Question on half step config
- allenwg2005
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30 Mar 2019 17:36 #129983
by allenwg2005
Question on half step config was created by allenwg2005
Hi folks,
I'm running DC steppers at full step configuration, the motor and drive manufacturer suggested I use half stepping.
My HAL has the following line:
loadrt stepgen step_type=0,0,0,0 (I'm running a 4 axis drive)
I have been digging for hours to try and discern if this is the proper place to change to half steps, if I change this to read:
loadrt stepgen step_type=1,1,1,1
will that make the change in "Logic" I'm looking for?
And, are there any other changes I need to make in the software to get this to work? (The drive will naturally need to be adjusted)
Thanks in advance
I'm running DC steppers at full step configuration, the motor and drive manufacturer suggested I use half stepping.
My HAL has the following line:
loadrt stepgen step_type=0,0,0,0 (I'm running a 4 axis drive)
I have been digging for hours to try and discern if this is the proper place to change to half steps, if I change this to read:
loadrt stepgen step_type=1,1,1,1
will that make the change in "Logic" I'm looking for?
And, are there any other changes I need to make in the software to get this to work? (The drive will naturally need to be adjusted)
Thanks in advance
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- Todd Zuercher
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30 Mar 2019 19:14 #129988
by Todd Zuercher
Replied by Todd Zuercher on topic Question on half step config
To change from full to half steps in Linuxcnc, simply multiply your axis scale x2 in your ini file. You also must make the change on your driver, usually dip switches or jumpers.
Don't mess with the stepgen config line in the hal file.
Don't mess with the stepgen config line in the hal file.
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30 Mar 2019 19:51 #129989
by allenwg2005
Replied by allenwg2005 on topic Question on half step config
Hey Todd,
That was my second guess. lol
I was looking through the AA manual for my driver and it states the following:
Excitation Mode Select: (Terminal 8)
Pulled up to +5V through 10KÙ
Logic "1" - Half-step
Logic "O" - 2 ö Full-step
At first I thought removing the wire on Terminal 8 was the thing to do, but I'm not sure now exactly what they are trying to say here.
What would you suggest? (I can always wait until Monday AM to call them for clarity).
Thanks for the help as always, Allen
That was my second guess. lol
I was looking through the AA manual for my driver and it states the following:
Excitation Mode Select: (Terminal 8)
Pulled up to +5V through 10KÙ
Logic "1" - Half-step
Logic "O" - 2 ö Full-step
At first I thought removing the wire on Terminal 8 was the thing to do, but I'm not sure now exactly what they are trying to say here.
What would you suggest? (I can always wait until Monday AM to call them for clarity).
Thanks for the help as always, Allen
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- tommylight
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30 Mar 2019 21:49 #129996
by tommylight
Replied by tommylight on topic Question on half step config
That wire on terminal 8 where does the other side connect ?
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- allenwg2005
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30 Mar 2019 23:05 #130004
by allenwg2005
Replied by allenwg2005 on topic Question on half step config
The "Breakout board", a pin out on the LPT.
In short, LCNC
In short, LCNC
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- Todd Zuercher
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31 Mar 2019 03:01 #130012
by Todd Zuercher
Replied by Todd Zuercher on topic Question on half step config
Is that an old unipolar stepper drive from Anaheim Automation? I think most of them default to half stepping. To set to full steps you connect a jumper wire from that terminal to ground or voltage (can't remember).
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31 Mar 2019 06:42 #130016
by pl7i92
Replied by pl7i92 on topic Question on half step config
doesent half stepping Mean setting the DRIVER to 400 steps/rev
not the controll software
this is easy as it is DIP switch
not the controll software
this is easy as it is DIP switch
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31 Mar 2019 14:19 #130031
by allenwg2005
Replied by allenwg2005 on topic Question on half step config
Todd,
This is an old DPF72004, as I recall you leave that wire disconnected for half step, I will check with them to confirm.
pl7i92,
This drive has an odd layout, dip switches for some things but not for the stepping, maybe because it's older.
Thanks again for the help.
This is an old DPF72004, as I recall you leave that wire disconnected for half step, I will check with them to confirm.
pl7i92,
This drive has an odd layout, dip switches for some things but not for the stepping, maybe because it's older.
Thanks again for the help.
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- Todd Zuercher
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31 Mar 2019 17:54 #130045
by Todd Zuercher
Replied by Todd Zuercher on topic Question on half step config
We still have a couple of machines running those old
drives at work.
drives at work.
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01 Apr 2019 05:56 #130074
by pl7i92
Replied by pl7i92 on topic Question on half step config
Old Stuff is in Most Cases better then the Newer ones
so stay as long as you can with them
so stay as long as you can with them
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