Re: [CAD_CAM_EDM_DRO] How to setup STG-II? (homing problem fix)
Posted by
Les Watts
on 2002-05-08 10:51:46 UTC
I am running STG II with dc servo using Copley 412 amps. For more details
check my engineering page link at the bottom. I am using a K6 200 MHz with
32M ram.
I must tell you to expect a problem with the homing sequence with EMC on the
STG II 8 axis cards.
This bug crops up on all the motion modules such as stg8mod.o, stgmod.o,
newstgmod.o, etc.
The bug manifests itself as an inability to detect the index pulse on the
encoders even though
the STG diagnostics program sees it. Clicking home on the gui results in
the axis blowing right
through the home switch and initiating estop upon reaching the limit switch.
The rest of the program
works... it just does not have a precisely defined home. (runs with yellow
numbers in the display)
Paul Corner and I had a marathon late night session looking through the code
to find the problem.
It turns out that two registers IDLEN (offset 0x409)and SELDI (offset
0x40B) needed to be directly written to in newstg.c to enable the index
pulse and select the encoder as the source. 1s need to be written to all
bits in the former and 0s in the latter. This is a crude fix but it works.
Paul and NIST will clean it up very soon so I will let him discuss it
further on the EMC list
(do join it!). I am sure we will be able to get you the fix assuming you
have this problem.
As for other configuration parameters- I can post an EMC.ini on the web site
known to be
good with STG II. I must rem out the PID and feedforward gains and put in
safe low
numbers so you won't have a real exciting power up.
We will try to get you up and running with a minimum of fuss. My STG II 8
axis/EMC
is running very nicely- no lockups or funny stuff so far. I have been fine
tuning the
feedforward coefficients lately.
Les
Leslie Watts
L M Watts Furniture
Tiger, Georgia USA
http://www.rabun.net/~leswatts/wattsfurniturewp.html
engineering page:
http://www.rabun.net/~leswatts/shop.html
check my engineering page link at the bottom. I am using a K6 200 MHz with
32M ram.
I must tell you to expect a problem with the homing sequence with EMC on the
STG II 8 axis cards.
This bug crops up on all the motion modules such as stg8mod.o, stgmod.o,
newstgmod.o, etc.
The bug manifests itself as an inability to detect the index pulse on the
encoders even though
the STG diagnostics program sees it. Clicking home on the gui results in
the axis blowing right
through the home switch and initiating estop upon reaching the limit switch.
The rest of the program
works... it just does not have a precisely defined home. (runs with yellow
numbers in the display)
Paul Corner and I had a marathon late night session looking through the code
to find the problem.
It turns out that two registers IDLEN (offset 0x409)and SELDI (offset
0x40B) needed to be directly written to in newstg.c to enable the index
pulse and select the encoder as the source. 1s need to be written to all
bits in the former and 0s in the latter. This is a crude fix but it works.
Paul and NIST will clean it up very soon so I will let him discuss it
further on the EMC list
(do join it!). I am sure we will be able to get you the fix assuming you
have this problem.
As for other configuration parameters- I can post an EMC.ini on the web site
known to be
good with STG II. I must rem out the PID and feedforward gains and put in
safe low
numbers so you won't have a real exciting power up.
We will try to get you up and running with a minimum of fuss. My STG II 8
axis/EMC
is running very nicely- no lockups or funny stuff so far. I have been fine
tuning the
feedforward coefficients lately.
Les
Leslie Watts
L M Watts Furniture
Tiger, Georgia USA
http://www.rabun.net/~leswatts/wattsfurniturewp.html
engineering page:
http://www.rabun.net/~leswatts/shop.html
----- Original Message -----
From: "riet91" <riet91@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Wednesday, May 08, 2002 7:45 AM
Subject: [CAD_CAM_EDM_DRO] How to setup STG-II?
> Hi All,
> I have Installed BDI EMC version 2.09 and purchased the Servo To
> go 's Model II - 8 axis Motion Control card ( STG II), I intend to
> use this on a Hurco's Milling having DC Servo motors. I have
> following questions in this regard:
>
> 1)Please Suggest me how to configure EMC for STG II.
>
> 2)Is the BDI EMC intall by default for LPT port? if yes how to set it
> for STG-II?
>
> 3)Most of the posts I have read indicate that people are running EMC
> on Pentium I systems with less then 32 MB memory, I installed on my
> system which is 200 MMX with 64 MB RAM but this made my system very
> slow. Have anyone run EMC on Pentium III or is it not recommended? is
> there any recommended hardware list' website?
>
> 4) what will happen if BDI EMC install confilicts with any system's
> hardware will it stop installation or will it install successfully
> and later on during operation it may cause trouble?
>
> Thanking you all in advance.
>
> Babar
>
>
>