I have Russ’s head, ‘rack & pinion’ and tube/mirror mount on mine. I like it very much.
Don’t get too excited with the ‘high’ speeds, your stock machine is probably capable of ‘out running’ your lps response time.
I’ve had mine up to 1650mm/s, great fun, but pretty useless, as far as I can tell. If you’re trying to do something, you need to keep the reality (physics) of what’s going on in perspective.
Lps are rated at 90% power <=1mS. Assuming the 1mS, the fastest it can respond is
1s/1000 =1ms… or you can do 1000 dots in one second.
1650mm/s is about 60 inches/s.
With a lousy 64dpi I’d have to put down 60inches * 64 dots = 3,840 dots, about 3.8 times faster than the supply can respond.
At 256dpi it’s 60 * 254 = 15,240 dots or over 15 times faster than it can respond…
What does it do when it’s driven faster than it can respond? I’m pretty clueless here, if you know any technical details, please tell us all… 
I’ve set my pwm period to 1mS and the power at 50%.
At 500mm/s you get a brown line… At 1000mm/s you get a brown ‘dashed’ line… Speed and frequency allow you see the on/off of the pwm. Again, great fun, but not real helpful in life.
The real advantage is, my acceleration is up around 60,000mm/s^2 so very little overscan compared to the big original head. Spends more time working than changing direction.
Ease of alignment, this is a no brainer for anyone that’s dealt with the original Chinese machine… all of us.
Easy to swap lenses/tubes/nozzles.
I believe it runs cooler and more quiet, but have no supporting data, just a ‘hunch’.
One of the few heads that vertical alignment is made possible even with a bad table. I have a sloppy table, which makes the Z alignment difficult at best…
These need to be renamed back to the original format, which here is dxf.
mk2 targets and 3mm holder.dxf.txt (68.3 KB)
No drag chain. Reduces mass on both axes.
All details for lightweight head design .dxf.txt (411.1 KB)
ALL PARTS AND ASSEMBLY DIMENSIONS .dxf.txt (2.0 MB)
Lenses, tubes… similar to @CadJoe lens diagram.
Here ‘was’ his price list, don’t know if it’s changed.
Rack & Pinion side…
If you wish to pursue this, send me a pm and I’ll send you his email.
There is virtually no support from cloudray. These are Russ’s designs and he will help you.
I had an alignment issue and he re-designed it and sent me the parts/dxf via the ‘post’… even offered to his help via the phone.
Can’t say enough about him or what he’s done for the laser users in general.
