2012/4/21 Jon Elson el...@pico-systems.com:
Stuart Stevenson wrote:
Would a read ahead of 1000 lines be more time consuming than the NURB
calculation?
A modest NURBS surface could be scanned pretty quickly to find the sharp
edges,
if any. 1000 block lookahead may not be necessary, even 100
2012/4/21 Kirk Wallace kwall...@wallacecompany.com:
I'm just getting into the middle of this thread, but if I recall, the
last time we visited this circuit we found two sets of datasheets for
the same device with different pin outs. Maybe a multimeter could sort
out the pins.
Kirk, You have
On 4/20/2012 6:29 PM, Scott Hasse wrote:
Unfortunately, this approach doesn't work well for things like plastic
extrusion where it can be difficult to control the extrusion rate precisely.
Repraps, etc are able to succeed in part because they take a very naive
approach to trajectory
Noticed the lists persistent discussion of the LinucCNC trajectory planning
functionality.
As a system designer I'm curious about the mentioned rule ability to stop at
end of next block and wonder what the rationale for such a rule consist of.
As a programmer I would also find it convenient to
total lookahead is a boundless problem, just as creating a 3d preview of the
commanded toolpaths is a boundless problem (the backplot). the controller on
some level can handle the ngc file in its entirety, so why not deal with
machine acceleration limits on the same level, or machine limits in
On 20.04.12 12:25, Jon Elson wrote:
Stuart Stevenson wrote:
Doesn't even G02/G03 result in a series of very small linear moves sent to
the servo motors? Wouldn't a NURB conversion do the same thing
Yes, in a way. But, the G02/G03 is known to be a single move, so
there is no velocity
The cuttoff slide was air over hydrolic to make it move smoother, just?get
rid of it
and use a cut off for a lathe that way you can put a little chamfer on the
OD before you part off.
I will do that.
Collet closer is air.Hope you have the solenoids for it because they keep
the collet closed
17 квітня 2012 р. 19:23 Peter C. Wallace p...@mesanet.com написав:
Did you verify the bit file md5 checksum?
Yes, it's ok.
There's some progress at last! Here's the simplified hal I try to check 7i39
loadrt trivkins
loadrt motmod servo_period_nsec=100 num_joints=3
loadrt probe_parport
If you need any help I can try.I have 3 Hardinges with one that I am
retrofitting
Hardinge website has most of the old prints
Good Luck
Terry
- Original Message -
From: Mike Cinquino mcinqu...@gmail.com
To: emc-users@lists.sourceforge.net
Cc:
Sent: Saturday, April 21, 2012 8:36 AM
On Saturday, April 21, 2012 10:02:54 AM Viesturs Lācis did opine:
2012/4/21 Kirk Wallace kwall...@wallacecompany.com:
I'm just getting into the middle of this thread, but if I recall, the
last time we visited this circuit we found two sets of datasheets for
the same device with different
Terry, you sound very knowledgeable on the workings of the turret. I have
an HNC that I successfully retrofitted. All works fabulously, except for a
running fight with the turret. It will work perfectly one day, and fail to
latch repeatedly the next. If it were reliable, this could be a production
2012/4/21 Andrew parallel.kinemat...@gmail.com:
setp hm2_7i43.0.3pwmgen.00.A-value 1
setp hm2_7i43.0.3pwmgen.00.B-value 0
setp hm2_7i43.0.3pwmgen.00.C-value 0
IMHO these will tell to apply current to a certain winding of the
motor, so it will not move anywhere.
You might try to setp
On Sat, 21 Apr 2012, Andrew wrote:
Date: Sat, 21 Apr 2012 17:11:51 +0300
From: Andrew parallel.kinemat...@gmail.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] BLDC
21 квітня 2012 р. 17:56 Viesturs Lācis viesturs.la...@gmail.com написав:
2012/4/21 Andrew parallel.kinemat...@gmail.com:
setp hm2_7i43.0.3pwmgen.00.A-value 1
setp hm2_7i43.0.3pwmgen.00.B-value 0
setp hm2_7i43.0.3pwmgen.00.C-value 0
IMHO these will tell to apply current to a certain
Hi all;
I was able to find a schematic for one of the earlier controllers used in
these machines, for one that had the external interfacing stuff on a
daughterboard and I suspect it might be usable as a trouble shooting guide
if it was printable. But that link isn't printable, for some reason
With dependable tool changes on a HNC. the stop latch (under the cover on the
operator side of the carrage)
is usually the thing to get right.Adjustments are made by removing the long
black cover on the right
side of the carrage.Under here there is a round plug with a hex socket,BUT
remember to
21 квітня 2012 р. 18:06 Peter C. Wallace p...@mesanet.com написав:
Yes that is correct but of course the three phase outputs of the bldc comp
must connect to the 3 phase inputs of the 3ppwmgen and the proper init
sequence must be triggered in the bldc comp (man bldc)
The motor is moving
On 4/21/2012 11:42 AM, gene heskett wrote:
Hi all;
I was able to find a schematic for one of the earlier controllers used in
these machines, for one that had the external interfacing stuff on a
daughterboard and I suspect it might be usable as a trouble shooting guide
if it was printable.
On 4/17/2012 11:33 PM, Przemek Klosowski wrote:
On Tue, Apr 17, 2012 at 11:18 AM, Kent A. Reedkentallanr...@gmail.com
wrote:
Speaking of the Wikinudge, nudge, wink, wink, it could use a lot more
editorial work. Looking at the Recent Changes listing, I see the usual
few suspects making
On Sat, 2012-04-21 at 09:17 -0700, Terry Christophersen wrote:
With dependable tool changes on a HNC. the stop latch (under the cover on the
operator side of the carrage)
is usually the thing to get right.Adjustments are made by removing the long
black cover on the right
side of the
I have somewhat unreliable tool changes as well. Sometimes it'll miss the
change entirely and spin two or three revolutions before the ladder times out.
Sometimes it seems like it pops the stop too early, and catches the turret in
the wrong position. Often I'll hear what sounds like the stop
On Sat, 21 Apr 2012, Andrew wrote:
Date: Sat, 21 Apr 2012 19:38:15 +0300
From: Andrew parallel.kinemat...@gmail.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] BLDC
21 квітня 2012 р. 20:30 Peter C. Wallace p...@mesanet.com написав:
if you have the parameters right, you may still have the phase rotatiom
backwards, this can be fixed by swapping 2 motor leads.
Thanks Peter, that is possible. Can I change something in hal to avoid
swapping wires?
The
Kirk is 100% correct, the o-rings need to be replaced once and a while.I would
guess
most didnt until something wouldnt work.It is a pain but if you only have to do
it
every 10 years or so it doesnt seem too bad.
Like Kirk said make sure the stop prawl is what is stopping the turret it
should
It would be interesting for someone to use HalScope and start rotating the
turret
and graph the magnetic sensor outputs.I think that they wont be perfectly
spaced,
it will be close but once I had all stations to work but one.(That was without
the stop)
That is why it is important to fire the
On Sat, 2012-04-21 at 13:26 -0400, Ian McMahon wrote:
I have somewhat unreliable tool changes as well. Sometimes it'll miss
the change entirely and spin two or three revolutions before the
ladder times out. Sometimes it seems like it pops the stop too early,
and catches the turret in the
Viesturs Lācis wrote:
2012/4/21 Jon Elson el...@pico-systems.com:
Stuart Stevenson wrote:
Would a read ahead of 1000 lines be more time consuming than the NURB
calculation?
A modest NURBS surface could be scanned pretty quickly to find the sharp
edges,
if any. 1000 block
21 квітня 2012 р. 21:00 Andrew parallel.kinemat...@gmail.com написав:
if you have the parameters right, you may still have the phase rotatiom
backwards, this can be fixed by swapping 2 motor leads.
Thanks Peter, that is possible. Can I change something in hal to avoid
swapping wires?
On Sat, 2012-04-21 at 10:55 -0700, Terry Christophersen wrote:
It would be interesting for someone to use HalScope and start rotating the
turret
and graph the magnetic sensor outputs.I think that they wont be perfectly
spaced,
it will be close but once I had all stations to work but
Another way to tell if your stop is doing the job is turn down the pressure of
your
air supply and spin the turret at a different speed.this will tell if
you are just timing the turret with the sensor and getting lucky or if you are
using the stop correctly.slowing down the speed of the turret
Viesturs Lācis wrote:
I just resoldered the same transistor for the base-collector-emitter
pinout (collector in the middle, not base as I tried previously) and
tested and it works.
Great. If it has the same part number, it SHOULD have the same pinout!
Any maker who does it differently
On Sat, 21 Apr 2012, Andrew wrote:
Date: Sat, 21 Apr 2012 21:30:11 +0300
From: Andrew parallel.kinemat...@gmail.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] BLDC
gene heskett wrote:
But then which of the
other two are emitter and collector?
This can usually be done with a DVM with diode test. Connect the
meter between C and E, and then connect a resistor, like 22K Ohm
between base and the suspected collector. Note the meter reading.
If it is about
All these tests are how I did things with the origional control
I dont know how many people on this list ran these with the old GEs,
but I used to say a little prayer when I turned mine on,
sometimes he would listen sometimes not.
So whatever problem you have with a retrofitted one will pale
in
On Saturday, April 21, 2012 01:55:08 PM Kent A. Reed did opine:
On 4/21/2012 11:42 AM, gene heskett wrote:
Hi all;
I was able to find a schematic for one of the earlier controllers used
in these machines, for one that had the external interfacing stuff on
a daughterboard and I suspect
21 квітня 2012 р. 21:39 Peter C. Wallace p...@mesanet.com написав:
Yes, until you get the commutation and PID right you are using your BLDC
like a step motor (so dont leave it on if it does not work)
You could also run from a low motor voltage until you get things working
(say 5V)
I use
2012/4/21 Jon Elson el...@pico-systems.com:
The real problem I see is that RATIONAL G-code that was correctly written to
perform a particular operation cannot be executed as fast as the machine and
drives COULD allow it to go, due to the stop on next block requirement.
I agree.
What I see the
On Sat, 21 Apr 2012, Andrew wrote:
Date: Sat, 21 Apr 2012 22:53:55 +0300
From: Andrew parallel.kinemat...@gmail.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] BLDC
Gentlemen,
Since we have discussed this so long I have remembered a project that
would be similar and maybe be completed at the same time. I want to
implement 5 axis cutter compensation. Currently, LinuxCNC's cutter
compensation takes the cutter radius into consideration. This makes the
On Saturday, April 21, 2012 05:06:04 PM Jon Elson did opine:
gene heskett wrote:
But then which of the
other two are emitter and collector?
This can usually be done with a DVM with diode test. Connect the
meter between C and E, and then connect a resistor, like 22K Ohm
between base
On Saturday, April 21, 2012 05:16:18 PM Jon Elson did opine:
Viesturs Lؤپcis wrote:
I just resoldered the same transistor for the base-collector-emitter
pinout (collector in the middle, not base as I tried previously) and
tested and it works.
Great. If it has the same part number, it
21 квітня 2012 р. 23:04 Peter C. Wallace p...@mesanet.com написав:
might try inverting the sign on your encoder scale (or bldc scale
I already did that, with no success. But out af a sudden it works
now. Though still unstable.
Now tuning PID.
What is minimum servo period for 7i43? I set 50
On Sun, 22 Apr 2012, Andrew wrote:
Date: Sun, 22 Apr 2012 00:42:18 +0300
From: Andrew parallel.kinemat...@gmail.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] BLDC
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Installed from the LinuxCNC live CD to my test Intel Sandybridge
system (Intel DQ670W motherboard) and am having issues with networking.
It appears the kernel is old enough to not recognize either the
on-board GigE network port or to talk to the PCI
optimum value for planning ahead for a possible stop or maximum acceleration
change: take current feed for current block and maximum possible accel of
machine to get distance required for stop. then next N blocks that cover that
distance, and apply appropriately modified feeds to them.
think
22 квітня 2012 р. 02:04 Peter C. Wallace p...@mesanet.com написав:
Minimum period depends on how many I/O cycles you do and how much of the
host cycles you are willing to burn up doing I/O. with the parallel ports
I've tested with, I get between 3-6 Usec of I/O time for each 32 bit
register
On Sun, 22 Apr 2012, Andrew wrote:
Date: Sun, 22 Apr 2012 02:20:51 +0300
From: Andrew parallel.kinemat...@gmail.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] BLDC
On 21 Apr 2012, at 18:30, Peter C. Wallace p...@mesanet.com wrote:
if you have the parameters right, you may still have the phase rotatiom
backwards, this can be fixed by swapping 2 motor leads.
Actually, it is easier to use a negative encoder scale into bldc. In fact that
will be
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
On 4/21/2012 1:26 PM, Charles Steinkuehler wrote:
Installed from the LinuxCNC live CD to my test Intel Sandybridge
system (Intel DQ670W motherboard) and am having issues with
networking.
It appears the kernel is old enough to not recognize
Viesturs Lācis wrote:
What I see the big issue for solving this in trajectory planner or
whatever _inside_ LinuxCNC is that I do not see, how to determine by
some hard facts, what is the best way to determine the lookup amount.
The number of blocks you need to look ahead is variable. The
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