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Author Topic: Setting current limit for Celestron Dual Axis kit (EQ3-2)  (Read 2441 times)

doantuanduong

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Setting current limit for Celestron Dual Axis kit (EQ3-2)
« on: June 03, 2016, 09:26:30 »
Good day everyone,
I have a Skywatcher EQ3-2 fitted with Celestron dual axis kit. Now my friend, an electrician, is attempting to make a DIY AstroEQ circuit for me.
I have read through the tutorial, FAQ and this https://www.astroeq.co.uk/tutorials.php?link=/doku/doku.php?id=currentlimit
I know that for AstroEQ to work on the 6V rated Celestron Dual Axis kit, the current must be limited. However, I have no information on the current limit of the kit motors.
Please help me with how I should set the current limit. The power supply I intend to use with AstroEQ is a 12V power tank.
Thank you all. 
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TCWORLD

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Re: Setting current limit for Celestron Dual Axis kit (EQ3-2)
« Reply #1 on: June 03, 2016, 20:57:16 »
Hi,

You can roughly estimate the current if you measure the resistance of the motor windings. They are rated for 6V, so the current should be roughly:

I = V/R = 6/R

Use that as your current limit.

Alternatively you can use Method 1 - trial and error - to set the limit.

Tom
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Tom Carpenter (AstroEQ)