开云体育

You may remember that not long ago I replaced the Losmandy gearboxes on my
G11 (which had seen better days) with McLennan gearboxes. All I was able to
say at the time about possible improvements was that they were a LOT
quieter.

Last night was the first opportunity I've had to record the PE data since I
fitted the McLennan gearboxes.

I used PecPrep to record the PE over almost six worm cycles, and the results
were quite excellent - far better that I could have hoped for.

With the original Losmandy gearboxes the results I obtained were quite good:
4.83 arc-seconds Peak to Peak

</g/Losmandy_users/files/David%20Partridge/Before%20PEC%20T
raining.PNG>

The results from last night by contrast were nothing short of outstanding:
1.6 arc-seconds Peak to Peak (RMS 0.33 arc-seconds)

</g/Losmandy_users/files/David%20Partridge/24%20April%20202
0%20PE.png>

This is so good that quite honestly I don't think I'll bother with PEC
training.

Note that I didn't edit the PecPrep files to enter the gearbox information
for the McLennan gearboxes (though that wouldn't change the results).

This is using the original worm (not the HP worm) and twin worm blocks,
ABEC-5 bearings, a Belville washer in the block furthest from the gearbox
and the bearing in that worm block lapped to a sliding fit.

Keep well and clear skies
David