Re: Following error

[Jon Elson <elson-at-pico-systems.com>]

Irfan Younis wrote:

>Dear Users,
>             I am a new user of EMC, before some days
>I installed successfully BDI 2.16 on my computer, I am
>using PII HP Kayak builtin mother bord (VGA and Sound)
>with 64 MB ram. I want to control Bridgeport Series I
>CNC machine with stepper motors. Motors is 56v 8.5A
>and 5 wires one coman and 4 for step and direction.
>When I command to move any axes then I get one error
>which is Following Error. I have adjust to PID, P=1 to
>1000 I=1 to 100 D=1 to 100 but the error is still
>there. Please help me in setting the ini file and PID
>gains. Thanks.
>  
>
It makes a difference what stepper control program you are using.  Your
choices are generally setppermod.o and freqmod.o

If you are trying to drive the original Bridgeport drivers, I think you 
have to
use freqmod.o with the phase drive setting turned on.  Bridgeport drivers
do not use step and direction.  That would only take 2 wires.  They take
4 signals that drive each of the 4 transistors on the driver board.  The
phase drive scheme does not generate the hi/lo power signal, so you need
another circuit to do that.

But, anyway, the following error is due to the simulation of a servo system.
Does it work better if you set it to a slower jog speed?  You can set that
with the < key, and watch the slider at lower left.  Try moving at a speed
of 1 IPM and see if that works better.  Watch the actual position - if it is
displaying commanded position, hit the -at- key to change the display.
P=1000 and all other PID and FFn parameters are usually 0 for freqmod.

Jon