For such a lightweight plastic measuring device, the resolution of 0.1mm or 0.01" and repeatability is quite astonishing. Whilst not being suited to a professional machinist, these units are ideal for ordinary measurements, including designing 3D printed components.
It should be noted that the quiescent current of these devices is around 18uA, even when off (the display goes off until movement is detected).
Some users are reporting a very short battery life, but a typical 100mAh (0.1Ah) button cell should be able to supply 0.00002A for a very long time. (Theoretically 100's of days.)
The linear capacitive encoder in these units is very impressive. The physical encoder is seemingly very simple, with the bulk of the work being done by the ASIC (Application Specific Integrated Circuit). It's very similar in its cost optimisation to the cheap, but super-accurate weighing scales.
I'm really impressed by the accuracy of these units for their price. They are very common on eBay for as little as £5 (about $7 USD).
Here's a generic search link for the USA:-
https://www.ebay.com/sch/i.html?_from=R40&_nkw=carbon+fiber+caliper&_sacat=0&_sop=15
Or for those in the UK:-
https://www.ebay.co.uk/sch/i.html?_from=R40&_nkw=carbon+fiber+caliper&_sacat=0&_sop=15
The standard search term is carbon fiber caliper.
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
http://www.bigclive.com/coffee.htm
This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty.
It should be noted that the quiescent current of these devices is around 18uA, even when off (the display goes off until movement is detected).
Some users are reporting a very short battery life, but a typical 100mAh (0.1Ah) button cell should be able to supply 0.00002A for a very long time. (Theoretically 100's of days.)
The linear capacitive encoder in these units is very impressive. The physical encoder is seemingly very simple, with the bulk of the work being done by the ASIC (Application Specific Integrated Circuit). It's very similar in its cost optimisation to the cheap, but super-accurate weighing scales.
I'm really impressed by the accuracy of these units for their price. They are very common on eBay for as little as £5 (about $7 USD).
Here's a generic search link for the USA:-
https://www.ebay.com/sch/i.html?_from=R40&_nkw=carbon+fiber+caliper&_sacat=0&_sop=15
Or for those in the UK:-
https://www.ebay.co.uk/sch/i.html?_from=R40&_nkw=carbon+fiber+caliper&_sacat=0&_sop=15
The standard search term is carbon fiber caliper.
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
http://www.bigclive.com/coffee.htm
This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty.
Yeah even if you needed more resolution I'm a pinch you could look at the printed tape measure, and just sorta guesstimate based on where it was in relation between the 100,000/inch markings, like halfway 150 or 125 or 175, 1 1/4 , 3 1/4 , eyeball even if the digital isn't saying so.
got one of these that measures in the hundredths of millimeters
I don't see why glass fiber reinforced plastic would be any less accurate. it's fairly dimensionally stable. I don't know how that affects temperature is though
Thank you
I wonder if the inch and metric use different pickups and not just convert them electronically.
Why don't you measure a feeler guage with this caliper
Что касаемо штангенциркуля:
Китайская разработка бюджетного класса, на борту имеет микропроцессор 8 битный, протокол является тоже 8 битный по 4 бита на секцию измерения смещения угла опережения что в совокупности является емкостным датчиком для измерения, само измерение не точное так как находится в инкреметном соотношение и измерение происходит всегда с пересчетом на то место откуда оно производится. В отличии от качественных где замер происходит в абсолютном диапазоне что практически сводит к нулю погрешность измерения и в таких измерение производится с точностью до микрона пример для такого класса Mitutoy с протоколом Digimatic, на китайской линейке имеется до 5 клавиш (нуль, вк выкл, мм in, и в некоторых есть запоминание значения) в линейка первого класса есть все тоже и переключение с инкрементного на абсолютное, разница показаний и кнопка ввода по протоколу. Поэтому там где на китайских платах имеется кнопка но не подключена это просто реплика с оригинала без возможности полного дубликата!
Итог, как игрушка такие штангели пойдут для измерения в домашних условиях, но на производство лучше использовать качественные и Mitutoy себя зарекомендовал!
Thanks! I actually have one of these for 3D printing. I have a nicer set from Mitotoyo but those are not needed in the house, so I have this cheap set on my desk just to have a reference when designing something. I had pulled them apart on accident and was wondering how to put it back together, found your video and it was helpful!! Fixed the calipers and now can use them again. I need to print a new battery cover though.
Brilliant – saved me taking one apart to see what was inside
I have a Workzone Digital Caliper, which is at least 10 years old. Cost about £15.
I've just checked it against 2 Micrometer standards (1" and 2"), and it's dead nuts. 😎
somehow the word "interferometry" comes to mind
As a mechanical inspector on a UK military aircraft project, who uses Vernier callipers on a regular basis (not ones supplied by Lidl may I quickly add). This strip down has been so interesting and enlightening about an item of measuring equipment I've taken for granted for so long and often wondered how they actually do work. Thank you so much.
Let's take it to bits!
mine does absolutely crazy things, like display stuff while turned off, when I try to measure something, it shows nonsense, if it is actually giving a good read, is barely visible as it draws what he pleases, any way to fix that?
It is possible to confuse the caliper but you have to be really fast. Like drop caliper to floor from 1m and use gravity and mass to do the move. In that case I observe offset errors in multiplies of about 5.1mm, like that distance is "absolute" position and this pattern is repeated for the full length…
another completely pointless video for ad revenue