Re: [Emc-users] Would this new item be of any use?

[Dave Cole]

That's basically a crankshaft position sensor.

I got the link from another guy asking if we could use it on a machine.

The gear pitch needed is .160 so at full quad the resolution should be 
.040 or about a mm.  There is a data sheet link on the Allied 
Electronics page.

The price I think was $27 via Allied but they had none in stock as it is 
a new product.  Still, pretty cheap.

Dave



On 11/10/2015 6:58 PM, Bruce Layne wrote:
> The resolution is determined by the number of teeth on the gear that is
> being sensed by the two Hall effect sensors in that integrated Honeywell
> sensor.  For example, if you had a 100 tooth gear, you'd have 400
> quadrature state changes per revolution.  A spindle speed sensor doesn't
> really need much resolution.
>
> As others have stated, there is no index pulse, so you'd need to add
> that for a spindle encoder if you wanted rigid tapping, but if you only
> wanted a spindle speed indicator, this should do the trick.
>
> The sensor looks very durable, mechanically.  Two discrete Hall effect
> sensors that we'd bend around until they were in a quadrature generating
> alignment would be cheaper, but not nearly as durable. It also looks
> like Honeywell put enough electronics in there to provide some much
> better noise immunity than discrete Hall effect sensors would probably have.
>
>
>
> On 11/10/2015 06:40 PM, Gene Heskett wrote:
>> Certainly a decent price, but zero mention of its resolution?
>
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Re: [Emc-users] Would this new item be of any use?

[andy pugh]

On 11 November 2015 at 16:32, Dave Cole  wrote:
> That's basically a crankshaft position sensor.

Some CPSes use a magnetic track (I have a few in a drawer).
They typically use a missing tooth (normally just a shorter tooth,
when it is a tooth) for index.
It would be nice to add missing-tooth index to the linuxcnc encoder.

> The gear pitch needed is .160 so at full quad the resolution should be
> .040 or about a mm.  There is a data sheet link on the Allied
> Electronics page.

You will get a distorted but usable quadrature for quite a range
around that, however.

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Re: [Emc-users] Would this new item be of any use?

[Dave Cole]

On 11/11/2015 12:23 PM, andy pugh wrote:
> On 11 November 2015 at 16:32, Dave Cole  wrote:
>> That's basically a crankshaft position sensor.
> Some CPSes use a magnetic track (I have a few in a drawer).
> They typically use a missing tooth (normally just a shorter tooth,
> when it is a tooth) for index.
> It would be nice to add missing-tooth index to the linuxcnc encoder.
>
>> The gear pitch needed is .160 so at full quad the resolution should be
>> .040 or about a mm.  There is a data sheet link on the Allied
>> Electronics page.
> You will get a distorted but usable quadrature for quite a range
> around that, however.

> >>Some CPSes use a magnetic track (I have a few in a drawer).

That does not surprise me at all.   I was wondering if Honeywell hadn't 
already sent you a few samples of that part.  :-)

Dave

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Re: [Emc-users] Would this new item be of any use?

[andy pugh]

On 10 November 2015 at 18:53, Greg Bentzinger  wrote:
> Got an advert for this since I am an Allied customer and was wondering if 
> this would be useful as a spindle sensor.
>
> http://www.alliedelec.com/lp/151110/honeywell/?utm_source=prod_medium=email_campaign=151110_product

It looks perfect for any machine with a gear on the spindle. (I had to
read a long way into the datasheet before I was sure it didn't need a
magnetic target).
For many applications you would also need a separate index.

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Re: [Emc-users] Would this new item be of any use?

[John Dammeyer]

I too got that advertisement.  If your spindle has a suitably fine gear on
it I think it would work fine.  You'd still need to add a second sensor for
an index position in order to either thread or position the spindle for a
toolchanger.
John

> -Original Message-
> From: Greg Bentzinger [mailto:skullwo...@yahoo.com]
> Sent: November-10-15 10:54 AM
> To: emc-users@lists.sourceforge.net
> Subject: [Emc-users] Would this new item be of any use?
> 
> 
> Got an advert for this since I am an Allied customer and was wondering if
> this would be useful as a spindle sensor.
> 
> http://www.alliedelec.com/lp/151110/honeywell/?utm_source=prod
> _medium=email_campaign=151110_product
> 
>

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Re: [Emc-users] Would this new item be of any use?

[Bruce Layne]

The resolution is determined by the number of teeth on the gear that is 
being sensed by the two Hall effect sensors in that integrated Honeywell 
sensor.  For example, if you had a 100 tooth gear, you'd have 400 
quadrature state changes per revolution.  A spindle speed sensor doesn't 
really need much resolution.

As others have stated, there is no index pulse, so you'd need to add 
that for a spindle encoder if you wanted rigid tapping, but if you only 
wanted a spindle speed indicator, this should do the trick.

The sensor looks very durable, mechanically.  Two discrete Hall effect 
sensors that we'd bend around until they were in a quadrature generating 
alignment would be cheaper, but not nearly as durable. It also looks 
like Honeywell put enough electronics in there to provide some much 
better noise immunity than discrete Hall effect sensors would probably have.



On 11/10/2015 06:40 PM, Gene Heskett wrote:
> Certainly a decent price, but zero mention of its resolution?


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Re: [Emc-users] Would this new item be of any use?

[Gene Heskett]

On Tuesday 10 November 2015 13:53:55 Greg Bentzinger wrote:

> Got an advert for this since I am an Allied customer and was wondering
> if this would be useful as a spindle sensor.
>
> http://www.alliedelec.com/lp/151110/honeywell/?utm_source=prod_med
>ium=email_campaign=151110_product
>
Certainly a decent price, but zero mention of its resolution?  We need 
specs, and they aren't there.  The datasheet also will not dl for 
iceweasel.  Good price, but color me un-impressed until I see some real 
specs.

Cheers, Gene Heskett
-- 
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 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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Re: [Emc-users] Would this new item be of any use?

[Gene Heskett]

On Tuesday 10 November 2015 14:07:34 andy pugh wrote:

> On 10 November 2015 at 18:53, Greg Bentzinger  
wrote:
> > Got an advert for this since I am an Allied customer and was
> > wondering if this would be useful as a spindle sensor.
> >
> > http://www.alliedelec.com/lp/151110/honeywell/?utm_source=prod_m
> >edium=email_campaign=151110_product
>
> It looks perfect for any machine with a gear on the spindle. (I had to
> read a long way into the datasheet before I was sure it didn't need a
> magnetic target).
> For many applications you would also need a separate index.

How did you get the datasheet?


Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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Re: [Emc-users] Would this new item be of any use?

[Gene Heskett]

On Tuesday 10 November 2015 18:58:01 Bruce Layne wrote:

> The resolution is determined by the number of teeth on the gear that
> is being sensed by the two Hall effect sensors in that integrated
> Honeywell sensor.  For example, if you had a 100 tooth gear, you'd
> have 400 quadrature state changes per revolution.  A spindle speed
> sensor doesn't really need much resolution.
>
> As others have stated, there is no index pulse, so you'd need to add
> that for a spindle encoder if you wanted rigid tapping, but if you
> only wanted a spindle speed indicator, this should do the trick.
>
> The sensor looks very durable, mechanically.  Two discrete Hall effect
> sensors that we'd bend around until they were in a quadrature
> generating alignment would be cheaper, but not nearly as durable. It
> also looks like Honeywell put enough electronics in there to provide
> some much better noise immunity than discrete Hall effect sensors
> would probably have.
>
Interesting.  An opto, reflective style, watching a mark go around would 
serve as an index I'd assume.  I did not pay enough attention if its 
size was even noted, but something like that, watching the bottom gear 
on the toys spindle might be just what the Dr. ordered.  The gear is at 
least a 50 toother, maybe a few more.

> On 11/10/2015 06:40 PM, Gene Heskett wrote:
> > Certainly a decent price, but zero mention of its resolution?
>
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Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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