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Author Topic: DEC stepper doesn't like the South ...  (Read 3054 times)

GigiG

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DEC stepper doesn't like the South ...
« on: January 13, 2015, 16:47:43 »

Hi, I have a problem with the DEC stepper control. No response from the motor if I hit the South button in the EQASCOM interface even with the Slew command from CdC. The stepper work well only with the North commands. I tried to swap both the 8825 boards and the steppers but the behaviour is the same. May be something broken on my Mega board, like defective pins? May I try to use different pins for the DEC and reassign them in PinMappings.h? I think I could try to compile the code with avrdude.
Gigi

EDIT:
I checked the board after swapping the DEC and RA pins on the board but the problem persist on the South command ...
it's not a board pins issue

EDIT2:
Further test. After connecting the EQASCOM driver the RA stepper is powered but the DEC not (I can easily rotate the shaft). After a North movement command the motor is still powered but if I press the South button the shaft make a very slight 'click' and doesn't move. The stepper became again UNpowered.

EDIT3:
Solved. The digital pin 8 of my MEGA2560 clone is defective. Changed the EN-1 of the DEC driver to pin 9. Now works perfectly.
« Last Edit: January 15, 2015, 18:40:05 by GigiG »
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TCWORLD

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Re: DEC stepper doesn't like the South ...
« Reply #1 on: January 15, 2015, 20:09:09 »

I somehow missed this post completely, sorry about that. Glad you managed to find the issue though! :)
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Tom Carpenter (AstroEQ)