I am working on getting 4th axis to work. While it does move as commanded,
it does so in a visibly jerky way.
At first I thought that it was mechanical issue inside the rotary table,
such as rust, poor gear meshing, eccentricity etc.
I took off the motor and even the lovejoy coupling. The motor,
4th axis motor rotor movement
I am working on getting 4th axis to work. While it does move as commanded,
it does so in a visibly jerky way.
At first I thought that it was mechanical issue inside the rotary table,
such as rust, poor gear meshing, eccentricity etc.
I took off the motor
...
From this, I conclude that this is a feedback based issue, such as the
resolver or resolver converter somehow being behind and ahead on reporting
its position, which leads to uneven rate of speed.
Any ideas?
Sounds like classic quadrature error in the resolver. Are you sure you
Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: [Emc-users] Jerky 4th axis motor rotor movement
I am working on getting 4th axis to work. While it does move as
commanded,
it does so in a visibly jerky way.
At first I thought that it was mechanical issue inside the rotary
@lists.sourceforge.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: [Emc-users] Jerky 4th axis motor rotor movement
I am working on getting 4th axis to work. While it does move as
commanded,
it does so in a visibly jerky way.
At first I thought that it was mechanical
On Sat, Jan 29, 2011 at 07:43:42AM -0600, Igor Chudov wrote:
The way this system works is that the motor has a little tiny toothed belt
going to the resolver, wires from resolver go into Resolver to Quadrature
Encoder Converter
I have three of these -- they work great. There is a
On Sat, Jan 29, 2011 at 2:00 PM, Chris Radek ch...@timeguy.com wrote:
On Sat, Jan 29, 2011 at 07:43:42AM -0600, Igor Chudov wrote:
The way this system works is that the motor has a little tiny toothed
belt
going to the resolver, wires from resolver go into Resolver to
Quadrature
Though it appears obvious that you aren't having this problem, since
on a lot of discussions on PID timing, people seem to overlook this, I
just want to mention this for the one guy listening who might be bitten
by this otherwise.
When you take a servo motor off a machine, you unload a
I agree, but what I saw was not PID oscillations. This only occurred during
moves.
I do think very strongly that I see some deficiency in resolver output.
i
On Sat, Jan 29, 2011 at 2:42 PM, cogoman cogo...@optimum.net wrote:
Though it appears obvious that you aren't having this problem,
Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
Subject: [Emc-users] Jerky 4th axis motor rotor movement
I am working on getting 4th axis to work. While it does move as
commanded,
it does
On Saturday, January 29, 2011 04:25:23 pm Igor Chudov did opine:
On Sat, Jan 29, 2011 at 2:00 PM, Chris Radek ch...@timeguy.com wrote:
On Sat, Jan 29, 2011 at 07:43:42AM -0600, Igor Chudov wrote:
The way this system works is that the motor has a little tiny
toothed
belt
going
On 29 January 2011 19:51, Igor Chudov ichu...@gmail.com wrote:
What sort of a DVM would work?
One set to measure AC RMS.
--
atp
Torque wrenches are for the obedience of fools and the guidance of wise men
--
Special
Igor Chudov wrote:
I am working on getting 4th axis to work. While it does move as commanded,
it does so in a visibly jerky way.
At first I thought that it was mechanical issue inside the rotary table,
such as rust, poor gear meshing, eccentricity etc.
I took off the motor and even the
On Sat, Jan 29, 2011 at 6:38 PM, Jon Elson el...@pico-systems.com wrote:
Igor Chudov wrote:
I am working on getting 4th axis to work. While it does move as
commanded,
it does so in a visibly jerky way.
At first I thought that it was mechanical issue inside the rotary table,
such as
Another finding, somewhat surprising.
These speedups/slowdowns occur four times in a complete circles. This
means that as the shaft turns one full turn, it would slow down four times
and speed up four times. So, something happens in every quarter of a full
turn.
i
Been reading the datasheet for the resolver: 11BRW-300-F10-10.pdf
http://igor.chudov.com/manuals/Harowe-Resolvers/11BRW-300-F10-10.pdf
It calls for input voltage of 12 volts. I think that I give it much less
than that, 4.7 volts or so.
This could explain why things are bad in every
On Sunday, January 30, 2011 12:25:41 am Igor Chudov did opine:
Been reading the datasheet for the resolver: 11BRW-300-F10-10.pdf
http://igor.chudov.com/manuals/Harowe-Resolvers/11BRW-300-F10-10.pdf
It calls for input voltage of 12 volts. I think that I give it much less
than
Complete and perfect answer found, see my email titled complete victory
over resolver.
The answer is that I had to reconfigure PICO resolver converter board to use
a lower input voltage. But see my other email for full detail.
Igor Chudov wrote:
Jon, assuming that the jerky movement of the motor is due to bad reading of
resolver, EMC2 may think that the motor actually moves smoothly.
Yes, that is possible! If the resolver is fouled up in some manner,
there may be a large bunching of counts coming out of the
Igor Chudov wrote:
Another finding, somewhat surprising.
These speedups/slowdowns occur four times in a complete circles. This
means that as the shaft turns one full turn, it would slow down four times
and speed up four times. So, something happens in every quarter of a full
turn.
Yes,
Igor Chudov wrote:
Been reading the datasheet for the resolver: 11BRW-300-F10-10.pdf
http://igor.chudov.com/manuals/Harowe-Resolvers/11BRW-300-F10-10.pdf
It calls for input voltage of 12 volts. I think that I give it much less
than that, 4.7 volts or so.
The resolver is a
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