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- เผยแพร่เมื่อ 5 ส.ค. 2020
- Digital Caliper try to Hacking the Capacitive Linear Encoder from 150mm to 650mm
www.pcbway.com
www.pcbway.com/project/sharep...
Capacitive Linear Encoder Dimensions
3D Case for Caliper + aluminium Profile:
www.dropbox.com/s/x3trnggmmqd...
ibb.co/wWk44FW - วิทยาศาสตร์และเทคโนโลยี
Brilliant ,thank you for sharing
Я тоже дошел до этой идеи, но раньше на полгода. Добавлю что не обязательно точно соблюдать размеры площадок на линейке, программа в считывающей головке сама умеет подстраиваться под размер площадок, я даже делал, для эксперимента, линейку у которой площадки в два раза шире (хотел линейку на поперечную подачу токарного станка приделать, что бы показывала размер на диаметр), но показания не изменились и считалась длина так-же как и с обычной ширины площадками. Для работы нужны только "Т"-площадки. Линейку сверху защитил каптоновой лентой.
I also came to this idea, but earlier for six months. I will add that it is not necessary to accurately observe the dimensions of the pads on the ruler, the program in the reading head itself is able to adjust to the size of the pads, I even made, for the experiment, the ruler whose pads are twice as wide (I wanted to attach a ruler to the transverse feed of the lathe to show size per diameter), but the readings did not change and the length was considered in the same way as with the usual width of the pads. Only "T" -sites are needed for work. He protected the ruler from above with Kapton tape.
th-cam.com/video/2a7WchFDN-4/w-d-xo.html
th-cam.com/video/GdBFpgGX3FU/w-d-xo.html
i had tried a year ago to decrypt the code after 3 attempts I got the right results +0.01 -0.01 if the board gaps do not fit the tolerance is 3mm or more Only a high quality pcb manufacturer can produce the printed circuit boards
@@jimi1233 The board itself, the one in the caliper, of course must be made very accurately. Accuracy depends on it.
But the requirements for the accuracy of the ruler are much lower.
I made a ruler tape on a simple CNC milling machine, I simply engraved with a milling cutter without even taking into account the width between the platforms. And everything works exactly.
In the descriptions for this video there is a .cdr file, there is a drawn ruler that I milled.
th-cam.com/video/ru7R1dLsWgY/w-d-xo.html
Сама плата, та что в штангенциркуле, естественно должна быть выполненна очень точно. От нее и зависит точность.
Но требования к точности линейки гораздо ниже.
Я ленту линейки делал на простом фрезерном станке CNC, просто гравировал фрезой даже не учитывая ширину между площадками. И всё работает точно.
В описаниях к этому видео есть файл .cdr, там отрисована линейка которую я фрезеровал.
th-cam.com/video/ru7R1dLsWgY/w-d-xo.html
I have recently made myself a DRO using digital calipers and I have had some of your extensions made - thanks 🙂
Do you have any advice on how to prevent interference from my mill's motor being switched etc. from causing the calipers to jump in their readings?
Nice thing!
I would too like to maximize my calipers but I'm not sure about the dimensions of the grid. Can you post the dimensions? because I only seen three of them, 7.8, 2.3 and 0.3mm. 2.3x2 for the widest part of the T? And how about the height of it.
Thank you very much!
Hello,
I just tried to order this.
I copied the settings from the provided screenshots, but the audit failed.
"Lack of top copper layer"
I'm not sure what to do and appreciate any help.
Thank you!
What is the latency between motion and an updated output
Info on the DRO box with display?
Sir how you made this green part which is stick on aluminum profile
Hii is there any way to make the capacitive reader from scratch which you used of digital Vernier caliper
I tried to extract the files from the pkg extension, but with 7-zip all I get is a number 0 to 5 and 0 to 10 and a thumbnail.png. Is the file extensions missing from the pkg or are they packed and unpacked with another programme other than 7-zip.
Just ordered 30 pcs with pcbway, will make a 2000 mm dro and closed loop control on the lathe/mill combination I made. So I don't care about back-lash anymore.
should be possible 2000 mm but most calipers only count up to 650 mm so needs some specific arduino code
@@jimi1233 Hi, The 0,01 accurate calipers continue the count until 999,99 mm then to 0, so it's easy to code. One question: in your video, between 09:11 and 09:14 you don't show how you 'glue' them together, I think I need to solder and verify the exact distance between 2 pieces? ALmost done here, will share the video. Combined with a rotary encoder, I have accuracy up to 0,0001 mm (0,1 micron)
@@JohanDegraeveAanscharius Hi Johan, I'm working to make it 2000mm too, what did you change to the code? how did you do the distance between 2 pieces?
@@jemi_lin for (int_fast8_t i = 0; i < 20; i++) {
bit_result_temp = (bit_result_temp
Hi,
Which software did you use to measure the pcb track widths. Could you please provide a useful link. Btw, highly informational.
Thanks
Datinf Measure for the measure
Sorry...I also see other dimensions but they are a bit confusing. At 6:12 I see 2.9 for the height of the widest part of the T, but I don't understand the relation between 4.9 and 5.1.
Can you tell me?
Thank you!
Hello the finish PCB and all dimensions is on www.pcbway.com/project/shareproject/Digital_Caliper_HACK_MOD_from_150mm_to_650mm.html you need only to export it as gerber file ..
the most important thing is the distances 0.1 inch =2,54mm Everything else is not so important here the dimensions ibb.co/wWk44FW
Brilliant
Where can I down load the 3D printed files? tx
not sure which caliper is compatible with this design, who knows?
Got my PCBs from jlcprc this week. 14 eur including shipping to the NL for 5 strips. My calliper restarts from zero after 20cm or so. Anyone else have this issue?
you have to see frist what your caliper can measure and how far... some can measure up to 650mm or 25mm or 1000mm and then there's a zero...
Did you mean jlcpcb? Is it still possible to order them from there?
Hi ! is there any way I could get a hand on your PCB
Hi, it is not possible to re-order this pcb. Got reaply from pcb-way - none copper layer present.
www.pcbway.com/project/shareproject/Digital_Caliper_Hack_Mod_new_2021.html
yes the Engineer are confused anytime but i change the design now should be posible to order...
@@jimi1233 They are. Got order by ordering single layer and minus all else. Received - all works. Many thanks !
@@StanislavZachazevski can you share some photos from the new design Thanks
Nice idea, but thumbs down for missing narration and that annoying music. Did you check the exact spacing of the pads on the ordered PCBs? Looks like you measured just a single pad and put that in your file. That will add up the error with every following pad. The long version could be several millimetres off if full extended.
Hi ! is there any way I could get a hand on your PCB file ?
@@jimi1233 Hi, they still have problems with this. The layers don't correspond with their system. Tried 10 times, nogo.
@@jimi1233 There seems to be a problem with the Gerber files. They say that there's no trace in the file and therefore no copper layer.
@@TheThelama53 have you try from this new design ...www.pcbway.com/project/shareproject/Digital_Caliper_Hack_Mod_new_2021.html
@@TheThelama53 they need to zoom in on the gerber file really far. The traces are there.
@@romixlee6643 that's true for me it was audit failed too because they are too blind to zoom in to the gerber haha
Astrein😮
I tried to use a digital caliper in this way, and it did not work. Examining the data output, it was entirely random. Sitting at zero, the output data was different every time. Beware, some of these calipers have fake data ports.
not all calipers have a data output..in 24 bit mode
@@diyjaki8628 This was- going by the clock bits.
I have recently bought a couple of the cheapest plastic calipers I could find on eBay and the data out on these are working ok but I was surprised to discover it reads in 100th mm despite the calipers only displaying 10ths.
potential 10.4m by chaining multiple PCBs