Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: routermaker on May 01, 2020, 03:49:09 AM

Title: Feed Rate FRO% control with potentiometer pedal PLEASE ADVISE
Post by: routermaker on May 01, 2020, 03:49:09 AM

Hi Folks,
This is my third Mach3 machine build but I need a slightly out of the ordinary solution.

I want to build a little 2 axis turning machine for wrapping wire on a mandrel at a varied pitch.

I would like to control the feed rate (via FRO%) using a foot pedal.  I found a sewing machine pedal that is a simple potentiometer that uses a 3.5mm headphone jack (max 15V) that I want to use. I suppose could read the voltage via arduino if necessary but then what?

Can anyone suggest the best method for this? For instance is there a analog read capability built in to a basic BOB? 

I want the pedal to go from 0% FRO with no foot and 250% pedal to the metal.

Any help greatly appreciated!!!!

Title: Re: Feed Rate FRO% control with potentiometer pedal PLEASE ADVISE
Post by: ZASto on May 01, 2020, 04:38:56 AM

just do a google search on "mach3 arduino modbus"

Title: Re: Feed Rate FRO% control with potentiometer pedal PLEASE ADVISE
Post by: joeaverage on May 01, 2020, 06:31:01 AM

Hi,
the Pokeys 57CNC and the UC300 both have analogue inputs.

Craig.

Title: Re: Feed Rate FRO% control with potentiometer pedal PLEASE ADVISE
Post by: routermaker on May 01, 2020, 02:25:56 PM

Great! Thank you so much for the spot-on replies.  I saw the UC300 and thought it looked promising. 

Can anyone outline how the analog input maps to the feed rate?

I want to use the analog input signal as a set-point, i.e. voltage mapped to a given FRO%. 

Are "Brains" and Modbus understandings both necessary components to executing?

Can anyone give me a basic roadmap of what I need to set to learning?

Thank you.