.100
off_below: 0.0
heater: extruder
fan_speed: 1.0
heater_temp: 60.0

And here's what it looks like in fluidd. When I change the percentage you can see the pwm value correctly being updated in the console.

[Clon1998]

Fluid is grouping fans and outputs in the same card. While MR has fans card and an outputs/Leds card.

Fluid also always only allows percentages, or has a mapping for 255->perc.

I think I currently have no such mapping. It might be worth to consider it, if scale is either 1 or 100. Since by default Klipper offers a way to set the value of a pin between 0..1 and the scale just offers a way to display it differently/ use the set command with a different scale.