[SOLVED] MPG help

thanks a lot John, I'll give it another shot when i get back on Tuesday.

Success!

The thing works great. Thanks for all your help guys.

Here is a picture of the setup.

I'm still confused on the mux 4 business, and I can't get my .1, .01, .001, .0001 to do what i want... it also doesn't seem to jog with the wheel in those increments. but at least its a start.

Thanks,
A

post your last HAL file.and we'll check out mux4.
How is your selector switch wired?

Chris M

Ok, here is the latest hal (it could use a little cleaning, sorry).

There were a couple of tricks to getting the encoder to function. I had it leaching legacy power for a universal power supply inside the box that i use for relays and general power, it fluxuated from 4.5-5.2 VDC. I switched it to the mesa power supply which puts out a reliable 4.78 VDC. I don't know if the encoder circuit on the MPG is sensitive to fluctuating power, it shouldn't be, but i did that anyway.

I changed the .ini to have four encoders instead of three, which appeared to be key. I was using the 3 axis servo example provided with the emc build on dapper drake.

And lastly, I stared at the hal file until it worked.

The mux4 is the only thing that is misbehaving. I have two switches on the unit, one three way, and a four way. The three way is fully functional and has X, Y, and off. (there is no z on this machine). The other switch is .1, .01, .001, .0001. This switch behaves oddly. I have a ground going to the pole, and four GPIO pins going to the .1, .01, .001, and .0001. Mux4 seems to accept only two pins? you can see in my hal that i attempted to have it use all four, but it failed.

Thanks again for the help guys,
A

To use your selector switch with a mux 4 you must multiplex the switch connections
Probably pretty easy using some diodes....or
If you use mux8 you could get three jog speeds with out multiplexing the switch connection.
I was gonna say mux16 (for four speeds) but that is only in the developer version yet....

Ok, its all good. Fully functional. i have .1, .01, .001, and .0001 . Here is a copy of my final and cleaned hal file. I ended up using a 3 pole 4 position switch to get what mux4 wanted (off-off, off-on, on-off, and on-on), which is probably overkill, but it was quick and cheap to setup.

yay.

Thanks for the help.