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feed rate, oem button

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Author Topic: Mach 4  (Read 476 times)

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Mach 4
« on: December 23, 2018, 07:13:31 AM »
I have just installed Mach 4 with the IP-M controller.
And now I have 2 questions
1. I have installed a potentiometer for the feed, when I turn it also changes the feed rate on the screen but not the jog, you can change that.
2. I can not find any settings for OEM switches eg. Start-Stop break.

Re: Mach 4
« Reply #1 on: December 23, 2018, 01:49:08 PM »
1) Yes you can do this, note that typically the jog rate and the feed rate are separate. If you wish to link them you can use this API:

LUA Syntax:
rc = mc.mcJogSetRate(
      number mInst,
      number axisId,
      number percent)

Set the jog rate of the given axis as a percentage of the axis' maximum velocity.

You could write a small script in the PLC script which would then continuously cause the jog rate to be the same or some fixed percentage of the feed rate.

2. I can not find any settings for OEM switches eg. Start-Stop break.

OEMs are a Mach3 term and do not occur in Mach4 at all. You need to read the manual:
Mach4 CNC Controller
Lua Scripting Guide

found in the Docs folder of your Mach4Hobby directory, particularly section 5.1 page 18. You will find that Mach4 signals
are handled in a different manner to Mach3, in particular they are not polled as in Mach3 and consequently lend themselves to treatment
in a Signal Library Table. Understanding how the Signal Library Table works is a major breakthrough in your understanding of Mach4
and a perfect example of the 'function as a first class value' programming paradigm that is offered by Lua. A simple concept.....but Oh so

Thereafter you will find input signal (ISIG_INPUT*********) and output signals (OSIG_OUTPUT*********) listed in the API.chm in the docs folder.
I have attached aof list, I find it useful enough I have put it in the Docs folder as well. There are hundreds of signals defined.

My wife left with my best friend...
     and I miss him!
Re: Mach 4
« Reply #2 on: December 23, 2018, 05:47:48 PM »
thank you