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prusa3d / Prusa-Firmware-SL1

Original Prusa SL1 3D printer firmware
GNU General Public License v3.0
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[Request] Tune LED power #29

Closed tehrealape closed 3 years ago

tehrealape commented 3 years ago

Hey there SL-1 developers,

Due to a recommendation from your customer service team, I am opening this "issue".

I am a PhD candidate from the netherlands, who previously already worked on a Prusa i3 MK2 bioprinter conversion. Next I want to use the SL-1 for the same purpose and have converted the existing printer into a working prototype for biofabrication applications.

However, I have come to a limit optimizing the parameter of the resin-mixture used in such scenarios. A remaining parameter I need to tweak is actually the energy emission from the LED. My measurements have shown me that the printer can deliver about 0.1mW/cm² or 1W/m² of UV light directly at the LCD, which was confirmed by your customer service so far.

My question is simple: Can you help me out on increasing the irradiance level by the LED based on a firmware solution? Would it be an option to make this adjustable (e.g. go from "1W/m2" to "2W/m2" mode) ?

Looking forward for a reply, Nils

filipkotoucek commented 3 years ago

Hello @tehrealape. If custom FW is considered (which will void the warranty), there is only UV PWM value https://gitlab.com/prusa3d/sl1/a64-fw/-/blob/master/sl1fw/configs/hw.py#L143 which can be tuned. The common value should be set around 200 to get the required intensity. This value can be changed up to 250 in FW. But I doubt it will give you twice the irradiance on the display. Current display passes through only few % of the power of the LED. It will be good to use for example monochromatic display instead which passes through few tens of %.

JakubSilar3D commented 3 years ago

Hi @tehrealape , hope the advise above helped. I am closing this issue on that assumption. Feel free to come back if you need more info.