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[NeungAstro]

Hi Tom
I received the equipment of AstroEQ 4.6, ATMega162-16PU and PIC18F14K50-I / P and Parts List of Element14 such as Resistors, Capacitors and various ICs as Tom suggested.
What is lacking is
1. Worm wheel RA, DEC and
2.Stepping motor
As for the Worm wheel, I would like to make a similar version of AstroPhicsic with a 5.9 "Worm wheel, 225 tooth
For Stepping motor, I am thinking of using a closed loop stepping motor motor NEMA 14-17. Is it suitable?
Selecting the motor that Tom had recommended that choose 2 phase Bipolar 6-12V <1.2A / phase
Or it is a stepping motor with a built-in encoder
So I have the following questions:
1. Can I order the Worm wheel 225 tooth to work with AstroEQ?
2. Can stepping motor that I choose to have closed loop?
If it is inappropriate or difficult to do Please advise me too.

Regards,
  Thanom

[NeungAstro]

Those who know help consider Motor
Between these 2 motors, which one is more suitable?
Thank you.

[Zh]

i have like type 1 and they works good but type 2 also must be ok,
Motors are quite different in size and shape so better consider which one is better to mount.

[Victor_M]

The NEMA nomenclature is refering about the size of the motor, not its power of torque, so you have to choose the apropriate motor depending on thr room in your mount and the size of your telescope. For a"normal" telescope I think the smaller motor in your pictures will work fine

[NeungAstro]

Thank you, Victor_M and Zh
Now I'm ordering Small motor.