Hi,
thanks for all your comments so fare.
0. move to home position (0°)
1. wait for low frequency trigger, a hardware or a software signal
2. within say 10° accelerate and synchronises to the 50Hz trigger
so that the 10° position is reached 20ms after the last trigger
and at a
On Friday 25 April 2014 11:08:55 Florian Rist did opine:
Hi,
thanks for all your comments so fare.
0. move to home position (0آ°)
1. wait for low frequency trigger, a hardware or a software signal
2. within say 10آ° accelerate and synchronises to the 50Hz trigger
so that
Hi
[Beaglebone black + BLDC contorller]
Alternatively the Pico PWM brushless servo amp only needs a single
channel of PWM:
http://www.pico-systems.com/acservo.html
A Gecodrive G320X [1] would be even easier to run from a Beaglebone as
it does not require a PWM/Dir but a Step/Dir signal.
On 24 April 2014 02:17, Jon Elson el...@pico-systems.com wrote:
But, yes, a Mesa controller has a full sign/magnitude output
available. I wasn't sure Florian was going to use a
traditional controller and Hal for this.
I think there is some confusion here still.
The 7i39 needs three channels
Hi Jon
http://www.pico-systems.com/acservo.html
Ah, I see that would make thinks much easier.
You COULD, in theory, run it with just the Direction signal in
synchronous antiphase mode, but this may cause the
filter inductors (and maybe the motor, too) to run hot.
Our servo amp was
On Tue, 22 Apr 2014, Florian Rist wrote:
Date: Tue, 22 Apr 2014 18:24:42 +0200
From: Florian Rist fr...@fs.tum.de
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: emc-users@lists.sourceforge.net
Subject: [Emc-users] Motion Synchronization to ext. trigger?
On 04/23/2014 09:07 AM, Florian Rist wrote:
Hi Jon
http://www.pico-systems.com/acservo.html
Ah, I see that would make thinks much easier.
You COULD, in theory, run it with just the Direction signal in
synchronous antiphase mode, but this may cause the
filter inductors (and maybe the motor,
Hi Jon
Andy Pugh suggested you could run my PWM servo amps with
just ONE wire/output pin. That is what I was referring to,
and that two wires would be better.
Ah, OK. Got it. Thank for the clarification.
With sign/magnitude control, there is no output
until the PWM signal has pulses on
On 23 April 2014 16:57, Jon Elson el...@pico-systems.com wrote:
Andy Pugh suggested you could run my PWM servo amps with
just ONE wire/output pin
What I was meaning was that it only needed one PWM channel, rather
than the phase-locked 3-phase PWM that the 7i39 needs.
I wasn't suggesting that it
Hi Andy
Andy Pugh suggested you could run my PWM servo amps with
just ONE wire/output pin
What I was meaning was that it only needed one PWM channel, rather
than the phase-locked 3-phase PWM that the 7i39 needs.
I wasn't suggesting that it didn't also need direction, enable etc pins.
On 04/23/2014 12:06 PM, andy pugh wrote:
On 23 April 2014 16:57, Jon Elson el...@pico-systems.com wrote:
Andy Pugh suggested you could run my PWM servo amps with
just ONE wire/output pin
What I was meaning was that it only needed one PWM channel, rather
than the phase-locked 3-phase PWM that
On 22 April 2014 17:24, Florian Rist fr...@fs.tum.de wrote:
So, first question: Can I hook up the 7I39 to a BeagleBone Black. Well
of course I can, but is this somehow supported already, so that it is
simple to do? Any other driver suggestions?
The problem here is that the 7i39 expects a
Hi Andy,
thanks for you comments.
Alternatively the Pico PWM brushless servo amp only needs a single
channel of PWM:
http://www.pico-systems.com/acservo.html
Ah, I see that would make thinks much easier. And I'm not forced to use
the Beaglbone I could was well you a micro/nanoATX board and a
I think this could be done as a geared solution, if you could work
from a phase locked (to 50hz) clock at some higher rate, and use that
as the encoder signal, and the 50hz as a trigger to g76 with suitable
parameters it would then be synchronised and have a flyback (gate the
laser off then), or
On 22 April 2014 18:20, Florian Rist fr...@fs.tum.de wrote:
Is there something like a PLL component in LinuxCNC
Not as far as I know.
Or perhaps the better answer is not yet.
--
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto
Hi Dave
I think this could be done as a geared solution,
Of couse, I forgot to mention, there will be a reduction gear about 1:50
or 1:100, the motor is not very strong and the scanner ways about 5 kg
and will be mounted eccentrically, so it will create quite some torque
and inertial mass.
if
On 22 April 2014 18:38, Florian Rist fr...@fs.tum.de wrote:
By the way, can the starting angular position of the thread be specified
in LinuxCNC?
Not directly. For multi-start threads you offset the starting position.
--
atp
If you can't fix it, you don't own it.
Hi Andy
Not directly. For multi-start threads you offset the starting position.
So two G33.1 calls at the same position and with the same parameters or a Z
offset of an integer multiple of the pitch will cut the same thread. In a way
the thread starts always at 0°.
See you
Flo
On 04/22/2014 12:20 PM, Florian Rist wrote:
Hi Andy,
thanks for you comments.
Alternatively the Pico PWM brushless servo amp only needs a single
channel of PWM:
http://www.pico-systems.com/acservo.html
Ah, I see that would make thinks much easier.
You COULD, in theory, run it with just the
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