uuu
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Post by uuu on Nov 15, 2013 8:25:19 GMT
Sorry to interrupt your love-in, but can we get back to the punch-up?
Clearly any engineer who uses a digital-display caliper is going to produce an inferior result to a vernier one.
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bhk
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Post by bhk on Nov 15, 2013 9:19:05 GMT
Sorry to interrupt your love-in, but can we get back to the punch-up? Clearly any engineer who uses a digital-display caliper is going to produce an inferior result to a vernier one. Lol, strangely enough one of my pet hates is digital micrometers!! |
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Post by Deleted on Nov 15, 2013 10:44:28 GMT
------- I don't mind the digital display so much as the dammed flat batteries!!.. much rather have a solar powered one !!........ Cleaner on the old environment as well !! PS..Wot's a "LOVE-IN" then ??...clearly before my/our time ??LoL!!-------------- If you do visit Stratford UA station, go to the far end of that car park where there are a couple of Mk1 carriages in a head-shunt siding..A young chap is building a display / museum of the stations history there....He bought a surplus loco chassis via E-Bay from me a few years back...it might still be there ?? ( Delivered by Joyce and myself on our 1976 Honda GL1000 Goldwing )--------- gorgeous, sunny-day ride from Telford into and over--the Malvern Hills with ELGAR in our ears and MORGAN sports cars whizzing by !! Attachments:
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Post by suctionhose on Nov 15, 2013 11:17:31 GMT
Sorry to interrupt your love-in, but can we get back to the punch-up? Clearly any engineer who uses a digital-display caliper is going to produce an inferior result to a vernier one. Was going to bring this one up sooner or later! Gave my quality Japanese Digital Verniers to a lad at the club - don't want them! Wouldn't pick a digital mic up if I saw a new one on the ground... Bit lazy now but used to pride myself doing metric-imperial conversions to 3 dec places in my head as I worked. Yes I hand rivet everthing - no squeezers, no air chisels, no spinners. Drill with hand held drill so I can move the hole to the line. Some technological concessions but do you know what? - making stuff the hard way is a lot quicker than you think! Ross |
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Post by Deleted on Nov 15, 2013 12:57:51 GMT
Gave my quality Japanese Digital Verniers to a lad at the club Sorry to nit-pick, but you can have a digital calliper, or a Vernier calliper, but not a digital Vernier! |
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Post by Roger on Nov 15, 2013 18:20:42 GMT
Love it.... personally, I gave away my imperial and metric micrometers in favour of Mitutoyo ones. I can't be doing with the bother of squinting round the barrel of an old fashioned one when the display does it for me. And if I want to compare one size with another, I just hit zero and there's the difference.
As for digital calipers and batteries. Don't waste your money of cheap calipers, buy mitutoyo ones, the batteries last for years.
I've fitted a DRO to the lathe, 1 micron plunger dials on the grinder and a digital scale on the quill of the mill. I've even fitted a modified digital caliper to the tailstock on the lathe. (see my album)
Am I a Digi-holic?
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Post by Roger on Nov 15, 2013 18:23:03 GMT
Oh, and I forgot, I also fitted a 10 micron scale on a curved segment on the grinder so I can set an exquisitely accurate angle.
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Post by ettingtonliam on Nov 15, 2013 18:57:30 GMT
------- I don't mind the digital display so much as the dammed flat batteries!!.. much rather have a solar powered one !!........ Cleaner on the old environment as well !! PS..Wot's a "LOVE-IN" then ??...clearly before my/our time ??LoL!!-------------- If you do visit Stratford UA station, go to the far end of that car park where there are a couple of Mk1 carriages in a head-shunt siding..A young chap is building a display / museum of the stations history there....He bought a surplus loco chassis via E-Bay from me a few years back...it might still be there ?? ( Delivered by Joyce and myself on our 1976 Honda GL1000 Goldwing )--------- gorgeous, sunny-day ride from Telford into and over--the Malvern Hills with ELGAR in our ears and MORGAN sports cars whizzing by !! I agree, Stratford is a lovely example of a GWR station, used to go from there on school trips in the 1950s!. I was there a couple of weeks ago, and was particularly impressed that a new flight of steps from the footbridge had been done in the same style as the original bridge. I didn't notice any Mk1 carriages though, possibly I wasn't looking in the right place, but the car park has been altered a lot for the new development on the old cattle market site, so maybe they've gone. I've got to go near there again next week for a hospital appointment, so I'll look carefully for the coaches. Oh, in case I'm accused of going off topic, I would still use my Starret vernier, only the eyes are not good enough these days. For general work I use digital callipers, quick, easy, covers a range of work up to 8" (alright 200mm) for OD, ID and depth, metric or imperial at the press of a button,all from one tool. If its precise work, then I break out the micrometers (Moore and Wright, what else?), but it needs a whole drawerfull to cover the same range as the one digital calliper. I still use a vernier for gear measurement, if there is a digital one of these, I couldn't justify buying it for the occasional use I have for it. I was brought up on imperial measurement at school, went into the construction industry just as that was going metric, so I'm bilingual really. I do most of my work in imperial, because the machines are imperial, and most of the drills are imperial, including the dreaded letter and number series, and I think in thous from habit really. I do have metric taps/dies etc, and both lathes can cut metric threads if they have to. Once I get outside the workshop, to do a construction type job, then I revert to thinking in cm. Richard |
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Post by suctionhose on Nov 15, 2013 20:28:56 GMT
Sorry to nit-pick, but you can have a digital calliper, or a Vernier calliper, but not a digital Vernier! Fair point! For a moment I thought "nit" was spelt with a "k" but no, you are right again! |
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Post by Deleted on Nov 15, 2013 20:35:16 GMT
so what's this called then ??>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Attachments:
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Post by Deleted on Nov 15, 2013 20:39:54 GMT
[quote . I was there a couple of weeks ago, and was particularly impressed that a new flight of steps from the footbridge had been done in the same style as the original bridge. I didn't notice any Mk1 carriages though, possibly I wasn't looking in the right place, but the car park has been altered a lot for the new development on the old cattle market site, so maybe they've gone. I've got to go near there again next week for a hospital appointment, so I'll look carefully for the coaches.
[/quote]-------------- They were at the far end of the photo I posted, and yes--it might well have been the old cattle market site....They were surrounded by fencing because the owner was now living in them..........Please do let me know what's become of them ??...........Thanks..
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pault
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Post by pault on Nov 15, 2013 21:33:15 GMT
That’s a digital calliper Hagley, no vernier scale on it
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Post by Deleted on Nov 15, 2013 21:37:47 GMT
That's not what the advertisement says..........isn't that the vernier scale on the top run ??------------- found this which is helpful>>>>>>>>>>>>> www.technologystudent.com/equip1/vernier1.htm ------------- I do understand what the difference is--- I'm sure I've seen a Vernier Calliper with a dro as well.......oh well, maybe not then...ho-hum (twiddles fingers---looks vacantly into space)........ |
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bhk
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Post by bhk on Nov 15, 2013 21:51:32 GMT
I think digital callipers are worth there weight in gold, but as others have said you got to spend more than £10 on a set for repeatable accuracy, I use them on tolerances up to +/- 4 thou, beyond that its micrometers, a good brand I would highly recommend for any measuring equipment and is made in the UK is Oxford precision
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Post by suctionhose on Nov 15, 2013 22:21:07 GMT
This loco was built in 3 years using hand methods.  The tender rivetting is marked out with scriber , popped and drilled with hand or pedestal drill  Backhead  These axlebox covers would be entry level CNC routing. I did them manually with DRO. Love the concentration needed. Separates the men from the boys!  You see the finished cover on the axle box here  Now off to the club to give her gallop! Ross |
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Post by andyhigham on Nov 15, 2013 22:28:59 GMT
Anothr advantage of the digital caliper is the ability to zero it at any point. eg to measure the difference between two depths
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Post by andyhigham on Nov 15, 2013 22:31:21 GMT
Ross, the axlebox covers are what Julia on TT would call "manual CNC"
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Post by Deleted on Nov 15, 2013 23:51:41 GMT
I'm sure I've seen a Vernier Calliper with a dro as well.......oh well, maybe not then...ho-hum (twiddles fingers---looks vacantly into space)........ Just keep taking the tablets. |
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uuu
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Post by uuu on Nov 16, 2013 9:03:24 GMT
Sorry to nit-pick, but you can have a digital calliper, or a Vernier calliper, but not a digital Vernier! While we're nit-picking, is it calliper, or caliper? |
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Post by ejparrott on Nov 16, 2013 9:10:13 GMT
But this still refers to the idea that CNC work is unskilled, There are three levels to CNC in 'perfect' industry. Programmers, Setters and Operators. Because I work for a small company, I am all three. In the world that is CNC, the skilled man is the programmer, its his job to work out the program, decide what tools are required and how the job is to be held. Below him, is a cheaper less skilled man who is the Setter. He takes the program, feeds it in to the machine, sets all the tools as per the programmers instructions, proves the first part and makes any tweaks that are needed to the program. Bottom of the pile, cheapest and frequently unskilled is the operator. All he does is put metal in, press the go button, and take metal out. Sometimes he'll have had enough training to be able to alter tool wear offsets to compensate on his own, sometimes the setter or even the Inspector will be keeping a watchful eye and they'll do it. This unskilled operator often hasn't ever run a manual machine, doesn't understand cutting actions of tools, and has no idea why his machine is running at the speeds and feeds it is. So yes, certain aspects of CNC are unskilled. Truth be told, I've not yet come across this perfect CNC environment, even at our place we've only got 2 levels, and that only on the milling section, where half of the guys are all three, the other half are only Setter/Operators. And with all that said, this has got nothing to do with the OP's original question about sorting out Speedy, so can we please get back on topic!!!!!!!!!!!!!!!!!! |
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