7321
General Mach Discussion / Re: Stepper motor working in 1 direction only!
« on: March 15, 2011, 09:09:35 AM »
Hi David,
Welcome to the forum.
I have not actually used the XL25 I am just going by the manual but it would seem that the XL25 inputs should be connected;
Pin 1 to computer LPT pin 2
Pin 2 to computer LPT pin 3
Pin 6 GND
Pin 7 GND
And mach configured (active high) something similar to attachment (it is not usual to use Pin1 of the computer LPT port for step and direction signals)
Now this should work but it is not the preferred way to do it because the computer’s LPT port can sink more current than it can source. Either (a) connect Pins 1 and 2 of the XL25 through current limiting resistors to +5 volts and use pins 6 and 7 as active low inputs from the LPT port pins 2 and 3 or (b) use an active breakout board which can provide the TTL level signals to the XL25 without loading the LPT parallel port.
Tweakie.
Welcome to the forum.
I have not actually used the XL25 I am just going by the manual but it would seem that the XL25 inputs should be connected;
Pin 1 to computer LPT pin 2
Pin 2 to computer LPT pin 3
Pin 6 GND
Pin 7 GND
And mach configured (active high) something similar to attachment (it is not usual to use Pin1 of the computer LPT port for step and direction signals)
Now this should work but it is not the preferred way to do it because the computer’s LPT port can sink more current than it can source. Either (a) connect Pins 1 and 2 of the XL25 through current limiting resistors to +5 volts and use pins 6 and 7 as active low inputs from the LPT port pins 2 and 3 or (b) use an active breakout board which can provide the TTL level signals to the XL25 without loading the LPT parallel port.
Tweakie.