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General Mach Discussion / Re: Odd Startup Behavior
« on: December 08, 2007, 09:04:32 AM »
This sounds to be a fault with the driver card for the x axis (probably the dir input) which seems to be faulty until it gets warmed up.
Try swapping the inputs with those of the Y axis, and see if the fault moves too - this will tell you if it is the card.
I can't see what else it can be, I assume you have set up your config/port and pins correctly with active low or not as is the case and you do not change these.
If you are using a breakout board with some sort of buffer on, then it might also be the breakout board that is passing the wrong signal until it warms up. If you have a digital tester you can see what the input is and if the card is behaving as it should.
Try swapping the inputs with those of the Y axis, and see if the fault moves too - this will tell you if it is the card.
I can't see what else it can be, I assume you have set up your config/port and pins correctly with active low or not as is the case and you do not change these.
If you are using a breakout board with some sort of buffer on, then it might also be the breakout board that is passing the wrong signal until it warms up. If you have a digital tester you can see what the input is and if the card is behaving as it should.