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Digital Vernier on sale at Maplins - £10
councilface:
--- Quote from: Fozzy The Bear on January 24, 2008, 08:20:37 pm ---Woolworths, (in the UK) currently have exactly the same item on sale for £7.00 At least my local one does and they are up to Mitutoyo standards. In fact the £7.00 one is slightly better than my actual Mitutoyo one that I've had for the last 12 years.
Best Regards,
Julian (Fozzy The Bear)
--- End quote ---
Sorry Fozzy, I work as a quality engineer. No way will a seven quid vern come close to a Mitutoyo. Mitutoyo are the benchmark.
Sorry for this post, Ive managed to bore myself :(
Fozzy The Bear:
--- Quote from: councilface on January 25, 2008, 03:04:24 pm ---
Sorry Fozzy, I work as a quality engineer. No way will a seven quid vern come close to a Mitutoyo. Mitutoyo are the benchmark.
--- End quote ---
You're right....The seven quid vernier doesn't come anywhere close to the Mitotoyo one... Over the six inch scale the seven pound one is actually more accurate by 0.0005 of an inch. 1/2 a thousandth of an inch more accurate!!! I've had them both set over gauge blocks today to confirm this.
Best Regards,
Julian (Fozzy The Bear)
ratzz:
--- Quote from: Fozzy The Bear on January 25, 2008, 03:21:29 pm ---
--- Quote from: councilface on January 25, 2008, 03:04:24 pm ---
Sorry Fozzy, I work as a quality engineer. No way will a seven quid vern come close to a Mitutoyo. Mitutoyo are the benchmark.
--- End quote ---
You're right....The seven quid vernier doesn't come anywhere close to the Mitotoyo one... Over the six inch scale the seven pound one is actually more accurate by 0.0005 of an inch. 1/2 a thousandth of an inch more accurate!!! I've had them both set over gauge blocks today to confirm this.
Best Regards,
Julian (Fozzy The Bear)
--- End quote ---
Sorry, just to confirm Fozzy - the seven quid one is MORE accurate that the Mitotoyo?
If so, I'm off to Woolies!
Ratzz
Franco B:
--- Quote from: ratzz on January 25, 2008, 03:51:24 pm ---
--- Quote from: Fozzy The Bear on January 25, 2008, 03:21:29 pm ---
--- Quote from: councilface on January 25, 2008, 03:04:24 pm ---
Sorry Fozzy, I work as a quality engineer. No way will a seven quid vern come close to a Mitutoyo. Mitutoyo are the benchmark.
--- End quote ---
You're right....The seven quid vernier doesn't come anywhere close to the Mitotoyo one... Over the six inch scale the seven pound one is actually more accurate by 0.0005 of an inch. 1/2 a thousandth of an inch more accurate!!! I've had them both set over gauge blocks today to confirm this.
Best Regards,
Julian (Fozzy The Bear)
--- End quote ---
Sorry, just to confirm Fozzy - the seven quid one is MORE accurate that the Mitotoyo?
If so, I'm off to Woolies!
Ratzz
--- End quote ---
I wouldn't be suprised. The seven quid one is much newer than the 12 year old Mito so it will probably be more accurate if the Mito has not been regularly been calibrated.
At the end of the day we are splitting hairs. The cheap one will be fine for everyday use. Hell, digital verniers are not that accurate anyway, you can easily change the reading depending on the pressure you put on the vernier.
Fozzy The Bear:
--- Quote from: ratzz on January 25, 2008, 03:51:24 pm ---Sorry, just to confirm Fozzy - the seven quid one is MORE accurate that the Mitotoyo?
If so, I'm off to Woolies!
Ratzz
--- End quote ---
Yup!! more accurate by half a thou over 6 inches.
Calibration doesn't come into it with digital calipers like these. They work by measuring a reference grid built into the the surface of the slide. So theoretically they should never go out of calibration (you set the 0 reference point every time you turn them on). That said they all suffer to a greater or lesser degree in terms of thermal expansion which alters the length of them by a minute amount. On the gauge block test today the £7 one was out performing the Mitutoyo.
As Franco said, you can change the reading based on the amount of pressure you apply. It's down to learning the correct technique of using them, when you need to be accurate to + - 0.0005" which is more than enough for most engineering and way more than enough for arcade building.
Best Regards,
Julian (Fozzy The Bear)