On 25 November 2014 at 02:10, Leonardo Marsaglia
leonardomarsagli...@gmail.com wrote:
Well, the lathe I'm going to try this on is the Mazak. It has the spindle
sensor coupled with a timing pulley so there are no gears.
What is wrong with the existing spindle sensor?
--
atp
If you can't fix
2014-11-25 0:40 GMT-03:00 Gene Heskett ghesk...@wdtv.com:
360, a pulse every degree? if you can only track it to 20 kilohertz, your
circuit is in trouble by about 58 rpm. I am using a 50 cycle/turn
encoder, and the 5i25 is still loafing at 1500 revs. But I would think it
would have to work a
2014-11-25 7:28 GMT-03:00 andy pugh bodge...@gmail.com:
What is wrong with the existing spindle sensor?
Andy, just before answering you I removed the sheet that covers the acces
to the sensor, and found out that it's a rotary encoder. The brand is Nikon
and the model number is RFh - 1024 - 22
Control signals are the same regardless of current and voltage rating so the
same chip for example a MCU or FPGA could be used for signal generation
regardless of size which is the reason why I want them as separate modules with
or without the control logic. The second reason is inverter bridge
Most of this discussion is past my knowledge level
but this may be easy to build ( not a module but few parts )
and 250w to 2kw and fairly high voltage
HTH
http://www.irf.com/technical-info/appnotes/an-1044.pdf
regards
TomP
tjtr33
On 11/25/2014 10:15 AM, Karlsson Wang wrote:
Control signals are
On 25 November 2014 at 16:11, Leonardo Marsaglia
leonardomarsagli...@gmail.com wrote:
Having a 1024 PPR encoder is not that bad, I guess I can scale it using HAL
(is that right?) and that would give a pretty accurate variation for
cutting the lobes.
Yes, if you set the encoder scale to
On Tuesday 25 November 2014 09:49:28 Leonardo Marsaglia did opine
And Gene did reply:
2014-11-25 0:40 GMT-03:00 Gene Heskett ghesk...@wdtv.com:
360, a pulse every degree? if you can only track it to 20 kilohertz,
your circuit is in trouble by about 58 rpm. I am using a 50
cycle/turn
Yes it is except EMC problems. This module have three half bridges. I used two
half bridges and four dicrete transistors instead. It works but would be
simpler to just buy this building block if available.
With direct access to the switches I will be able to implement better control
algorithm
hi
i am interesting in motor drive for nema 34 ac servomotor
motor has --torque 23 lb in, 4000 rpm. 6 Amp
Sinusoidal
On 25 November 2014 at 20:30, a k pccncmach...@gmail.com wrote:
motor has --torque 23 lb in, 4000 rpm. 6 Amp
Voltage?
--
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto
--
Download BIRT
Hello!
I need to drive 2 high-speed spindle motors, 3,7 kW each. For that I
have 11 kW VFD.
The problem is that I attached motors to the drive, tried to run them,
but VFD does not increase frequency above 8-9 hertz (all the default
frequency values are 50 hertz, I checked them and set to 100 to
Hi Viesturs!
If your VFD has a vector control, maybe you should switch it over to V/F
control with constant torque. I had the same trouble with my Hyundai VFD.
Regards,Andrew
...
23:43 +0300 от Viesturs Lācis viesturs.la...@gmail.com:
Hello!
I need to drive 2 high-speed spindle motors,
any between 120-220 V AC
On Tue, Nov 25, 2014 at 12:39 PM, andy pugh bodge...@gmail.com wrote:
On 25 November 2014 at 20:30, a k pccncmach...@gmail.com wrote:
motor has --torque 23 lb in, 4000 rpm. 6 Amp
Voltage?
--
atp
If you can't fix it, you don't own it.
Thank you! Yes, there is such a setting.
Could you, please, explain in more detail, if there are any
addditional settings I should pay attention to, when switching over to
vector control? Or should I just start with this one change and check
for any improvements?
Viesturs
2014-11-25 23:00
On 11/25/2014 11:46 AM, andy pugh wrote:
On 25 November 2014 at 16:11, Leonardo Marsaglia
leonardomarsagli...@gmail.com wrote:
Having a 1024 PPR encoder is not that bad, I guess I can scale it using HAL
(is that right?) and that would give a pretty accurate variation for
cutting the lobes.
Just change it to volts/hz.
I'd set it up like it is one big motor. Add the full load amps
together, etc like you mentioned.
It should work with a volts/hz setting.
Some drives are just too smart. :-)
Dave
On 11/25/2014 4:09 PM, Viesturs Lācis wrote:
Thank you! Yes, there is such a
Last week I started a post about larger machines and parts and working
around jog while paused being missing in LCNC and I had enough posts showing
me that Machinekit does indeed have the jog while paused. So we went over
there to check it out yes they have it and we played with it on the sim and
You do NOT want to switch to vector control. Andew was suggesting that you
switch FROM vector TO V/Hz control. I agree with him.
If you are going to run two motors on one VFD you must use straight V/Hz
control.
True vector control needs encoder feedback from the motor so that it can control
On 11/25/14 2:30 PM, Jeff Johnson wrote:
Last week I started a post about larger machines and parts and working
around jog while paused being missing in LCNC and I had enough posts showing
me that Machinekit does indeed have the jog while paused. So we went over
there to check it out yes they
On 25 November 2014 at 21:19, Dave Cole linuxcncro...@gmail.com wrote:
I've replaced some on Fords over the years and they typically fit into a
hole recess in the engine block and extend to sense a gear or segmented
ring.
Some sense a magnetised track on a code wheel.
They use a missing-tooth
2014-11-25 23:40 GMT+02:00 John Kasunich jmkasun...@fastmail.fm:
To summarize:
1) for more than one motor on a single drive, use V/Hz, not vector.
2) for a single motor, if you want to use vector, you must enter all the
motor nameplate data accurately into the drive. (Some drives have
a
:Sebastian Kuzminsky Wrote
Dewey Garrett is working on a version of JWP for LinuxCNC. It's very
different from what Machine kit is doing, and has different limitations.
It's implemented as a HAL circuit, so it's minimally invasive, so i'm
hoping to merge it for LinuxCNC 2.7.
Here's
On 11/25/14 3:01 PM, Jeff Johnson wrote:
:Sebastian Kuzminsky Wrote
https://www.youtube.com/watch?v=8QGOj39I-kk
We will be using it as long as it will work in Gmoccapy..Thanks
It is totally GUI-agnostic, but it does require the machine
integrator/builder to hook up some HAL wiring. Dewey is
On Tuesday 25 November 2014 16:44:01 Sebastian Kuzminsky did opine
And Gene did reply:
On 11/25/14 2:30 PM, Jeff Johnson wrote:
Last week I started a post about larger machines and parts and
working around jog while paused being missing in LCNC and I had
enough posts showing me that
On 11/25/14 3:24 PM, Gene Heskett wrote:
On Tuesday 25 November 2014 16:44:01 Sebastian Kuzminsky did opine
https://www.youtube.com/watch?v=8QGOj39I-kk
Looks a bit puzzling Seb, as we can't see how the machine is reacting, and
what he is doing with the pulldown is not visible in the backplot.
That is a bit confusing I agree. If the outputs are showing the movements
then I guess you can assume the machine is moving. I wonder how difficult
it would be to get the display to show what he is doing. Also I am sure
this is a preliminary setup so do you see some buttons or something to
On 11/25/2014 5:36 PM, Pete Matos wrote:
I am kinda
bummed to hear that Machinekit's setup does not work with the mesa stuff
which will be on both of my CNC machines here soon.
I've got a 7i43 Mesa board working with Machinekit and I have heard that
the 5i20 works fine.
I would think that the
On Tuesday 25 November 2014 17:27:32 Sebastian Kuzminsky did opine
And Gene did reply:
On 11/25/14 3:24 PM, Gene Heskett wrote:
On Tuesday 25 November 2014 16:44:01 Sebastian Kuzminsky did opine
https://www.youtube.com/watch?v=8QGOj39I-kk
Looks a bit puzzling Seb, as we can't see how
Dnia 25-11-2014 o godz. 23:36 Pete Matos napisał(a):
That is a bit confusing I agree. If the outputs are showing the movements
then I guess you can assume the machine is moving. I wonder how difficult
it would be to get the display to show what he is doing. Also I am sure
this is a
On 25 November 2014 at 21:07, a k pccncmach...@gmail.com wrote:
any between 120-220 V AC
Look on eBay and correlate to:
http://www.a-m-c.com/products/analog_brushless.html
--
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto
On 11/25/2014 02:43 PM, Viesturs Lācis wrote:
Hello!
I need to drive 2 high-speed spindle motors, 3,7 kW each. For that I
have 11 kW VFD.
The problem is that I attached motors to the drive, tried to run them,
but VFD does not increase frequency above 8-9 hertz (all the default
frequency
2014-11-25 13:58 GMT-03:00 Gene Heskett ghesk...@wdtv.com:
That is about 2x what mine can do. I think, not actually measured because
it only has a hair over 2.5 of travel.
Well this Mazak may be 1983 and for some people DC servos might
be obsolete, but when I see how they work I'm still in
2014-11-25 18:19 GMT-03:00 Dave Cole linuxcncro...@gmail.com:
Since you have limited availability of local parts; you might want to
consider using some automotive sensors such as the camshaft and
crankshaft sensors used by most cars these days.
I've replaced some on Fords over the years and
On 11/25/2014 10:30 PM, Leonardo Marsaglia wrote:
2014-11-25 18:19 GMT-03:00 Dave Cole linuxcncro...@gmail.com:
Since you have limited availability of local parts; you might want to
consider using some automotive sensors such as the camshaft and
crankshaft sensors used by most cars these
On Tuesday 25 November 2014 22:17:22 Leonardo Marsaglia did opine
And Gene did reply:
2014-11-25 13:58 GMT-03:00 Gene Heskett ghesk...@wdtv.com:
That is about 2x what mine can do. I think, not actually measured
because it only has a hair over 2.5 of travel.
Well this Mazak may be 1983 and
On 11/25/2014 2:19 PM, Dave Cole wrote:
Since you have limited availability of local parts; you might want to
consider using some automotive sensors such as the camshaft and
crankshaft sensors used by most cars these days.
Also have a look at vehicle speed sensors on the outputs of
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