Re: EMC w/steppers & Xylotex

Again Thank you for your help !! I did pick up on the different
pinouts while I was getting everything together so I have already
made and installed ythe "crossover" cable. I am not a programmer by
any means so that was the route I chose. I did however use freqmod.o
instead of steppermod.o and maybe that is my problem. I will change
it now and find out.
Regards,
Ken
--- In CAD_CAM_EDM_DRO@yahoogroups.com, "jeffalanp" <xylotex@h...>
wrote:

> 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