USE_INDEX in homing with HAL

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24 Dec 2009 05:46 #1384 by aike
Hi all!
I want to use USE_INDEX = TRUE scheme for homing.
I found the description of this method in HAL Manual Chapter 4.5 Encoder.
Can anybody help me with examples?

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25 Dec 2009 12:55 #1393 by BigJohnT
Please post questions only in one forum. Cross posting is not needed.

Do you have a servo driven machine with an encoder feedback that has an index pulse?

John

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25 Dec 2009 14:01 #1395 by robh
please let us know what hardware you are using?
MESA card or other
as john says do your encoders have an index signal.

if so take a look at the servo example hal files included with emc these show a MESA setup but as we dont know what setup you are running im afraid we can not offer any more detail help

thanks,
rob

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25 Dec 2009 18:09 #1397 by aike
BigJohnT wrote:

Please post questions only in one forum. Cross posting is not needed.

Do you have a servo driven machine with an encoder feedback that has an index pulse?

John

Yes, I have servo driven machine (SA-030-KM-11-04.0-030 www.bsystem.ru/products/55.php).
We use lathe scheme, with LPT output, XZ axes, no any additional servo or any card.
But only instead of step motor, we use above servo driven machine per each axe.
It permit us to make deviavation in 0,005 mm.
Off couse, we adjust config according to accuracy. But so as this servo machine permit
to make more 2500 rnd/min and has 6Hm, we can adjust its drive flexible.
Now we have only one problem. Every time after switch on the lathe, we have "new" coordinate
system. Latch and switch limit make error in 0.1 - 0.05 mm. If we will use "USE_INDEX", then
our coordinate system will adjusted each time in join limit switch and strop impulse from
servo drive.
We 've read the HAL manual, and found that can use it in our reseach.
We need only example (config) how to do it.

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26 Dec 2009 12:26 #1400 by BigJohnT
The following use_index = yes

montenc
sim/servo
all the hostmot2 servo
demo_mazak
boss

John

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