On 27 November 2014 at 06:56, Gregg Eshelman wrote:
> Are the plastic Micro mill gears standard metric or are they some
> proprietary "just about right" dimensions? If they're something standard
> then a call to Boston Gear should get you something you can modify to
> replace the originals. At lea
On Thursday 27 November 2014 01:56:44 Gregg Eshelman did opine
And Gene did reply:
> On 11/26/2014 11:12 PM, Gene Heskett wrote:
> > On Wednesday 26 November 2014 23:11:00 Gregg Eshelman did opine
> >
> >> For the Mini Mill there's a belt conversion and there's metal gears
> >> available for the m
On 11/26/2014 11:12 PM, Gene Heskett wrote:
> On Wednesday 26 November 2014 23:11:00 Gregg Eshelman did opine
>> For the Mini Mill there's a belt conversion and there's metal gears
>> available for the mill and the 7x lathes.
>
> Metal, for the micro-mill? URL?
>
> Chris has metal change gears for
On Wednesday 26 November 2014 23:11:00 Gregg Eshelman did opine
And Gene did reply:
> On 11/26/2014 10:32 AM, Gene Heskett wrote:
> > On Wednesday 26 November 2014 02:56:00 Gregg Eshelman did opine
> >
> >> Also have a look at vehicle speed sensors on the outputs of
> >> transmissions. In the late
On 11/26/2014 10:32 AM, Gene Heskett wrote:
> On Wednesday 26 November 2014 02:56:00 Gregg Eshelman did opine
>> Also have a look at vehicle speed sensors on the outputs of
>> transmissions. In the later 90's General Motors went to a 40 tooth
>> reluctor and a Hall effect sensor on the output shaf
On 26 November 2014 at 17:32, Gene Heskett wrote:
>
> That whole shebang may leave as I am about worn out replacing its plastic
> gears anyway. Noisy, sloppy crap.
You can probably get metal replacement gears from LittleMachineshop.
But they are even more noisy.
Even with a full oil bath they bo
2014-11-25 1:19 GMT+02:00 Leonardo Marsaglia
:
> Hello guys!
>
> I found some 360 ppr encoders that are really cheap on ebay. Here's the
> link:
>
>
> http://www.ebay.com/itm/NEW-Incremental-Rotary-Encoder-360p-r-6mm-Shaft-5-24vdc-/290778909653?pt=LH_DefaultDomain_0&hash=item43b3c60bd5
>
> The ma
On Wednesday 26 November 2014 04:16:05 Gregg Eshelman did opine
And Gene did reply:
> On 11/26/2014 12:10 AM, Gene Heskett wrote:
> > Is GM's patent on hydraulic roller tappets still in force? They were
> > royalty hungry yet in the late 40's & clear into the 70's with that,
> > first designed and
On Wednesday 26 November 2014 02:56:00 Gregg Eshelman did opine
And Gene did reply:
> 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
On Tue, Nov 25, 2014 at 10:17 PM, Leonardo Marsaglia <
leonardomarsagli...@gmail.com> wrote:
>
>
> As always I like how you describe things like this :). I'm really out of my
> field wich such a monster like that, but I can imagine that phenomenal gas
> mileage back then is almost against the law
On 11/26/2014 12:10 AM, Gene Heskett wrote:
> Is GM's patent on hydraulic roller tappets still in force? They were
> royalty hungry yet in the late 40's & clear into the 70's with that, first
> designed and used in the 35 V16 engines they made for the biggest Caddies
> from 35 to 37. Except for
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
transm
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 :
> > 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 p
On 11/25/2014 10:30 PM, Leonardo Marsaglia wrote:
> 2014-11-25 18:19 GMT-03:00 Dave Cole :
>
>> 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 re
2014-11-25 18:19 GMT-03:00 Dave Cole :
> 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 they typically fit
2014-11-25 13:58 GMT-03:00 Gene Heskett :
> 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 love with them.
On 25 November 2014 at 21:19, Dave Cole 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 indexing scheme, and
On 11/25/2014 11:46 AM, andy pugh wrote:
> On 25 November 2014 at 16:11, Leonardo Marsaglia
> 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 en
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 :
> > 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
On 25 November 2014 at 16:11, Leonardo Marsaglia
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 2.844
2014-11-25 7:28 GMT-03:00 andy pugh :
> 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 - 1M, so I guess i
2014-11-25 0:40 GMT-03:00 Gene Heskett :
> 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 little harder
On 25 November 2014 at 02:10, Leonardo Marsaglia
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 it, you don't own it.
http://w
On 11/24/2014 07:26 PM, Leonardo Marsaglia wrote:
> 2014-11-24 22:19 GMT-03:00 Leonardo Marsaglia > :
>> It's tempting also ,in my case, to machine a 360 teeth gear and use these
>> sensors only. If they do the trick it's a good solution too.
>>
> Mod 1.0 is like 362 mm in diameter. So unless the s
On Monday 24 November 2014 20:19:41 Leonardo Marsaglia did opine
And Gene did reply:
> 2014-11-24 21:56 GMT-03:00 andy pugh :
> > People list them on eBay, cheaper than Digikey.
> > http://www.ebay.com/itm/ATS667LSGTN-T-Gear-Tooth-Sensor-IC-/151062958
> > 754 As a randomly-chosen example
>
> I gue
On Monday 24 November 2014 18:54:46 andy pugh did opine
And Gene did reply:
> On 24 November 2014 at 23:41, Leonardo Marsaglia
>
> wrote:
> > Because in my head I'm picturing the rise and fall signals and I'm
> > worried about where the zero rising point will fall, but may be it's
> > not that im
2014-11-24 22:46 GMT-03:00 andy pugh :
> However, if you already have a gear on the spindle, it can be a good
> solution.
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. But I guess I'll
be using the encoder and
On 25 November 2014 at 01:26, Leonardo Marsaglia
wrote:
> Mod 1.0 is like 362 mm in diameter. So unless the sensors are capable of
> sense it, it's not worth it to make the gear.
However, if you already have a gear on the spindle, it can be a good solution.
--
atp
If you can't fix it, you don'
2014-11-24 22:19 GMT-03:00 Leonardo Marsaglia :
> It's tempting also ,in my case, to machine a 360 teeth gear and use these
> sensors only. If they do the trick it's a good solution too.
>
Mod 1.0 is like 362 mm in diameter. So unless the sensors are capable of
sense it, it's not worth it to make
2014-11-24 21:56 GMT-03:00 andy pugh :
> People list them on eBay, cheaper than Digikey.
> http://www.ebay.com/itm/ATS667LSGTN-T-Gear-Tooth-Sensor-IC-/151062958754
> As a randomly-chosen example
>
I guess they should sell them here too. I will check tomorrow.
It's tempting also ,in my case, to m
On 25 November 2014 at 00:30, Leonardo Marsaglia
wrote:
> Nice. I will check for those sensors, I hope I can get them or something
> like that here in Argentina because if I have to buy them from Digikey as
> Jon did I will have to spend a lot more on shipping than on the sensors.
People list the
2014-11-24 21:13 GMT-03:00 dave :
> Take a look on Jon Elson's site for the automotive sensor he used for
> spindle encoding and direction. They should certainly work for an index.
>
Nice. I will check for those sensors, I hope I can get them or something
like that here in Argentina because if I
Take a look on Jon Elson's site for the automotive sensor he used for
spindle encoding and direction. They should certainly work for an index.
Dave
On 11/24/2014 04:02 PM, Leonardo Marsaglia wrote:
> 2014-11-24 20:54 GMT-03:00 andy pugh :
>
>> The delay is likely to be consistent, so as long as t
2014-11-24 20:54 GMT-03:00 andy pugh :
> The delay is likely to be consistent, so as long as the spindle speed
> stays the same (and it normally does in threading) then you won't
> notice.
>
That's excellent then. It's going to be for threading but mostly I would
like to test your method for non
2014-11-24 20:44 GMT-03:00 Dave Cole :
> Check the specs on the prox switch you want to use. Some are fairly
> slow to respond.
> Probably an attempt at noise reduction.
>
Well these encoders work at maximum frequency of 20 Khz, I don't know the
common timing responses for proximity switches. 2
On 24 November 2014 at 23:41, Leonardo Marsaglia
wrote:
> Because in my head I'm picturing the rise and fall signals and I'm worried
> about where the zero rising point will fall, but may be it's not that
> important.
The delay is likely to be consistent, so as long as the spindle speed
stays the
if you connect an encoder to a motor
you have a coupler
could you add a disc to the coupler
and a notch in the disc
and add an interrupter?
this makes it quite like a std encoder with ABZ phases
regards
TomP
tjtr33
On 11/24/2014 05:44 PM, Dave Cole wrote:
> Check the specs on the prox switch you w
Check the specs on the prox switch you want to use. Some are fairly
slow to respond.
Probably an attempt at noise reduction.
Dave
On 11/24/2014 6:19 PM, Leonardo Marsaglia wrote:
> Hello guys!
>
> I found some 360 ppr encoders that are really cheap on ebay. Here's the
> link:
>
> http://www.eb
2014-11-24 20:27 GMT-03:00 andy pugh :
> It should work well, and also means that you don't have to gear the
> encoder 1:1 with the spindle, so can have more PPR and a more compact
> installation.
>
Thanks as always Andy!
Do you think the thickness of the sensing area and probe, combined with th
On 24 November 2014 at 23:19, Leonardo Marsaglia
wrote:
> I was planning to use them for a spindle and I thought about replacing the
> Z pulse to reset the counters and stablish the zero position using an
> external proximity sensor mounted somewhere on the spindle. Do you think
> this is a good a
Hello guys!
I found some 360 ppr encoders that are really cheap on ebay. Here's the
link:
http://www.ebay.com/itm/NEW-Incremental-Rotary-Encoder-360p-r-6mm-Shaft-5-24vdc-/290778909653?pt=LH_DefaultDomain_0&hash=item43b3c60bd5
The matter is they only come with A and B pulses, no index pulse
capab
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