2014-12-04 14:25 GMT-03:00 andy pugh bodge...@gmail.com:
If you connect the winding that is currently the output to one of the
excitations instead, then you just need to look at the ratios of the
amplitudes between excitation and output with an Oscilloscope.
I will try this with the scope in
2014-12-05 0:35 GMT-03:00 Jon Elson el...@pico-systems.com:
if you have some way of feeding a known sine wave voltage
into one of the coils,
you then measure the no-load output of another coil. You
turn the resolver
until the output reaches a peak. But, with these miniature
resolvers, you
Can you easily retrofit to encoders?
Most resolvers seems to be a different form factor or buried in the
machine making replacement with encoders difficult.
Most encoders don't like grease and oil being slung around.
Dave
On 12/3/2014 10:28 PM, Leonardo Marsaglia wrote:
2014-12-04 0:11
2014-12-04 7:37 GMT-03:00 Dave Cole linuxcncro...@gmail.com:
Can you easily retrofit to encoders?
Most resolvers seems to be a different form factor or buried in the
machine making replacement with encoders difficult.
Most encoders don't like grease and oil being slung around.
Hello Dave.
Hmm - that looks like the Quick Turn 20 universal we just got. Has the
T2 control (1985).We are in the process of starting the conversion.
I had just assumed they where 'normal' resolvers.but had decided to swap
them out for encoders. We plan on using some AMC drives for the axis
and try
2014-12-04 10:39 GMT-03:00 sam sokolik sa...@empirescreen.com:
Hmm - that looks like the Quick Turn 20 universal we just got. Has the
T2 control (1985).We are in the process of starting the conversion.
I had just assumed they where 'normal' resolvers.but had decided to swap
them out for
Hi Leonardo,
I know you are not in the USA so shipping cost may be an issue, but I
would rewire them as normal resolvers and tie them into a Mesa
resolver interface and be done with it since you have other Mesa hardware.
A drop in replacement for those encoders in a similar housing will not
be
On 4 December 2014 at 11:45, Leonardo Marsaglia
leonardomarsagli...@gmail.com wrote:
Reading about how reliable resolvers are in agressive enviroments it's what
keeps me thinking about go ahead and use them even if it's not that easy to
adapt them to LinuxCNC.
I wonder if there is anyone in
2014-12-04 11:35 GMT-03:00 Dave Cole linuxcncro...@gmail.com:
I know you are not in the USA so shipping cost may be an issue, but I
would rewire them as normal resolvers and tie them into a Mesa
resolver interface and be done with it since you have other Mesa hardware.
A drop in replacement
2014-12-04 11:56 GMT-03:00 andy pugh bodge...@gmail.com:
I wonder if there is anyone in your home country with a 7i49 board or
the Pico converter to see if they can work like an ordinary resolver?
Well, some time ago I took a look at the user's map on the LinuxCNC website
(I don't know if
We know one of the drives is marginal (and smells bad).. We have a lot
of experience and have a bunch of amc drives on hand..
We would love to use the resolvers but then we would still need encoder
inputs for the spindle. We made an executive decision to switch to
encoders. We have some
On 4 December 2014 at 15:28, sam sokolik sa...@empirescreen.com wrote:
We would love to use the resolvers but then we would still need encoder
inputs for the spindle.
I fitted a resolver to my spindle, no more difficult to do than
fitting an encoder:
On 12/03/2014 09:28 PM, Leonardo Marsaglia wrote:
Hello Jon and thank you for the explaination!
So in theory I could use them as normal resolvers and output them to
LinuxCNC as several people did.
Yes, resolvers are transformers where the coupling between
rotor and stator coils
varies as the
On 12/04/2014 05:45 AM, Leonardo Marsaglia wrote:
Well here's how it's mounted.
http://oi62.tinypic.com/2enakck.jpg It's not that hard to
replace them for encoders, only an adapting plate would be
necessary. Reading about how reliable resolvers are in
agressive enviroments it's what keeps
On 12/03/2014 07:28 PM, Leonardo Marsaglia wrote:
2014-12-04 0:11 GMT-03:00 Jon Elson el...@pico-systems.com:
There are basically two ways to run resolvers. You can
excite the rotor and get two
varying voltages from the stator coils. These will
generally be in phase with the
excitation,
2014-12-04 12:28 GMT-03:00 sam sokolik sa...@empirescreen.com:
We know one of the drives is marginal (and smells bad).. We have a lot
of experience and have a bunch of amc drives on hand..
We would love to use the resolvers but then we would still need encoder
inputs for the spindle. We
2014-12-04 13:03 GMT-03:00 Jon Elson el...@pico-systems.com:
Yes, resolvers are transformers where the coupling between
rotor and stator coils
varies as the shaft is rotated. You can excite the stator,
or the rotor, the resolver
really doesn't care.
The excite the rotor and read the two
On 4 December 2014 at 17:12, Leonardo Marsaglia
leonardomarsagli...@gmail.com wrote:
Is there any method to know the ratio of the coils?
If you connect the winding that is currently the output to one of the
excitations instead, then you just need to look at the ratios of the
amplitudes between
On 12/04/2014 09:38 AM, andy pugh wrote:
On 4 December 2014 at 15:28, sam sokolik sa...@empirescreen.com wrote:
We would love to use the resolvers but then we would still need encoder
inputs for the spindle.
I fitted a resolver to my spindle, no more difficult to do than
fitting an encoder:
On 12/04/2014 11:12 AM, Leonardo Marsaglia wrote:
Thanks a lot again Jon for making things clear for me. So
the easiest way to go would be running them like normal
resolvers feeding the excitation winding. Is there any
method to know the ratio of the coils?
if you have some way of feeding a
Hello to all again.
We're defining the hardware for the Mazak conversion and yesterday my
brother and I measured the resolver signals to identify what voltage and
frequency they use. I've been reading some information about resolvers and
it's not too difficult to understand the way they work,
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