Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: fer_mayrl on June 23, 2006, 05:02:45 PM

Title: parallel port pinout
Post by: fer_mayrl on June 23, 2006, 05:02:45 PM

Hello,
I just received some stepper drivers,  and they have step + and step - as well as dir + dir - terminals,
I bought a paralel cable, and cut off one terminal as to get the 25 wires and be able to wirle a couple of ground terminals (pins 18 to 25) to the negative step and dir terminals, to my surprise the cable only had signal wires and the cables for pins 18 to 25 are missing, could I wire the - step and dir terminals to the shield of the cable?
Any ideas?
Regards
Fernando

Title: Re: parallel port pinout
Post by: Brian Barker on June 23, 2006, 05:48:58 PM

You may not need Step - and Dir - ... Check the drive data for "Open end Connection"

Title: Re: parallel port pinout
Post by: fer_mayrl on June 23, 2006, 06:06:25 PM

Thanks Brian,
But the driver manual does not say anything about open end connection.
Would It work if i use the shield of the cable to connect to the negative step and dir?
I know it would work if you connect pins 18 to 25 to one of those terminals.
Regards
Fernando

Title: Re: parallel port pinout
Post by: fer_mayrl on June 23, 2006, 07:43:40 PM

Ok,
I found a parallel cable with all 25 wires, used ground pins (18 to 25) on the negative terminals, and as expected... it works
Thanks Brian
Fernando

BTW, these drivers are the chinese drivers that connect to 110v ac, so no need for power supply, at that voltage they put out about 135volts DC, and they max out at 7.5amps(dip switch selectable),, and the stepper motors are a mamoth 37 Nm holding, and weigh about 45 lb each.

Title: Re: parallel port pinout
Post by: Brian Barker on June 23, 2006, 10:08:41 PM

You have a link ???

Title: Re: parallel port pinout
Post by: fer_mayrl on June 23, 2006, 10:17:06 PM

I think I had already posted it... www.ms-motor.com they come from china