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Hey folks , I know some of ya have put Tach's on their 9" lathes . Where
did ya put the pickup ?? I'm doin a project/experiment & I will be
needin to put a Tach pickup on my 9A spindle . Rite now I'm leaning?
towards a magnetic pickup cause of the size of the sending unit & magnet .
thanks
animal
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This is for a heavy 10L, but maybe it will give you some ideas. I used 1/8" dia rare earth magnets (four), mounted in 3/8" dia aluminum pucks epoxied to the gear. They are sized so that the magnets would pass very close to the Hall-effect sensor. The sensor was mounted on an aluminum tee bracket affixed to a spot I flattened off and added a tapped hole. This sensor was part of the accessories offered with the old MachTach kit which unfortunately is no longer made. -Gary 
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I started with a bicycle speedometer.? This is a 9”? Magnet super glued to spindle take up nut.?
The sensor was stuck on the headstock near it.?
Requires some calculation to convert mph to rpm
I used it once and the I got a strobe app for my phone. That only requires a piece of white tape and reads direct.?
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On Dec 20, 2023, at 6:22?PM, Gary Johnson via groups.io <gwj@...> wrote:
?This is for a heavy 10L, but maybe it will give you some ideas. I used 1/8" dia rare earth magnets (four), mounted in 3/8" dia aluminum pucks epoxied to the gear. They are sized so that the magnets would pass very close to the Hall-effect sensor. The sensor was mounted on an aluminum tee bracket affixed to a spot I flattened off and added a tapped hole. This sensor was part of the accessories offered with the old MachTach kit which unfortunately is no longer made. -Gary <Heavy 10L tach sensor mount.jpeg>
--
Jim B
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The ones I have seen have the sensor on the backend of the spindle
Get
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Hey folks , I know some of ya have put Tach's on their 9" lathes . Where
did ya put the pickup ?? I'm doin a project/experiment & I will be
needin to put a Tach pickup on my 9A spindle . Rite now I'm leaning?
towards a magnetic pickup cause of the size of the sending unit & magnet .
thanks
animal
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Thanks GAry . I have a huge dent in my forehead after lookin at
yer pic . I kept thinklin what am I gonna do with the back gear
plunger . No longer a issue .
animal
On 12/20/23 3:22 PM, Gary Johnson via
groups.io wrote:
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This is for a heavy 10L, but maybe it will give you some ideas. I
used 1/8" dia rare earth magnets (four), mounted in 3/8" dia
aluminum pucks epoxied to the gear. They are sized so that the
magnets would pass very close to the Hall-effect sensor. The
sensor was mounted on an aluminum tee bracket affixed to a spot I
flattened off and added a tapped hole. This sensor was part of the
accessories offered with the old MachTach kit which unfortunately
is no longer made.
-Gary
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I was thinkin bout the left end of the spindle also , but then
would I have to move the magnet if I wanted to put a spyder on ?
Don't know . As usual I have been over thinkin this for a while .?
I just finally got my lathe moved over to the new place on
Saturday .I have crashed cars,trucks,motorcycles , rolled a water
truck & I don't think I have ever had the pucker factor as
high as when I turned down my dirt road with the lathe on a
trailer? . Amazingly all the loose hardware I left on the bench is
right where I left it . Now I have to get one of my roll-aways
moved with all my machine tools . We finally got moisture on the
ground , so I gots mud everywhere .
thanks
animal
On 12/20/23 4:27 PM, Andrei wrote:
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The ones I have seen have the sensor on the
backend of the spindle
Get
Hey folks , I know some of ya have
put Tach's on their 9" lathes . Where
did ya put the pickup ?? I'm doin a project/experiment
& I will be
needin to put a Tach pickup on my 9A spindle . Rite now
I'm leaning?
towards a magnetic pickup cause of the size of the sending
unit & magnet .
thanks
animal
|
https://www.practicalmachinist.com/forum/threads/digital-tachometer-install-on-13-south-bend-lathe.342824/
Get
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I was thinkin bout the left end of the spindle also , but then would I have to move the magnet if I wanted to put a spyder on ? Don't know . As usual I have been over thinkin this for a while .?
I just finally got my lathe moved over to the new place on Saturday .I have crashed cars,trucks,motorcycles , rolled a water truck & I don't think I have ever had the pucker factor as high as when I turned down my dirt road with the lathe on a trailer? .
Amazingly all the loose hardware I left on the bench is right where I left it . Now I have to get one of my roll-aways moved with all my machine tools . We finally got moisture on the ground , so I gots mud everywhere .
thanks
animal
On 12/20/23 4:27 PM, Andrei wrote:
The ones I have seen have the sensor on the backend of the spindle
Get
Hey folks , I know some of ya have put Tach's on their 9" lathes . Where
did ya put the pickup ?? I'm doin a project/experiment & I will be
needin to put a Tach pickup on my 9A spindle . Rite now I'm leaning?
towards a magnetic pickup cause of the size of the sending unit & magnet .
thanks
animal
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The 9Inch and 10K are much smaller than the examples shown. In the morniing I will take/send some photos of mine on my 10K. Works great! Ray
On Wednesday, December 20, 2023 at 04:55:31 PM PST, Andrei <calciu1@...> wrote:
https://www.practicalmachinist.com/forum/threads/digital-tachometer-install-on-13-south-bend-lathe.342824/
Get
I was thinkin bout the left end of the spindle also , but then would I have to move the magnet if I wanted to put a spyder on ? Don't know . As usual I have been over thinkin this for a while .?
I just finally got my lathe moved over to the new place on Saturday .I have crashed cars,trucks,motorcycles , rolled a water truck & I don't think I have ever had the pucker factor as high as when I turned down my dirt road with the lathe on a trailer? .
Amazingly all the loose hardware I left on the bench is right where I left it . Now I have to get one of my roll-aways moved with all my machine tools . We finally got moisture on the ground , so I gots mud everywhere .
thanks
animal
On 12/20/23 4:27 PM, Andrei wrote:
The ones I have seen have the sensor on the backend of the spindle
Get
Hey folks , I know some of ya have put Tach's on their 9" lathes . Where
did ya put the pickup ?? I'm doin a project/experiment & I will be
needin to put a Tach pickup on my 9A spindle . Rite now I'm leaning?
towards a magnetic pickup cause of the size of the sending unit & magnet .
thanks
animal
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For my 1942 single lever Heavy 10L I didn’t want to muck up the gear cover so I pressed a rare earth magnet into the opposite end of the bearing clamp hole and then put a small TO-92 size hall sensor in a plastic tube shoved into a bracket.? One pulse per revolution is fine for my Electronic Lead Screw which shows spindle RPM or if the tool tip is calibrated from the centerline it’s possible to read SFM. 
?
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From: [email protected] [mailto:[email protected]] On Behalf Of Gary Johnson via groups.io
Sent: December 20, 2023 3:22 PM
To: [email protected]
Subject: Re: [SouthBendLathe] Tach pickup Location? This is for a heavy 10L, but maybe it will give you some ideas. I used 1/8" dia rare earth magnets (four), mounted in 3/8" dia aluminum pucks epoxied to the gear. They are sized so that the magnets would pass very close to the Hall-effect sensor. The sensor was mounted on an aluminum tee bracket affixed to a spot I flattened off and added a tapped hole. This sensor was part of the accessories offered with the old MachTach kit which unfortunately is no longer made.
-Gary
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Jim, great to know there's an app. Whats it called? At work I have a hand held tach. that comes with a roll of reflective tape. We check the bench lathes occasionally to be sure they don't exceed marked wheel rpm.
Thank again,
Payson.
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On 12/20/2023 6:00 PM, mike allen wrote: Hey folks , I know some of ya have put Tach's on their 9" lathes . Where
did ya put the pickup ?? I'm doin a project/experiment & I will be
needin to put a Tach pickup on my 9A spindle . Rite now I'm leaning
towards a magnetic pickup cause of the size of the sending unit & magnet .
thanks
animal
|
toggle quoted message
Show quoted text
For my 1942 single lever Heavy 10L I didn’t want to muck up the gear cover so I pressed a rare earth magnet into the opposite end of the bearing clamp hole
and then put a small TO-92 size hall sensor in a plastic tube shoved into a bracket.? One pulse per revolution is fine for my Electronic Lead Screw which shows spindle RPM or if the tool tip is calibrated from the centerline it’s possible to read SFM.
?
?
This is for a heavy 10L, but maybe it will give you some ideas. I used 1/8" dia rare earth magnets (four), mounted in 3/8" dia aluminum pucks epoxied to the gear. They are sized so that the magnets would pass very close to the Hall-effect
sensor. The sensor was mounted on an aluminum tee bracket affixed to a spot I flattened off and added a tapped hole. This sensor was part of the accessories offered with the old MachTach kit which unfortunately is no longer made.
-Gary
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Thanks Mike , do ya remember what sensor you used ? Rite now I only have the ones that are used on the treadmills , I would like to get one like the one ya used , I think their probably better quality & look easier to adjust .
thanks
animal
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I cannot vouch for the quality as it came from Amazon although it
has worked for a couple of years. Several sellers have what appears
to be the same unit. Here is a link, but it may not be the best
deal:
On 12/22/2023 9:17 PM, mike allen
wrote:
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Thanks Mike , do ya remember what sensor you used ? Rite now I
only have the ones that are used on the treadmills , I would like
to get one like the one ya used , I think their probably better
quality & look easier to adjust .
thanks
animal
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I used magnetic with a magnetic mounting bracket. 1922 SB 15x8. It sat idle for 40 years in dad's shop.
Sorry for the mess, haven't cleaned up after the last project.
Rick Swineford
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-----Original Message----- From: [email protected] < [email protected]> On Behalf Of mike allen Sent: Wednesday, December 20, 2023 6:01 PM To: [email protected]Subject: [SouthBendLathe] Tach pickup Location Hey folks , I know some of ya have put Tach's on their 9" lathes . Where did ya put the pickup ? I'm doin a project/experiment & I will be needin to put a Tach pickup on my 9A spindle . Rite now I'm leaning towards a magnetic pickup cause of the size of the sending unit & magnet . thanks animal
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Nice!
John
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-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of Rick Swineford
Sent: January 5, 2024 9:49 PM
To: [email protected]
Subject: Re: [SouthBendLathe] Tach pickup Location
I used magnetic with a magnetic mounting bracket. 1922 SB 15x8. It sat idle
for 40 years in dad's shop.
Sorry for the mess, haven't cleaned up after the last project.
Rick Swineford
-----Original Message-----
From: [email protected] <[email protected]> On Behalf
Of mike allen
Sent: Wednesday, December 20, 2023 6:01 PM
To: [email protected]
Subject: [SouthBendLathe] Tach pickup Location
Hey folks , I know some of ya have put Tach's on their 9" lathes . Where did
ya put the pickup ? I'm doin a project/experiment & I will be needin to put a
Tach pickup on my 9A spindle . Rite now I'm leaning towards a magnetic
pickup cause of the size of the sending unit & magnet .
thanks
animal
|
Jim_B
Payson
Rick Swineford
