Hi Guys,
This grinding machine I've made is much the same as a lathe, X is Ø, and Z is length.
When I'm dressing a profile on a wheel, I need to enter twice the distance for X axis, because it's set to move 1/2 the distance per side, which work out to the correct in Ø.....huh
So if I'm dressing a profile that is 90° included and a small 1.00mm radius on the point, I need to enter the following:

G1 X10. Z-5.
G2 Z-1.41 R1.
X-10. Z-5.

I've noticed that the angles are perfect but the radius always seems to come out alot flatter that it should.
Do I need to compensate somehow for the way I've got it set on X axis (only actually moves in half of what you specify)?
Darc

To get you x axis actually doing the required distance, without having to "double up" then alter the "steps per unit" on config/motor tuning.

If you double that up X will actually move what you say. It might help with the "corner" as well

Thanks for your help jimpinder, if possible I would like to keep it set as Ø.
Whne grinding down a Ø, I think it would be confusing to have to move the wheel in half of what you need to take off.
I'm just a bit fuzzy on how a lathe knows to compensate when doing a radius, I can't help but wonder if there is a setting I've missed.
Thanks
Darc

Mach 3 Lathe will operate in either diameter mode or radius mode.

It is really quite simple - but not, I think what you want.

If you are in radius mode, then measurements on the x axis are treated as a radius and no adjustment is made. If in diameter mode, all measuements are diameters - but the lathe merely divides by 2 before it applies the x axis movement, so that when the cut is made, the resultant diameter is correct.

You appear to be wanting something else - as far as I can see. You appear to want this grinder to go the full distance across the diameter of the face of the work (not half it) - what exactly does the grinder do

It's basically a cylindrical grinder, and we sometimes dress a profile on the wheel.
When you say Diameter mode do you mean there is a proper setting or do you mean just how I have it set at half the steps/increment in motor tuning?

There is a proper setting, I use Dia mode all the time, much better just typing in G1X30 and the tool is at 30mm dia
 Go to Config, Ports and Pins then Turn options.
Hood

Thanks Hood, is it possible to use this setting without using the screen as a lathe style screen.
Is this setting only for the toolpath window to display half of the commanded move?
Darc

I am not sure, I think you will have to use MachTurn but you could make up your own screen. I think if you used a Mill screen when using Turn then you will hit other problems as a lot of buttons etc are mill related.
 Making a screen is fairly easy, I dont particularily like the way the turn screen set is layed out, probably because I was used to a mill type screen layout, I made my own up based on the Mill screen I had made. To be honest my Lathe screenset is not finished, it was just done quickly to allow me to use the lathe,with each use of the lathe  I know what I actually need on the screen and have added some things that werent there and removed stuff that was. When I get a bit of time I will re-do my lathe screenset to exactly suit the way I work.
Hood