Re: EMC w/steppers & Xylotex

Hi,

> and can not be changes in software. So, you need to build yourself a
> crossover converter.
>
> Tim
> [Denver, CO]

If you installed all of the correct pacakges (deveoper package
during BDI install), you can modify the code to swap the STEP and DIR
for EMC in software to match the usage for the Xylotex drive. I
changed mine in the program that gets compiled into steppermod.o
(select steppermod.o in the ini file too). The C program is:
emcstepmot.c The change is on variable: SmLoByte the 0x01 becomes
0x02, and the 0x02 becomes 0x01. You would then need to recompile:
from /usr/local type in "./compile" (dot slash compile). This
recompiles everything, but it's easier to do than try to separtely
build everything. If you do want to give this a try, let me know,
and I'll look up the specific function that requires the change.

If you are not C programming/linux savvy, then by all means, just
build a cable to swap the pins:

2 = 3
3 = 2
4 = 5
5 = 4
6 = 7
7 = 6
8 = 9
9 = 8

Jeff
http://www.xylotex.com


--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Tim Goldstein" <timg@k...>
wrote:

> I think you will find the problem is that the pinouts for EMC do not
> match that of the Xylotex parallel port cable. Compared to the

Xylotex

> EMC has the step and direction pins reversed for each axis. On EMC

pin2

> is X dir and pin3 is X step. On the Xylotex Pin2 is X step and pin3

is X

> dir. Unlike most modern PC controllers the pinouts on EMC are hard

coded

> and can not be changes in software. So, you need to build yourself a
> crossover converter.
>
> Tim
> [Denver, CO]
> Sherline products at Deep Discount
> Mach1 & DeskCNC with credit card ordering
> www.KTMarketing.com/Sherline
>
>
> > -----Original Message-----
> >
> >
> > I thank you all for the plethora of knowledge you so graciously
> > share!! My question involves EMC with xylotex drivers and

powermax II

> > motors. The "BDI" install went quite flawlessly. now I can

increment

> > on the screen but I only get a slight "whistle" from the motors

every

> > so often. I am most likely overlooking something in the .INI

file. It

> > seems vague as to setting up for just steppers. I had the whole
> > system running with "stepster" on the same computer, added a new

hard

> > drive for EMC BDI, and I've hit my first ditch. Any help will be

most

> > appreciated. I Thank You For Your Time And Effort!!
> >
> >
> >
> > Addresses:
> > FAQ: http://www.ktmarketing.com/faq.html