Michael Gilligan | 17/10/2022 16:48:00 |
![]() 23121 forum posts 1360 photos | Posted by Speedy Builder5 on 17/10/2022 15:43:19:
[…] I was hoping that there was an encoder that could be "slipped" onto the slide hand wheel in a simple manner […] . Although it probably wouldn’t slip onto a Boxford, there was … but they weren’t good enough to survive the process of ‘natural selection’ … The WolfCraft ones used Gray Code and mechanical wipers busily wearing-out the PCB tracks, and a tiny grey-on-grey LCD With the increasing miniaturisation of electronics; it’s probably time someone re-thunk the idea and made a Bluetooth-enabled equivalent with decent resolution, which put the display on your ‘phone or whatever. Meanwhile … we can but dream MichaelG. |
YouraT | 17/10/2022 16:50:01 |
83 forum posts 22 photos | >> With the increasing miniaturisation of electronics; it’s probably time someone re-thunk the idea and made a Bluetooth-enabled equivalent with decent resolution, which put the display on your ‘phone or whatever. << oh, so something like this perhaps? https://www.yuriystoys.com/
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Michael Gilligan | 17/10/2022 17:00:36 |
![]() 23121 forum posts 1360 photos | Posted by YouraT on 17/10/2022 16:50:01:
>> With the increasing miniaturisation of electronics; it’s probably time someone re-thunk the idea and made a Bluetooth-enabled equivalent with decent resolution, which put the display on your ‘phone or whatever. << oh, so something like this perhaps? https://www.yuriystoys.com/
. Not quite I know and love what you have done over the years, but unless I have missed it [in which case please forgive me] there is nothing of yours that does the bit that Speedy was looking for … a self-contained rotary device which slips nicely onto a feed-screw and counts parts of a turn. MichaelG. |
YouraT | 17/10/2022 17:10:21 |
83 forum posts 22 photos | Posted by Michael Gilligan on 17/10/2022 17:00:36:.
Not quite I know and love what you have done over the years, but unless I have missed it [in which case please forgive me] there is nothing of yours that does the bit that Speedy was looking for … a self-contained rotary device which slips nicely onto a feed-screw and counts parts of a turn. MichaelG. Not me, although that names are similar It was more a response to the bluetooth connection and on screen display than the leadscrew bit of the OP's request. I do think though that using small format magnetic scales on the slide is a better approach than the rotary encoder option, as you will be measuring actual slide displacement rather than something one link removed from it. |
John Haine | 17/10/2022 17:12:30 |
5563 forum posts 322 photos | The encoders that Joe referenced look nice, but would one need to calibrate them? For example, the LS pitch might be a bit off, or the screw somewhat worn. |
Michael Gilligan | 17/10/2022 17:32:46 |
![]() 23121 forum posts 1360 photos | Posted by YouraT on 17/10/2022 17:10:21:
Not me, although that names are similar
. Oops ! … I thought it was an a.k.a.
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Michael Gilligan | 17/10/2022 17:38:00 |
![]() 23121 forum posts 1360 photos | Posted by John Haine on 17/10/2022 17:12:30:
The encoders that Joe referenced look nice, but would one need to calibrate them? For example, the LS pitch might be a bit off, or the screw somewhat worn. . Ultimately, direct reading of linear movement must be the preferred option, but if Speedy just wants a convenient display of Metric values this seems very expedient, and almost certainly better than the visual resolution of a Boxford dial. MichaelG. |
duncan webster | 17/10/2022 17:50:44 |
5307 forum posts 83 photos | Way back in the mists of time (2013?) I described in ME how I'd mounted an encoder onto the leadscrew of a Cowells lathe. Readout by Arduino. It had a 90 slot wheel which gives better than half a thou resolution with a 0.1" pitch screw. You'd need to find a way of mounting the optoswitches onto the handwheel bracket. By this time, I'd be seriously looking at just buying the gubbins and using a magnetic tape. You'll want DRO on the saddle soon enough having got used to it on the cross slide. If you want a copy of the article send me a pm |
Mike Poole | 17/10/2022 19:13:22 |
![]() 3676 forum posts 82 photos | Chronos list these displays for the C3 type lathes. You may be stuck with the feedscrew pitch of the C3 lathe though.**LINK** Mike |
Speedy Builder5 | 17/10/2022 19:31:53 |
2878 forum posts 248 photos | I guess I was looking for something like this with a hole through the middle? |
Michael Gilligan | 17/10/2022 19:49:10 |
![]() 23121 forum posts 1360 photos | Posted by Speedy Builder5 on 17/10/2022 19:31:53:
I guess I was looking for something like this with a hole through the middle? . That was certainly my assumption … and what Mike links MichaelG. Edited By Michael Gilligan on 17/10/2022 19:50:40 |
JasonB | 17/10/2022 19:54:20 |
![]() 25215 forum posts 3105 photos 1 articles | They do have a hole through the middle see here However as I said in my first post I think they come set up for metric screws so one turn will read 2.00mm or 0.079" on the display |
AJAX | 17/10/2022 20:11:07 |
433 forum posts 42 photos | Why not just fix a dial indicator to the cross slide to show movement across the bed? Cheap, no battery, easy to read and zero. |
Speedy Builder5 | 18/10/2022 06:48:07 |
2878 forum posts 248 photos | Fair point Ajax! The CHRONOS readout is the sort of thing I was looking for, like Jason said, if I could change the pitch of the feed screw on the device. Bob |
Michael Gilligan | 18/10/2022 07:43:50 |
![]() 23121 forum posts 1360 photos | Posted by Speedy Builder5 on 18/10/2022 06:48:07:
[…] like Jason said, if I could change the pitch of the feed screw on the device. . That’s why I said this style of read-out had disappeared by ‘natural selection’ [Darwinism] I have never looked inside the SIEG device, but I suspect it is very similar to the WolfCraft one. That simply didn’t have enough ‘native resolution’ to cope as a data-source for Imperial/Metric conversion. Sorry, I no longer have the device, so I can’t take photos … but it was mechanically quite crude. MichaelG. . Edit: __ See here for the use of Gray Code on shafts: https://en.wikipedia.org/wiki/Gray_code#Position_encoders If I recall correctly the WolfCraft device only used four tracks [as per the monochrome illustration on that page] Edited By Michael Gilligan on 18/10/2022 07:54:48 |
Michael Gilligan | 18/10/2022 08:07:59 |
![]() 23121 forum posts 1360 photos | This [being a more sophisticated SIEG unit] is interesting: **LINK** http://www.mini-lathe.com/mini_lathe/reviews/Sieg_DRO/dro2.htm MichaelG. Edited By Michael Gilligan on 18/10/2022 08:10:25 |
JasonB | 18/10/2022 08:39:40 |
![]() 25215 forum posts 3105 photos 1 articles | Thanks for the last link Michael, I knew they were thread specific but thought it was the metric thread. What's really needed is something like a bike computer where you set distance according to tyre diameter but in this case it would be thread pitch. Switching between radius and diameter reading would be an added bonus. |
Michael Gilligan | 18/10/2022 09:23:47 |
![]() 23121 forum posts 1360 photos | Just spotted this offering by ARC : **LINK** https://www.arceurotrade.co.uk/Catalogue/Machine-Spares/SC3-Mini-Lathe-Spares/SIEG-Mini-Lathe-DRCD-to-Manual-Conversion-Kit It would be interesting to know what has driven this MichaelG.
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JasonB | 18/10/2022 10:05:05 |
![]() 25215 forum posts 3105 photos 1 articles | That will be the same one I linked to about this time yesterday |
Michael Gilligan | 18/10/2022 10:22:56 |
![]() 23121 forum posts 1360 photos | Posted by JasonB on 18/10/2022 10:05:05:
That will be the same one I linked to about this time yesterday . Apologies, Jason … I don’t recollect following your link [because I wrongly assumed it would be for a ‘digital upgrade’ not for an upgrade from digital to mechanical] MichaelG. . P.S. __ I now also note that the SIEG digital unit, that it is shown as replacing, is already the more sophisticated version [!] Edited By Michael Gilligan on 18/10/2022 10:32:26 |
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