Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: Holzwurm56 on September 13, 2023, 06:42:37 AM

Title: How many I/Os can I use with Mach3?
Post by: Holzwurm56 on September 13, 2023, 06:42:37 AM

Hello,
how many I/Os can i use with one lpt-port and Mach3? I control my lathe with Mach3 and normally i need the
following I/Os: endswitch x+, x-, z+ and z- all on one input, 2xmpg = 4inputs, index one input, e-stop one input,
2 steppermotors 4 outputs, mainspindle on one output. Total: 4 outputs and 7 inputs. Is this possible with
one lpt-port? What I/Os can i use as input or as output.
Thanks
Hans

Title: Re: How many I/Os can I use with Mach3?
Post by: Holzwurm56 on September 13, 2023, 06:44:10 AM

I mean 5 outputs.

Title: Re: How many I/Os can I use with Mach3?
Post by: Tweakie.CNC on September 13, 2023, 07:26:28 AM

The LPT Port has 25 pins…
Pins 18 to 25 are GND
There are 5 Inputs – Pins 10 to 13 & 15
There are 12 Outputs – Pins 1 to 9 & 14, 16, 17

If you really require 7 independant Inputs then you will need to add a second LPT Port or better still use an external motion controller such as, and just for example, the Warp9 ESS.

Tweakie.