Re: 6 steppers

["Matt Shaver" <mshaver-at-erols.com>]

> From: Till Franitza <xfa-at-isw.uni-stuttgart.de>
> I am trying to drive 6 Steppers with the EMC.
> 4 work an 2 donīt.
> I suppose this is because the pins for stepper 4 and 5 (5th and 6th) are
> electrically different from the others. I read they are open collector LS
TTL.
> When trying to measure the voltage of pin 1, that is suposed to carry dir
> signal of motor 4, i received nothing at all.

Connect a resistor (1000 - 10000 ohms is a good value) from the open
collector pins on the parallel port to +5Vdc from the PC's power supply. Take
the step and direction outputs from the parallel port pins as before, only
now they will switch from +5Vdc to 0Vdc as you would expect.

Matt