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Weird issue! Stepper motor runs when I touch IC!!!

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Hi,

I'm in process of getting electronics ready and thought I will check if the motors run properly
I have uploaded bootloader & firmware (splinter) on Sanguinlolu 1284P
I placed polulo driver for X & Y. Connected thro' pronterface & it said connected. Wen I tried to move X axis motor it didn't. I accidentally touched the lower half of Atmega 1284P and motor moved! Wen I removed my hand it stopped. Weird still wen I touched the polulo driver it rotated even faster
This happens only for the Xaxis motor output. If I connected the same motor to Y axis terminals & touch Atmega 1284P or driver it doesn't rotate
Not sure wat is the issue. Atmega 1284P or driver or firmware. Btw X axis rotates only wen touch and keep on turning and none of the motors respond to pronterface commands

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