Machine: Custom Built (Layzor) from K40 parts: PSU version 1
I am Brand-Spanking new to Laser-cutting – but have years as maker and ( 3d Printer, CNC enthusiast etc.)
When I enter a new technology I build rather than buy so that I get to know the ins-and-outs and that way I don’t have any external dependencies for maintenance of the machines I build.
Building my first laser cutter is my 2020 Covid project.
I purchased a K40 off of craigslist. Stripped it of it parts. Built my frame using the Layzor (https://manmademayhem.com/layzor/). I have tossed the digital control panel in favor of the Cohesion3d Laserboard, with the LCD display. When I discarded my digital control panel I lost my test fire button, so I am doing my test pulses via the LCD display. ( I no longer have a test fire button). Additionally, I have added an air assist, beefed up the exhaust, added a coolant system via Chillipad.
I have setup my new device on Lightburn.
I have the mechanical movement working as expected.
I have my limit switches working as expected.
I have my machine homing properly.
I have already installed an AMP meter.
I am just about through aligning + centering my mirrors. (still have both eyes.)
Come to realize from readings on this site that I would be well suited to add a 10 Turn Potentiometer 100K Ohm. I think. That’s on order should be arriving shortly.
Come to realize from readings on this site that I would be well suited to add a kill switch to the lid.
Come to realize from readings on this site that I would be well suited to add a kill switch in the way of a flow meter. That’s on order should be arriving shortly.
So I have some general questions, stemming from not having a baseline of expectations yet.
The 10 Turn Potentiometer 100K Ohm (https://www.amazon.com/gp/product/B07D8QGF87/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1). any issues with this model?
The wiring diagrams are clear enough to make an attempt at the wiring. But what I am trying to understand, if I do add a potentiometer the intention is that this potentiometer should control the MAX laser output, and I can use the AMPs traveling through the laser to gauge if the knob turns are working.
If my understanding of #2 above is correct – Does the PMW signal that would be output by the Laserboard, would that be applied as a (multiplier to the analogue). (Eg. If the Potentiometer is set to let 80% of power through, and then I set the Lightburn to burn at 50% – then the laser should output at about 40% power. Is that the correct baseline of understanding?
Would I be better to add the the LID kill switch to de-activate the Laserboard or the PSU?
Would I be better to add the the Flow Monitor kill switch to de-activate the Laserboard or the PSU?
Should I add a test fire button or just keep using the test fire capability in LCD Display menu?
Can we control the length of the test fire from the LCD Panel. Mine seems to be set to like 5 sec / or I can keep it on. I would prefer to limit the test fire via the LCD panel to a shorter timeframe. Is this configurable somwhere?