Old Meade 1206 Electric Focuser

[Gary Fritz]

I have a Meade 8" LX90. I recently purchased an old Meade 1206 electric focuser. My knob is just a little bit to small for the electic focuser to fit on. I need to increase the diameter of my know by a few millimeters or decrease the inside diameter of the gear ring that fits over it.  I was thinking of something like a spring collar 

My knob has a diameter of .0865", the focuser is designed for the 0.975" diameter knob.

Does anyone have any ideas?

Has anyone else run into this problem before?

 

 

[Knighty2112]

Have you tried putting some gaffer tape around the knob to bring it up to the same diameter at all? If your only talking a small amount this might be enough to do it as long as the retaining screw for the focuser on the shaft is able to be secure enough. 

[Grotemobile]

A piece of thin 1" or so tubing, is what U need. Just make a slot in it.  

[r3i]

Perhaps wrap something like insulating tape?

Interestingly I used to have an LX90 and also got a 1206 focuser for it but I had the problem in reverse in that the focus knob was slightly thicker than the collar on the motor.  A few minutes with some Emery paper on the collar sorted it out.