GearHeads Forum

Tweakie, did you ever get that RF laser working?  Tried powering it off your jet engine ?

Kirk

Hi Art,

I have never used an F-Theta lens so have no idea of the linearity of scale or the extent of the pincushion distortion but knowing how you eagerly dive into solving mathematical issues I am sure it will all turn out good.

Tweakie.

Hi Kirk,

Yes indeed sir the RF laser is still working OK. It doesn?t get used very often but it offers a good comparison between RF and DC power control from Auggie.

I think the 208Vac, 3 phase from my jet engine would probably be a bit mighty for the 35Vdc of the RF.  ;D

Tweakie.

>>I am sure it will all turn out good.

I wouldnt lay any money on it, but we'll see.

Art

tweakie wrote: I think the 208Vac, 3 phase from my jet engine would probably be a bit mighty for the 35Vdc of the RF.  ;D

This is only single phase but it might work

Kirk

Hi Kirk,

Maybe.  ;D

Tweakie.

We have had a couple of days of snow here in the UK which just about brought everything to a standstill. As a country we seem to be just so unprepared for anything like this. I could not get any collections or deliveries and work was put on hold giving me the opportunity of more playtime with Auggie.  ;D

Tweakie.

Tweakie:

  I think your getting my snow. 
Here, we used to have a normal depth of a couple feet through
the winter, Ive yet to see more than an inch or so, and its gone in
a day.  I kinda like it.

Nice burn. Good grey scale. Im waiting for my theta lens, my galvos
are tuned up to speed, and Im looking forward to some test burns next
week to see just how a galvo with 50 watts on it can look..

Hopefully, I wont be disappointed, but if I am a firestar laser is a good
starting point for a conventional laser engraver..

Art

Hi Art,

I am sure you won?t be disappointed with your galvo performance but, with regard to greyscale, I will be very interested to learn just how speed affects the burn results (reaction time of the material to the laser action).

Tweakie.

Tweaky:

  The math on that is pretty clear for photo engraving, the CNC57 controls the laser every 1ms,
so if I want 800x600 on a photo, Id need to take 800ms to cross the field at a minimum. I could do that fast on my conventional almost, but the saving in galvo should come from having
infinite acceleration and deceleration. (Or thats what Im hoping. )

  And then there is the material burn time, but I suspect with 50 watts Ill be able to move
as fast as a step/dir galvo can.. with the above limitation.

Art