Wemacro Micromate focusing drive improvement

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Macro_Cosmos
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Joined: Mon Jan 15, 2018 9:23 pm
Location: Andorra la Vella
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Wemacro Micromate focusing drive improvement

Post by Macro_Cosmos »

I promised to write a post on this and I advertised it as "addressing all my woes", kind of smug but I'm happy to say it worked.

Here's before, featuring my "improved stand":
Image

And here's after, no more stand, more space, no need to deal with nylon screws and centring.
Image

A Prior Z-axis focusing drive was used, these pop up on flea sites from time to time.
The adaptation is trivial, I simply figured out the pin-out of the non-standard custom weirdo motor, and made a crude cable.
Image

You can read the full article here: https://macrocosmosblog.wordpress.com/2 ... -part-1-2/
I go through the disassembly process (not needed) and making the ugly looking connector. Part 2 will arrive when the parts I've ordered fly in. Going to make a proper adaptor.

Feel free to correct any errors, I'm sure I've made some regarding to the motor's polarity/direction, and my claim of "lowering controller output current should solve the squealing" is probably wrong... alright just asked someone, it's half wrong. The squealing could be due to excess or lack of current.

Anyway, thanks for reading!

Saul
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Joined: Mon Jan 31, 2011 11:59 am
Location: Naperville, IL USA
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Re: Wemacro Micromate focusing drive improvement

Post by Saul »

This could be useful:
https://is.gd/iFUtR5
It will help with twisted stepper cable, using coarse knob

And I'm using double shaft stepper - it allows you to have fine knob on both sides
Saul
μ-stuff

Macro_Cosmos
Posts: 1119
Joined: Mon Jan 15, 2018 9:23 pm
Location: Andorra la Vella
Contact:

Re: Wemacro Micromate focusing drive improvement

Post by Macro_Cosmos »

Saul wrote:
Sat May 08, 2021 1:59 pm
This could be useful:
https://is.gd/iFUtR5
It will help with twisted stepper cable, using coarse knob

And I'm using double shaft stepper - it allows you to have fine knob on both sides
That little relay coil looking thing is pretty neat! I don't want to add more cables though, I'm going to provide relief by securing the cable on a ring so it won't twist and break overtime.

A common issue with these prior drives are broken ground cables and the cable coming loose, creeping out of the housing. These units can be had for very cheap and the repair only takes minutes. The motor installed is a double shaft type, although there's no access point for the second shaft. I suppose one can drill a hole into the housing and 3D-print a knob, I'm not going through that trouble.

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