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

In a message dated 02-Jul-02 20:46:17 Central Daylight Time,
luisguillermo98@... 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


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