RE: [CAD_CAM_EDM_DRO] Re: I am loosing one step. weir!

I bought the IOX activex control from JS Payne several years ago and it has
worked great.
http://www.greymatter.com/publishers/00001746.htm

Dennis C


-----Original Message-----
From: luisguillermo98 [mailto:luisguillermo98@...]
Sent: Wednesday, July 03, 2002 6:16 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Re: I am loosing one step. weir!


DO you know a .dll to access the parallel port using vb?. as you know
vb can not access the port directly. it has to be done throught
a .dll.

--- In CAD_CAM_EDM_DRO@y..., JanRwl@A... wrote:
> In a message dated 02-Jul-02 20:46:17 Central Daylight Time,
> luisguillermo98@y... writes:
>
>
> > dealy code
>
> Delay code? Simple: Let's say your stepper/screw needs 200
steps per
> turn, and you want to make FIVE turns (that's 1000 steps by MY
math). AND,
> you want to make it go SLOW. You have a machine-code at address=A
which
> makes ONE step for each CALL(A).
>
> Then you'd do this: 100 A=machine-code address
> 110 FOR X=1 TO 1000
> 120 CALL(A)
> 130 FOR D=1 TO 10:NEXT
> 140 NEXT X
>
> In line #130, you would make the "10" smaller for FASTER, or larger
for
> SLOWER.
>
> However, I have a standard "delay loop" in my machine-code which
has H and L
> bytes, and H is always just 01, but L can be 3, 7, 15, 30, or 60
(for the
> particular PC I am using, an old 20 mHz. machine). That is, I POKE
AD, 3 (or
> 7, etc.) before using the CALL. Each increment the byte in AD is a
tiny
> amount of time (I forget what it actually is, now, but it is in the
m
> icroseconds for a 20 mHz. computer-clock). That is, I do NOT use
lines like
> line #130 in this example.
>
> You can write the ASM-86 code @ "A" either to step CW or CCW, or,
you could
> write it so it would first set Direction, and then Step. I wrote
mine with
> EIGHT values for "A", one steps X-CW, another X-CCW. Then others Y-
CW,
> Y-CCW, X and Y N.E., N.W., S.W., and S.E. (45° moves).
>
> Doing it with line-#130 in BASIC, even with a "1" in place of the
10, will be
> VERY slow! (Unless you are using a 500 mHz desktop!)
>
> Lotsa luck! Jan Rowland
>
>
> [Non-text portions of this message have been removed]


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