Based on OpenFL’s config values it looks like the laser power in mW is controllable by the printer. It also seems the recommended max power is 62 mW.
I have two Form 1+'s with dead lasers (both started flaring) so I am in the process of trying to source a new laser for the machines that are cheap enough. So far finding 100 (ish) mW 405 nm lasers hasn’t been all that hard. I should even have control over the max current via a pot on the driver board of at least one of my selections. What I don’t really know is what the “max” current of the laser should be and how the Form 1/1+ tries to modulate the overall laser power. If I had to guess I would say it likely uses PWM to pulse the laser but I’m not sure.
My other question regarding the laser is how large the dot should be. I imaging both a larger dot and smaller one than expected would be a problem. Since the new laser is focus-able as opposed to the set optics of the lasers FL ships, I will have control over this.
Regarding what I have bought to attempt to swap in…
This is what I want to avoid, too expensive but it has some useful stats.
Early attempts at figuring this out led me to this:
Which has arrived and at least works in the sense that my Form 1+ can drive it. However I believe (just comparing it to my flaring laser) that it is wildly too weak (it is, <10mW) to be useful. This is an oversight on my part, don’t know how I missed that when I bought it.
Second attempt was this: https://www.aliexpress.com/item/32809148986.html?spm=a2g0s.90423184.108.40.2060e4c4dOR3Flc correct wavelength, still too weak, might be too low voltage, probably not even going to try it.
Ok the real two lasers I want to try:
(that’s the first one), basically I boguth the Sony diode that matches what ppl here on the forum claimed was used by the Form 1+, and in order to make that work I ordered the holder and a driver I hope will work. This diode should be the correct wl, power, voltage, etc. but there’s still some unknowns, namely can I get the focus I need, can I dial in the max power correctly, etc.
I also found this (second real option): https://www.civillaser.com/index.php?main_page=product_info&products_id=727&gclid=Cj0KCQiAjfvwBRCkARIsAIqSWlNi-0lIXWDQCanOOsk4BTS1vOKLGfJGPRMDAGl_2vPHVDK-HFNQK4MaAm78EALw_wcB
Which is a pre-built module with the right wl and power. I don’t know if I can adjust the max current, but at least I know this will come with a driver that will work out and there’s minimal work to do on my part. Mostly just solder on the FL leads and shim the laser so it fits in the 15mm galvo clamp. That and figure out how to adjust the current.
I guess my questions are:
- Am I crazy for attempting this?
- How does the F1 control laser power dynamically?
- What is the “max” current / power allowed through the F1+ laser?
- Does anyone know how large the dot is suppose to be or how I would even really measure that other than trial and error? (140um??)
- Anything I’m missing here?