For what I am doing I merely need to make multiples of the same object at the same time.
The design started as a single tube with a working area of ~51" wide and a passthrough for length. Later I decided to add a second head/tube and follower setup to make doubles during the same cycle.
My plan was to use the one pwm to feed both laser power supplies when in “duplicate” mode and have a switch on each to interrupt one or the other depending on need (one side cut through fine but the other needs another pass). The size of the machine is simply because I can, and I like having room to grow. I didn’t see why one pwm couldn’t feed two psu’s being it’s just a signal and the mini I have now could be used for a printer which would be WAY more effort to drive a hot end via pwm. Not sure about the newest board but if I have to, being the mini is out of stock. I can pull the one I have for the new machine and put a laserboard in the machine I have now.
If I need to utilize the full bed for a large piece I’d turn off the right laser, disconnect the bar connecting the two heads, and slide the loose one out if the way. Only one head will be connected by belt the other is just a follower.
I’m still deciding on if there is a real benefit going 150 over 100 for what I do and it would be merely for thicker things in the future. I already have a 6x10 hybrid cnc plasma/router table so no need to go bigger for that reason. For cutting the router will blow the laser away. Looking to see if I can find other benefits.