Confused as uasual

[wcarrothers1]

On my mill I have 250 CPR servos. That are steped down by half 2:1 gearing to the 5 turns per inch ball screws.

I have the steps per set to 10,000 I think and run a max In pr at around 50 (not a problem as the mill should not move to fast anyway)

On the gantry my Y has 500CPR's and is drect drive so the save Steps per value works since there is no gearing so steps per is still 10000. But Mach seems to limit my velocity to 150 In per.

Is that limit based on my CPU speed or something?

If I swap one of my 250cpr incoders in for the Y I can bring the steps per down to 5000 and can crank the In Per up to around 250ish. Much higher then that my gecko's will stop running faulting out..

Any ideas?

I'm wondering if I should not have gotten 500cpr's for the Y and Z which are direct and a 250cpr for the 10:1 geared rack (using the 1" pitch diameter gear)..

No matter which incoder I use on the X when jogging with my dial incoders X is really gittery unless I have the MPG settings tuned to shoot for max speed really fast. Smooth as silk when keyboard joging and such..

Maybe I just have something screwed up in Mach

Anywho..

Should have the table on shortly so Should have more pics and be cutting this weekend..

b.

[project5k]

i know there there is a limit in the demo of mach, but i dont remember what it is...

and i would think that cpu speed, and port speed could be limiting factors...

[wcarrothers1]

Got my mach3 from camitronics so should be a full version..

Only running a P3 355mhz machine.. That will probably not change for quite some time..

[project5k]

that might be part of the problem... i'm running a 2gighz machine, and i'm hitting the demo limit....

[wcarrothers1]

Well I paid for the full version of mach when I got my motors from Camitronics and such the first time around.

Course the software came on a burned CD so who knows.

Anyone know of a way to tell if ya have a full version licence or something else? That I know of mine does not have any "Demo" type splash screens or anything.

b.

[project5k]

see if it will RUN more than 1000 lines of code, that, and the speed limitation are the only 2 limits that i know of on mach. when i say run, i mean run, not just load....

[wcarrothers1]

I want to say I've run through more then 1000 lines but then again I've never counted them (dam you notepad for not having a line cound in the status bar)..

b/

[GaryCorlew]

go to help and then about, it will tell you if it is registered to you. If it is not then you need to put your license file in the mach directory

[wcarrothers1]

Don't seem to have a problem loading 1000 lines and running it on my laptop (same copy as on my cnc machine)

Course now that I think about it I don't get limited on my 2gig laptop setting the Max speed to higer then 150 while I have my steps per set to 10000 Course my laptop limit looks like 270 ipm limit when you try to max out the speed.

So I guess the machine speed plays some part in the max. Darn.. Guess I will have to upgrade in order to jog faster... Pretty sure I will never actually cut at faster then 150inchs..

b.

[wcarrothers1]

Thanks gary.. Looks like my name is right at the top.. I'm guessing Dave (camitronics) stuck it in there when he cut my disk..

Anywho.

b./

[wcarrothers1]

OK here is the question..

my mill xyand z have 250cpq incoders on it.

I suppose in theory I could swap those with the ones on my router mill. If I did that I would have to double my steps per to 20,000 to deal with the double amount of incoder. That will take my max speed for the mill for x and y down to ~100ipm. And I'd be able to move up to ~300 on the gantry.

the size of the mill is small and I don't think I ever do much more then 50ipm rapids on it anyway.

But what would this do to my accuracy on either the mill or the gantry?

Hmmm

[wcarrothers1]

I suppose that is the difference of having accuracy of .0001 per inch or .0002 per inch (figure going from 10000 steps per inch to half that of 5000)

Course on the other hand that means the mill would get a possiable accuracy boost of from .0001 to .00005

Hmmm Guess things to ponder...