Re: [CAD_CAM_EDM_DRO] Lathe Speed Control

Hi Bob,

You have to be careful as the wires that connect to the pot are basically at
mains potential. A "Digital pot" is unlikely to be isolated, and mat result in
mains potential entering your PC via the printer port.

Not a pretty sight. Then again.... it is a bit of a firework show.

Seriously, the DigiSpeed was designed to do exactly what you are after. It
produces an Isolated DC control voltage that replaces the manual speed
potentiometer on such motor speed controllers. It will work with Mach3 or
TurboCNC.

Have a look at:

http://www.homanndesigns.com/DigiSpeedXLDeal.html

Cheers,

Peter.

stcnc2000 wrote:

> Hi,
> I have Baldor DC motor adjustable speed controller, that has a speed
> pot.
> I have a 3 in 1 lathe that i want to control the speed for Constant
> Surface speed (CSS).
> My question is would it be possible to change that speed pot to a
> Digital pot and control it with Mach 3 Turn or Turbocnc4? Is there
> another
> way to use the Baldor speed controller with Mach 3 Turn or Turbocnc 4?
>
> Thinkcnc
> Bob A
> http://stcnc.tripod.com/
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www.homanndesigns.com/ModIO.html - Modbus Interface Unit
www.homanndesigns.com/DigiSpeedDeal.html - DC Spindle control
www.homanndesigns.com/TurboTaig.html - Taig Mill Upgrade board