Modifying a crayford

[Dave_D]

I have one of these:

can anyone see a problem with drilling and tapping a hole close to each of the mounting bolt holes to allow for alignment of the crayford with the optical path? as it is, there's no adjustment to do so. Only needs to be 2 or 3mm dia. Trying to do it with shims has proved 'uncooperative'.

[Peter Drew]

No problem, carry on. 

[Moonshane]

I agree just do it. Maybe add a thin steel plate for the bolts to bear on?

[michaeldurban]

If I understand Nils Olof Correctly...then there is no real need for

the focuser to be 100% square to the OTA..

or is that not what you are trying to achieve..

[Mukv]

Greetings

If the base your drilling is solid then not probs plenty of meat in there to work with.

Andy

[Mukv]

just noticed that the base is flat and not profiled to fit a tube.....the one fitted to my ota is curved to match the radius of the tube wall.

just an obsavation

Andy

[Dave_D]

just noticed that the base is flat and not profiled to fit a tube.....the one fitted to my ota is curved to match the radius of the tube wall.

just an obsavation

Andy

it's radiused, just doesnt show it in that pic

[ollypenrice]

My own modifications of Crayfords have been less charitable and have involved road rollers...

lly

[StevieDvd]

My own modifications of Crayfords have been less charitable and have involved road rollers...

lly

 A bit OTT Olly I have found a good stepper motor is usually sufficient

[Dave_D]

all mods to my focuser completed, just need to clean the focuser up and flock my ota then i can put it all back together no doubt just in time for the end of the clear weather.

[michaeldurban]

oh..ok...I stand corrected in my previous post..

nice work..looks like you've done a pro job !

[michaeldurban]

let us know how you get on with the focuser...

I'm looking at purchasing the same model for my dob..

[Dave_D]

It's a reasonable focuser, certainly not in the same league as moonlights or steeltracks but it does a good anough job