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FAQs / Re: plug and play with old machine?
« on: August 10, 2010, 02:33:34 AM »
Hi Tom,
The standard PC parallel port consists of inputs and outputs (1-9, 14, 16 & 17 are all output pins 10-13 &15 are all input pins and 18-25 are ground).
So by my reckoning you have pins 1,14,16,17 to control the steppers and pin 11 as a feedback / interlock / etsop / whatever - pin 25 is ground.
The active high / low relates to the circuit design of the driver board and can be found by trial and error if it is not previously known.
Here is a link to a typical driver PCB with some setting up instructions which you might find useful. http://www.cooperman.talktalk.net/MDfly.zip
Tweakie.
Quote
why do you think there are only 4 inputs? There are six pins connected to the circuit board is that not 6 inputs?
The standard PC parallel port consists of inputs and outputs (1-9, 14, 16 & 17 are all output pins 10-13 &15 are all input pins and 18-25 are ground).
So by my reckoning you have pins 1,14,16,17 to control the steppers and pin 11 as a feedback / interlock / etsop / whatever - pin 25 is ground.
The active high / low relates to the circuit design of the driver board and can be found by trial and error if it is not previously known.
Here is a link to a typical driver PCB with some setting up instructions which you might find useful. http://www.cooperman.talktalk.net/MDfly.zip
Tweakie.