Last night I was able to do a very fine PEC analysis and generate
a waveform for the MK II RA worm/gear set I recently hobbed.
I had cautiously hoped the 2nd worm gear would be a slight improvement
on the PE of the MK I gear as I had done a few things different in the
machining sequences. I knew which errors were the biggest contributors
after many months of watching it and measuring MK I perform on the sky.
Also,
in a testament to just how good the seeing was last night (and hopefully
tonight), I usually can only stack about 250 from 300 frame sets.
These two results are a stack of EVERY frame in a 550 frame set for the star field
and EVERY frame in a 302 frame set for Miaplacidus/NGC2822.
Not only that....the 2822 shot has NO GUIDING and PE turned OFF
The star field shot has NO GUIDING and PEC turned ON.
Do you think I was a little bit pleased with this worm gear?
some pics of the changeover:
Pic 3: old pair on the left, new on right
Pic 4: damage I found on the cork clutch face.
Pic 5: dismantling the worm carriage to add the new worm.
Pic 6: made a new bush for the non-thrust end.
Pic 7: in mesh and testing play.
Pic 8: up and running.
Steve