On 21 August 2010 18:21, Jon Elson wrote:
> OK, this is the type of scale used with an interpolator. It needs to
> measure the analog voltage of the two sine quadrature signals and then
> solve the equation to figure out the position on a circle the arcsin and
> arccos work out to.
I think my p
dambacher-retrofit.de wrote:
> Am 20.08.2010 18:55, schrieb Jon Elson:
>
>> dambacher-retrofit.de wrote:
>>
>>> Do you know if there is something similar for old philips glass scales?
>>>
>>>
>> If these are analog scales of sufficient basic resolution, a comparator
>> chip can b
Am 20.08.2010 18:55, schrieb Jon Elson:
> dambacher-retrofit.de wrote:
>> Do you know if there is something similar for old philips glass scales?
>>
> If these are analog scales of sufficient basic resolution, a comparator
> chip can be set up pretty easily to convert sine-wave scales to
> dig
On 19 August 2010 22:31, dambacher-retrofit.de
wrote:
A HAL encoder function works pretty well, though a low pass filter
helps to steady the pycvp dial.
> A resolver is tricky, you need to excite it with a sinus signal of a given
> frequency
I found a way to do three channels with a $20 Arduino
dambacher-retrofit.de wrote:
> Do you know if there is something similar for old philips glass scales?
>
If these are analog scales of sufficient basic resolution, a comparator
chip can be set up pretty easily to convert sine-wave scales to
digital. Basically, they compare each signal to a se
Am 20.08.2010 00:59, schrieb dave:
> On Thu, 2010-08-19 at 23:31 +0200, dambacher-retrofit.de wrote:
>> you could use commecial circuits but not at that price I think:
>> http://www.maccon.de/fileadmin/FTPROOT/2785500.pdf
>
> If you are lucky/unlucky enough to have a resolver then check Jon
> Els
Jon Elson writes:
> The EMC encoder HAL component has an option to count pulses from a
> single signal (as opposed to a standard encoder with two signals in
> quadrature).
Ulf, Dave, and Jon:
Thanks for the assists. You've given me direction and now I'll dig into the
docs to understand an
Rick Calder wrote:
> No, neither. I have made a few tachometers using Atmel microcontrollers. The
> sensor, either a hall effect or optical, just sends pulses and the
> microcontroller counts them up and handles the display. Another one I made
> had
> counter chips and the microcontroller basic
Rick,
I think if you pipe that pulse stream into an EMC2 encoder input you can
determine the velocity via a derivative function ( also a component in Hal).
Look at the developers manual for HAL and the encoder component and
derivative component. I should be easy to setup once you become
famil
On Thu, 2010-08-19 at 23:31 +0200, dambacher-retrofit.de wrote:
> Hi Rick
>
> Do you have a tachogenerator or an resolver?
>
> a tachogenerator is like a dynamo giving a sinus voltage/current wich is
> proportional to the revolutions. You can use a rectifier circuit and measuere
> the effective v
dambacher-retrofit.de writes:
>
> Hi Rick
>
> Do you have a tachogenerator or an resolver?
>
> a tachogenerator is like a dynamo giving a sinus voltage/current wich is
> proportional to the revolutions. You can use a rectifier circuit and measuere
> the effective voltage via a/d
>
> A resolv
Hi Rick
Do you have a tachogenerator or an resolver?
a tachogenerator is like a dynamo giving a sinus voltage/current wich is
proportional to the revolutions. You can use a rectifier circuit and measuere
the effective voltage via a/d
A resolver is tricky, you need to excite it with a sinus signa
I'd like to hook up a tachometer sensor to my mill. My idea is to have emc2
count/process the input stream of pulses and display the rpm on a pyVCP dial.
I've tried searching the archives, and cnczone, without finding info on how to
implement this.
Any ideas ?
TIA,
Rick
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