Can I make this ascom focuser with just these 3 parts? ( assuming also a case and 12v power supply) Then just upload the right sketch and go? I went with the Nema 11. Has more than enough torque and looking to keep weight down. Just going on a little AT65EDQ. http://a.co/fjA1lxt
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Thanks. The Nema 11 27:1 is 670mA. Is that OK. Will just have a tad less going to the motor but it has so much torque I think I can run with a little less. What do you think?
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You have to remember that when both coils are on when stepping that the current = 2x670mA = 1.34A
Higher current = more heat, more strain on stepper motor. This is one of the major reason why we recommend the 400mA motors even though they are heavier and bulkier.
Best case try it and see.
Regards
Robert
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Can I make this ascom focuser with just these 3 parts? ( assuming also a case and 12v power supply) Then just upload the right sketch and go? I went with the Nema 11. Has more than enough torque and looking to keep weight down. Just going on a little AT65EDQ.
http://a.co/fjA1lxt
you need hardware
1. An Arduino Uno with Motorshield
2. A stepper motor
3. 12V supply
4. Motor coupler
5. Bracket
OR
1. Arduino Uno
2. A driver board chip such as DRV8825 or L298N or L9110S
3. A stepper motor
4. 12V supply
5. Motor coupler
6. Bracket
The Nema stepper has to be rated at like 600mA or less, if higher then you will have issues.
Regards
Robert
Thanks. The Nema 11 27:1 is 670mA. Is that OK. Will just have a tad less going to the motor but it has so much torque I think I can run with a little less. What do you think?
Hi Joann
You have to remember that when both coils are on when stepping that the current = 2x670mA = 1.34A
Higher current = more heat, more strain on stepper motor. This is one of the major reason why we recommend the 400mA motors even though they are heavier and bulkier.
Best case try it and see.
Regards
Robert