Home made (easy ? ) MPG

[ecat]

The one thing i want is a real mpg hand wheel that at a touch of a button can go from differant jog speeds , having used these at work i know how handy they are and better than using game pad sticks to jog with.
L8r all

If you take a look at the circuit from the instructables project the guy uses a lm393 comparator to clean up the signal from the diy encoder disk, output pins 1 and 7 connect directly to the mouse chip. For variable jog speed you could place a micro-controller between the lm393 and the mouse chip, add a couple of buttons and a little software and the 'jog speed' could be anything between the maximum encoder resolution and zero :)

Not too tricky and certainly not expensive!

[Buba b]

Ive had a look at the circuit from the instructables and it looks possiable ! being a complete noob with electronics means im not to sure about redesigning / changing the schematic. Im most worried about this comment " add a couple of buttons and a little software and the 'jog speed' " LoL with this being the worst bit "a little software " . This is why a game pad looked so good but im now working my way through Eagle CAD as ive always wanted to have ago at PCB making . Maybe il have ago at the pendant in my link as i got all the schematics and Hex file from the site , shame it didnt have a componet list to make it easy.

[M250cnc]

Buba you can wire an MPG directly to Mach if you have two spare inputs.

I have seen this on the Mach forum and it looks pretty impressive and not that expensive.

http://www.machsupport.com/forum/ind...c,14270.0.html

Phil