Homing.....totally confused

[chrisb691]

Hi all,

I'm having some trouble understanding the homing/limits setup. My BIG problem, is trying to figure out where X0Y0 is supposed to be (specific to a gantry router).

If I stand at the front of my machine (as per picture), I was trying to set X0Y0 to the top left corner. I can set this up okay, and the DROs all work correctly. However, when I set a work offset (G54), Mach seems to want it's X0Y0 at the bottom left corner of the work. When I do this, +Y goes in the right direction, but +X goes the wrong way. So if you load the Roadrunner, the tool comes off the work when it traverses X. Am I supposed to be setting home at bottom left?

If someone with a gantry machine can explain, it would probably help me save some of the little hair that I have left. A screenshot of your homing/limit screen would be very nice too. :D

I went onto the Vectric site today, to purchase Cut2D. They are using an exchange rate of 0.56, compared with current 0.669. I tried to order in US$, as Paypal is using the correct exchange rate, but they are still trying to bill me in AU$. This adds AU$43 to the cost :((. I've sent them an email, and hope they will fix the issue before I continue with the purchase. I haven't found an alternative site to purchase from, so I might be stuck with a crap rate when I buy.

Thanks for any help.

[Greolt]

Chris

I just tried the Vectric site and it appeared to let me pay in UK pounds.

Using UK pounds seems to be a better deal at the moment.

Regarding X and Y origin,

It does not matter what side of the machine you decide to think of as the front.

Once you decide that, then the X and Y origin is at lower left, or closest to you and to your left as you stand in front of it.

Going by your pic, as you stand in front then the direction that the whole gantry moves, towards and away from you is the Y axis. Zero closest to you and going in a positive direction as it moves away.

The spindle moving along the length of the gantry is the X axis. Zero when all the way to your left and going in a positive direction when moving to your right.

If using home switches, convention has them at the zero end of travel but with Mach they can be at either end, does not matter. Just another setting.

If it would help PM me we can talk by phone.

Greg

[chrisb691]

:-:-:-:-:-:-:-

Thanks Greg,

Silly Muggins here, had X & Y transposed in his mind. :duh:

I've reconfigured, and it makes sense on the screen. I'll plough on again, and see how I go. Thanks for the offer of the phone talk, I might take you up on that down the track.

I'll have another look at Cut2D in Pounds sterling.