J
Jasen Betts
Guest
On 2019-09-16, amdx <nojunk@knology.net> wrote:
looks kind of like this one:
https://www.newark.com/veeder-root/0120506-010/fubar/dp/29C9024
but hopefully less expensive!
That one does 1000 counts per minute so it should work at 360 rpm, but
that number also implies that a 30ms pulse width may be needed, which
your 1/12 dwell ratio may not reach. OTOH your DC counter may have a
faster mechanism as it doen't need to operate from AC, so no shading
rings etc.
--
When I tried casting out nines I made a hash of it.
On 9/16/2019 11:11 AM, Jeff Liebermann wrote:
On Sun, 15 Sep 2019 19:46:18 -0500, amdx <nojunk@knology.net> wrote:
I have a Root Veeder counter all it needs is a pulse, I wanted the
project to be counting the turns on a coil, not developing a circuit to
make a pulse to drive the counter.
Thanks. So now you disclose what you're trying to accomplish. I
assumed you wanted a tachometer for the drill press. So, use a hall
effect or photoelectric proximity sensor:
https://www.ebay.com/sch/i.html?_nkw=hall+effect+proximity+sensor
https://www.ebay.com/sch/i.html?_nkw=photoelectric+proximity+sensor
I'm not sure what you have from Veeder Root. If it's marginal, look
for an industrial counter or "totalizer":
https://www.ebay.com/sch/i.html?_nkw=electronic+totalizer
https://www.grainger.com/category/electrical/industrial-controls-automation-and-machine-safety/industrial-automation/meters-counters-and-plc/counters
Hi Jeff,
This should be simple although the mounting mechanics were a little
chore. I still haven't found my reed switches, but I expect that will work.
The is my counter.
https://www.dropbox.com/s/n2tx6mf6448d9by/counter.jpg?dl=0
looks kind of like this one:
https://www.newark.com/veeder-root/0120506-010/fubar/dp/29C9024
but hopefully less expensive!
That one does 1000 counts per minute so it should work at 360 rpm, but
that number also implies that a 30ms pulse width may be needed, which
your 1/12 dwell ratio may not reach. OTOH your DC counter may have a
faster mechanism as it doen't need to operate from AC, so no shading
rings etc.
--
When I tried casting out nines I made a hash of it.