an or rotary axis. This makes sense
for machines where joint and axis do not map exactly, such as gantry devices
that may have duplicated X,Y,Z joints (so up to 6) but only 3 axis or say a
CoreXY laser cutter where the joints and cartesian axis are related by a
kinema
der software control
(and 350 mA on inductive or non-inductive loads with no flyback diodes)
-Original Message-
From: Peter Wallace [mailto:p...@mesanet.com]
Sent: May 10, 2024 1:54 PM
To: Todd Zuercher
Cc: Todd Zuercher via Emc-users
Subject: Re: [Emc-users] Mesa Card Stepgens?
On Fr
On Fri, 10 May 2024, Todd Zuercher wrote:
Date: Fri, 10 May 2024 20:40:53 +
From: Todd Zuercher
To: Peter Wallace
Cc: Todd Zuercher via Emc-users
Subject: RE: [Emc-users] Mesa Card Stepgens?
Peter,
I've ran into another bit of a snag. I have a couple of 24v relays from
the mb2hal configuration files?
Todd Zuercher
P. Graham Dunn Inc.<http://www.pgrahamdunn.com/index.php>
630 Henry Street
Dalton, Ohio 44618
Phone: (330)828-2105ext. 2031
Could this be some permissions or device name error with USB--> RS-485
device driver?
Peter Walla
make sense for some higher data rate applications like
motion synchronized video data for engraving.
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Peter Wallace
Mesa E
On Wed, 17 Apr 2024, Chris Albertson wrote:
Date: Wed, 17 Apr 2024 17:50:46 -0700
From: Chris Albertson
To: "Enhanced Machine Controller (EMC)"
Cc: Peter Wallace
Subject: Re: [Emc-users] Big Tree Tech Re: Mesa Card Stepgens?
No it does not fail, we can always send new commands in
On Wed, 17 Apr 2024, Todd Zuercher wrote:
Date: Wed, 17 Apr 2024 18:14:10 +
From: Todd Zuercher
To: Peter Wallace ,
Todd Zuercher via Emc-users
Subject: RE: [Emc-users] Home to index triggers following error
The machine is currently running Linuxcnc 2.7, but the Mesa cards
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Peter Wallace
Mesa Electronics
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unlimited resources.
Peter Wallace
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On Mon, 15 Apr 2024, Todd Zuercher wrote:
Date: Mon, 15 Apr 2024 20:22:03 +
From: Todd Zuercher
To: Peter Wallace ,
Todd Zuercher via Emc-users
Subject: RE: [Emc-users] Mesa Card Stepgens?
Thanks Peter,
We've had this 7i85s for quite a while, and it must be one of the early ones
m Dunn Inc.<http://www.pgrahamdunn.com/index.php>
630 Henry Street
Dalton, Ohio 44618
Phone: (330)828-2105ext. 2031
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On Tue, 2 Apr 2024, Todd Zuercher wrote:
Date: Tue, 2 Apr 2024 15:01:10 +
From: Todd Zuercher
To: "Enhanced Machine Controller (EMC)" ,
Peter Wallace
Subject: RE: [Emc-users] 7i84 Trouble?
Went and powered up the machine again today to give it a another look, and now
. Graham Dunn Inc.<http://www.pgrahamdunn.com/index.php>
630 Henry Street
Dalton, Ohio 44618
Phone: (330)828-2105ext. 2031
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eed is for the servo drive enable(s) All the
limits are 24v prox sensors etc.
You can split the I/O on a 7I84 so half (16 inputa and 8 outputs)
are 5V and the other half are 24V
Peter Wallace
Mesa Electronics
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t supply VFIELDA and VFIELDB with 5V
This will make the I/O all 5V
If you happen to have a REV A 7I84
you can run the whole card on 5V only
(VIN,VFIELDA,VFIELDB)
(none of this applies to the 7I84D)
Peter Wallace
Mesa Electronics
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E
shy of one input.
If the three inputs per axis include limits, you could save
inputs by sharing limit inputs between axis, In addition
you can share a limit and home on the same axis.
With maximum sharing you could get away with only 5 inputs
(4 home switches and a combined limit input)
Peter Wa
Yep
Thanks
John
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https://l
or all you hard work on this.
Its great to have an official release that
leaves the Python 2/3 mess behind
Peter Wallace
Mesa Electronics
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nuxCNCs control loop can dither between
stopped and the 1/40 Hz minimum at 1/servo period rate to get much
lower actual step rates (days per step)
-Original Message-
From: Peter Wallace [mailto:p...@mesanet.com]
Sent: October 25, 2023 8:35 AM
To: Enhanced Machine Controller (EMC)
Sub
unnecessary)
I've asked the drive manufacturer. See if they get back to me.
Todd Zuercher
P. Graham Dunn Inc.
630 Henry Street
Dalton, Ohio 44618
Phone: (330)828-2105ext. 2031
-Original Message-
From: Peter Wallace
Sent: Wednesday, October 25, 2023 10:36 AM
To: Enhanced Machine Controlle
le the mode.
Todd Zuercher
P. Graham Dunn Inc.<http://www.pgrahamdunn.com/index.php>
630 Henry Street
Dalton, Ohio 44618
Phone: (330)828-2105ext. 2031
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dd a 7I85 or 7I85S
Thanks in advance!
Viesturs
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tp://geneslinuxbox.net:6309/>
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ing
errors it's better to use the stepgens in velocity mode and
close the (local) position with a PID loop.
Typical settings for the loop are
P = 1/servo period so 1000 for a 1 ms servo thread
FF1 = 1.000
FF2 = Time between Position read and velocity write
(say 20 us on a PCI card =.2, perhaps 200
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Peter Wallace
Mesa Electronics
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edges so the best you can do is calculate the time between edges so even a
modest 10% duty cycle error causes relatively huge velocity noise.
Peter Wallace
Mesa Electronics
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were correct,
it should make no difference.
You would end up with longer active step pulse times
with inverted step polarity, though you may violate
the direction hold time if the hold time is set short
relative to the step pulse length.
Peter Wallace
Mesa
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