Re: EMC Help Required!

Hi steve
INPUT_SCALE parameter sets the step pulses required by emc to make
1 inch move. therefor The input scale variable can never be a
floating point value. it must be an integer value

It can be calculated by multiplying the resolution of
stepper motor by the pitch of lead screw.
like most stepper motors have 200 steps(1.8DEG/Step) per revolution
as their resolution when they are running in FULL-STEP. and if lead
screw pitch is 5 then your input scale value will be:
INPUT_SCALE = 200 * 5 = 1000

incase if your stepper drive runs stepper in half step then your
stepper resolution will be '400' and your input scale value will be:

INPUT_SCALE = 200 * 5 = 2000
if your input scale parameter is set correctly you'll have a one inch
jog from the emc jog buttons resulting in an exact one inh move!
if your input scale is not set correctly a one inch jog wont be a one
inch actual move.
by joging one inch from emc gui and observing the actual positon
travelled by the axis you can scale the INPUT_SCALE parameter
by dividing or multiplying with the factor by which the actual move
differs from one inch.

regards

asim



--- In CAD_CAM_EDM_DRO@yahoogroups.com, "paragon032003" <sme@p...>
wrote:

> Dear Group,
>
> I have managed to calibrate the stepper motors so that what is
> displayed on screen reflects that of physical movement of the x,y

and

> Z axis, however the machine is running very slowly and when trying

to

> jog at speed the stepper motors make strange noises and seem to go

no

> where fast.
>
> The setting for INPUT and OUTPUT SCALE = 685.71428571 0 (thisI
> managed to workout by clocking the table and much trial and error.
> When this was set at -16000.0 0 the machine would move fast and
> smoothly when jogging etc etc.
>
> Am I missing something?
>
> Kind Regards
> Steve.