Re: [Emc-users] snagged touch probe on eBay - anybody know how to interface ?

[hubert]

Hi All

This thread and it's follow on triggered my interest, so I just snagged 
a Renishaw MP3 probe on Ebay and now face the task of interfacing this 
to my New CNC mill which I am due to pickup later this week.  I ordered 
the mill with LinuxCNC using the Mesa cards to interface to the 
computer.  The mill uses Servo's on X,Y,Z.  It is a small mill with a 12 
position tool changer, thus I am hoping to put the probe in one of the 
pockets and use it to sense work-piece position, and also to digitize.  
While this is my Hobby mill I am hoping to get close to 100micro inches 
repeatability.  I would appreciate any pointers to available data for 
building/buying a relatively inexpensive transmitter receiver for this 
purpose.


On 9/8/16 11:07 AM, Jon Elson wrote:
> On 09/08/2016 09:56 AM, Florian Rist wrote:
>> Hi Jon
>>
>>> Yes, I thought about building a receiver out of various
>>> parts, but there are application specific parts that combine
>>> all this in one unit.  Most are made with 38 KHz band pass
>>> filters for VCR remote controls,
>> Yes, that's why I didn't even look into theses integrated devices.
>>
>>> but the QSE159 does not
>>> have the BPF, looked to be sensitive enough, and was really
>>> cheap ($1.06)
>> Indeed, interesting.
>>
>> Not sure if it is sensitive enough, 0.25 mW/cm² worst case translates to
>> 2.5W/m², that's quite a lot. But, now that I started looking, there are
>> quite a few similar integrated devices available, some with much high
>> sensitivity down to at least 10µW/cm². However most are lacking the
>> Schmitt-trigger of the QSE159, nice part, that you found, I'm going to
>> get one, too.
>>
>>
> I have no idea what the radiated power of the Blum probe is,
> but it has 12 big surface-mount LEDs arranged around the
> periphery.  The QSE sensor picks it up very well out past
> 6", which is all the sensitivity I will need.
>
> Jon
>
> --
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users


--
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] xl pulleys

[Gene Heskett]

On Monday 19 September 2016 13:53:23 Andy Pugh wrote:

> > On 19 Sep 2016, at 08:09, Gene Heskett  wrote:
> >
> > Do any of you know of a pulley maker that can supply a large hub in
> > in a 40 tooth pulley that is also more than an inch wide at the hub?
>
> I have the hob to make T5 pulleys.

Yeah, but my GMC doesn't have pontoons and paddlewheels. ;-)

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 

--
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] xl pulleys

[Gene Heskett]

On Monday 19 September 2016 12:54:00 Jon Elson wrote:

> On 09/19/2016 12:09 AM, Gene Heskett wrote:
> > Greetings all;
> >
> > Do any of you know of a pulley maker that can supply a large hub in
> > in a 40 tooth pulley that is also more than an inch wide at the hub?
>
> I always buy my pulleys with undersize bores and bore them
> out. Stock sintered pulleys are typically WAY off center.
> For flanged pulleys, you make a ring out of aluminum on the
> lathe that has an ID very close to the diameter of the lands
> on the pulley, and an OD larger than the flange.  The
> thinckess of the ring should be a hair less than the space
> between flanges.  You cut the ring into two halves, put them
> on the pulley and you can turn it accurately in the lathe.
> McMaster-Carr has a fair selection of XL pulleys.
>
> If the hub is too small, you can just remove the hub and
> bore right through the teeth to insert the setscrews in the
> body of the pulley.
>
> Jon
>
I investigated my stock of mine shafting today and found it wanting.  I 
need about 1.3125 to clear the OD of the shaft bearing sticking out of 
the front of the saddle, then another quarter inch to make the sleeve 
the  bored out pulley will be pressed onto.  So I'll need some 1.75" 
shafting, about 3" long. I think I know where there might be some at 
recycle yard prices, but its a fair drive of around 60 miles one way 
over a copperhead trail, winding up about 4 miles from Grafton WV from 
here. The shafting they have is maybe 4130 steel.  Fun to machine. But I 
made some sliding fin motor couplings out of it about a decade back, 
that still have zero backlash today. While I am there, see if they have 
any 3" wide steel at least 3/8" thick. I need to make a new table insert 
for my bandsaw. One that sits flush, the oem plastic sat about 30 thou 
low.

So the pressed on pulley seems like the best idea so far.  Making that 
hub on TLM will take a while, but if I do it right it will be pretty 
concentric.

If that fails, then $76 something will get me 8" of it in alu from HM.  
Bore to suit.  Save leftovers.

Thanks Jon.

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 

--
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] xl pulleys

[Andy Pugh]

> On 19 Sep 2016, at 08:09, Gene Heskett  wrote:
> 
> Do any of you know of a pulley maker that can supply a large hub in in a 
> 40 tooth pulley that is also more than an inch wide at the hub?

I have the hob to make T5 pulleys. 

--
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] xl pulleys

[Jon Elson]

On 09/19/2016 12:09 AM, Gene Heskett wrote:
> Greetings all;
>
> Do any of you know of a pulley maker that can supply a large hub in in a
> 40 tooth pulley that is also more than an inch wide at the hub?
>
>
>
I always buy my pulleys with undersize bores and bore them 
out. Stock sintered pulleys are typically WAY off center.  
For flanged pulleys, you make a ring out of aluminum on the 
lathe that has an ID very close to the diameter of the lands 
on the pulley, and an OD larger than the flange.  The 
thinckess of the ring should be a hair less than the space 
between flanges.  You cut the ring into two halves, put them 
on the pulley and you can turn it accurately in the lathe.  
McMaster-Carr has a fair selection of XL pulleys.

If the hub is too small, you can just remove the hub and 
bore right through the teeth to insert the setscrews in the 
body of the pulley.

Jon

--
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] xl pulleys

[Gene Heskett]

On Monday 19 September 2016 06:56:00 Rick Lair wrote:

> Check this place out Gene,
>
> http://www.hmmanufacturing.com/pulley-stock1.html
>
> I just bought some stuff from there, good quality, great price. We
> have a situation on our edm machine where the standard sheaves
> available weren't wide enough, and I found these guys.
>
>
> Hope it helps,
>
> Rick

Yes I think it does. One spec is missing in that huge pulldown, and that 
is the shank's diameter. If I can saw off about an inch & a half, center 
it up, bore to 8mm's from the front of the shank and drill/tap for some 
4mm set screws with enough meat left to hold things tight. then turn it 
around & counterbore enough to surround the stickout of the OEM 
crankholder which I've fitted with torrington roller cartridges and 
roller thrust washers, faceing it off to just clear the new apron panel 
I made, then the belt pulley on the motor could be turned around so its 
setscrews are in front, the belt tension would easier on the motor, and 
the tension would be pretty much centered between the 2 torrington 
cartridges.  I like that, a lot.

I have already bought other 40 toothers for the z drive or I could make 
those from the leftovers.  Had a heck of a time finding a 40 with a 15 
mm bore, but thats what this motors shaft is. I'll drive z 1/1 but thru 
a timing belt.  All thats yet to be built.  The bellows I'll use for z 
screw covers have arrived, so now I know how big an end terminator I'll 
have to make 4 of to clamp them to. And it appears I'll have to make 
vents in these mounts, these bellows have none.

Once I get this block of cast in TLM's chuck reduced in height to match 
the old compound, I can get to work on some other stuff. I can mill the 
width of the slot that Phase-II mounts by once a big keyhole tool 
arrives, and make the holes for the holdown bolts, that part s/b ready 
to use.  Only two bolts bothers me so I might make 2 more.

Considering I'll have time in making it, still $70 something beats the 
heck out of that other 4 letter place. They wanted $270 for a lot 
simpler pulley.

Thanks Rick.  This was helpfull.

> On 09/19/2016 01:09 AM, Gene Heskett wrote:
> > Greetings all;
> >
> > Do any of you know of a pulley maker that can supply a large hub in
> > in a 40 tooth pulley that is also more than an inch wide at the hub?
> >
> >
> > I find that to align a belt on the X drive, that I have to find a
> > pulley with an 8mm bore, but around 2" wide at the hub, because I am
> > going to have to bore it away under the belt to allow it to sit on
> > the X drive shaft with an offset of at east an inch so that it can
> > be aligned with the pulley on the motor.
> >
> > I just went thru 18 pages of ebay without finding a pulley with a
> > hub wider than 1".
> >
> > So its either a long hub, or I make the adaptor, which means the
> > pulley will need bored out to at least 1.375" in diameter in order
> > to fit over the adapter's outer cylinder, perhaps all the way thru. 
> > Maybe even make a flange on the adapter that a thin webbed pulley
> > might be bolted to.  Obviously I don't relish that idea. Doable,
> > yes. A time sink, double yes.
> >
> > I did see ebay had some 2/1 and 3/1 step drives that might give that
> > much axial offset, but they were for wider belts and even a 2/1
> > would impinge on the gear ratio, possible messing with the
> > performance of a G76's end of stroke retraction.
> >
> > I'm not terribly interested in dealing with that one custom pulley
> > maker, having been quoted $272 for the metal version of the plastic
> > one I can get from LMS for $4.50 + ship.
> >
> > So if anyone knows of other alternatives, I'm all eyeballs.
> >
> > Thanks everybody.

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 

--
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] xl pulleys

[Rick Lair]

Check this place out Gene,

http://www.hmmanufacturing.com/pulley-stock1.html

I just bought some stuff from there, good quality, great price. We have
a situation on our edm machine where the standard sheaves available
weren't wide enough, and I found these guys.


Hope it helps,

Rick


On 09/19/2016 01:09 AM, Gene Heskett wrote:
> Greetings all;
>
> Do any of you know of a pulley maker that can supply a large hub in in a 
> 40 tooth pulley that is also more than an inch wide at the hub?
>
>
> I find that to align a belt on the X drive, that I have to find a pulley 
> with an 8mm bore, but around 2" wide at the hub, because I am going to 
> have to bore it away under the belt to allow it to sit on the X drive 
> shaft with an offset of at east an inch so that it can be aligned with 
> the pulley on the motor.
>
> I just went thru 18 pages of ebay without finding a pulley with a hub 
> wider than 1".
>
> So its either a long hub, or I make the adaptor, which means the 
> pulley will need bored out to at least 1.375" in diameter in order to 
> fit over the adapter's outer cylinder, perhaps all the way thru.  Maybe 
> even make a flange on the adapter that a thin webbed pulley might be 
> bolted to.  Obviously I don't relish that idea. Doable, yes. A time 
> sink, double yes.
>
> I did see ebay had some 2/1 and 3/1 step drives that might give that much 
> axial offset, but they were for wider belts and even a 2/1 would impinge 
> on the gear ratio, possible messing with the performance of a G76's end 
> of stroke retraction.
>
> I'm not terribly interested in dealing with that one custom pulley maker, 
> having been quoted $272 for the metal version of the plastic one I can 
> get from LMS for $4.50 + ship.
>
> So if anyone knows of other alternatives, I'm all eyeballs.
>
> Thanks everybody.
>
> Cheers, Gene Heskett

-- 
Thanks


Rick Lair
Superior Roll & Turning LLC
399 East Center Street
Petersburg MI, 49270
PH: 734-279-1831
FAX: 734-279-1166
www.superiorroll.com


--
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] xl pulleys

[Gene Heskett]

On Monday 19 September 2016 02:22:49 Dave Caroline wrote:

> HPC gears in the UK make pulleys in the same way as I do and list the
> intermediate stage in their catalogue, see
> http://www.hpcgears.com/n/products/15.toothed_bar_stock/toothed_bar_st
>ock.php
>
> or make a hub assembly and press fit any gear on

I was afraid of that. But I'll have to cobble up the press, probably from a 3 
legged gear puller.

Getting a pulley I already have, bored concentric is part of the problem since 
I don't have chuck jaws that can grip it on the pulley, but on the flanges. 
None of the flanges I have checked are concentric with the shaft bores because 
thats actually a 3 piece assembly pressed together. Resting on the flange, the 
bores aren't even perpendicular. Chuck jaws grab both flanges, tipping it, and 
I wind up taking a stroke or 7 with a file before a dial says I'm good. A pima. 
But you knew all that. ;-)

I'll sort something out. But I'll have to fix my bandsaw first.

I have a 111 inch metal cutting blade for it on order, and then I have to make 
a new table insert. One that will sit exactly flush with the table. The OEM 
insert was some sort of fiberous polycarb, but sat too low, allowing a small 
block of alu to tip forward into the blade, locking the blade and wrecking a 3 
tpi woodslicer blade and smashing the plastic insert.  The next one will sit 
flush but its a bastard measurement, about .198 or .199 thick and I might have 
to fit setscrews to level it.  
But now I have some 7075-T6 to make it from.

Even for wood, that OEM insert is dangerous because it sits 30 %#&@$! thou 
below the table.

> Dave Caroline

Thanks Dave.

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 
--
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users