help with adding Stepper motor focus to the GSO crayford focuser

[doseri]

Hi all

i would like to install a Stepper motor on the GSO crayford focuser for my gso200mm f5 newt.

i research the internet for the best fitting and brand but !!!!!! because i am beginner with astro imaging i did know what to choose ,i need help and guidance for choosing Stepper motor focus system that fit my focuser

[Earl]

Adding a motor focus can be quiet and expensive undertaking, there are several options, Lakeside do a nice one from ianking imaging for a starting point.

http://www.iankingimaging.com/show_products.php?category=168

[kalasinman]

I'm interested in the Rigel systems kit for my 150/750 GSO f5  http://www.scopestuff.com/ss_rnfs.htm

[Dr_Ju_ju]

Well...   If your feeling brave & can handle a bit of DIY, then following this thread http://stargazerslounge.com/topic/218975-arduino-ascom-focuser-mark2/ will take you through building your own....

Being ASCOM compliant, they also have the ability to be fully remote\software controlled.

[Shelster1973]

Or you could always try this thread here for some inspiration.

Links into a nother DIY focuser build.

Have yet to get mine up and running fully yet as still need a project box to house the stepperbee in and the wheel that I had printed would look good on a dumper truck, butnot so great on my scope.  May look at taking just teh centre spindle out as that is round and of a decent enough size to put the band on.

Have tried teh stepper on its own running the driver that was linked through my thread and it works a treat.  This was controlled in BYN (BackYardNikon) and all the step buttons on there worked a treat, so there is no reason to think that it will not work once I connect the stepper shaft to the focuser wheel.  Will be ridiculousy small steps on it as the focuser is an 11:1 on teh fine control wheel and the the stepper motor goes through a 640:1 reduction gearbox.

[Shelster1973]

in fact, ithe reduction gearbox on the stepper motor may even be more than that.....nope...my bad...am out by a factor of ten.  Is a 64 reduction on the gearbox.  Still will be fine enough once going onto the fine focuser control

[rigelsys]

I'm interested in the Rigel systems kit for my 150/750 GSO f5  http://www.scopestuff.com/ss_rnfs.htm

Here's the motor install instructions.  Shows the DC motor, but STEPPER can be added the same way.