Messages

31

General Mach Discussion / Re: Dir pin pulsing in one direction, and stable in the other

« on: January 26, 2007, 11:33:45 AM »

Via Eden EPIA SP  1.3G
Runs pulse test fine, not as stable (10usec jitter) as I had hoped but hey it came cheap
XP prof with service packs
Nothing else installed, ran through all the MACH optimizations settings.
network switched off.
The lpt port on this board comes from a VT1211LPC IO chip, companion of the VT8237 south bridge.... if that helps
.
Incidentally has anybody run from a core duo ? yet, as I may be able to get my paws on that. It would be a Commell board


Thanks

JB

32

General Mach Discussion / Re: Dir pin pulsing in one direction, and stable in the other

« on: January 26, 2007, 07:24:36 AM »

Think I checked for that....
Will do so again tonight just to be sure.

it is new hardware, so can't tell if it is the MB doing this or the software.
am also contemplating changing to other pins, just in case

Thanks

33

General Mach Discussion / Re: Dir pin pulsing in one direction, and stable in the other

« on: January 26, 2007, 03:44:05 AM »

Hi Chip

Thanks for info, unfortunately I did not fully check what was going on.
so this morning I put both probes on the signals and found that
depending on the direction, either the step OR the dir pin pulses, the other stays stable.

I am confused now.
should the dir pin be stable either low or high depending on the direction while in motion. and only swap when a direction change happens ?
or do both pulse during motion?

JB

34

General Mach Discussion / Dir pin pulsing in one direction, and stable in the other

« on: January 25, 2007, 05:50:19 PM »

Tried to get stepper drive to work, and found it only runs in the + direction.
When looking at the signals with a scope, I see the step in pulse as is should be in both directions (+ and -)
However the dir pin is stable (low) in the + direction, and pulses in the - direction

Both pulse and dir are set to 15 micro seconds pulse


I bet I will feel silly.....

JB

35

General Mach Discussion / Re: Asigning a 4th linear axis ?

« on: April 24, 2006, 03:22:29 PM »

Sorry Benny for hijacking this thread,
I have a similar question on the Z axis.
The Quill axis on my knee mill (Chinese) is not as good as the Knee axis (both Z)
So in manual times I tend to use the Knee rather than the Quill just to make sure.

So in Mach how would I define Z and Z1 ?
Is the 4th axis used for this ?
Needles to say the axis work in opposite ways

JB