Author Topic: Design a New Precision LCR Tweezers with Much Lower Cost 【Shannon Tweezers ST42】  (Read 167210 times)

0 Members and 2 Guests are viewing this topic.

Offline ShannonTopic starter

  • Frequent Contributor
  • **
  • Posts: 250
  • Country: hk
Hi, I found a display/convenience bug when using left-handed display mode;

The tweezer "measuring diode" icon is in the wrong direction in left-handed mode. And display the "found" direction in the wrong direction.

Thanks for your feedback.
We tested as you mentioned left hand display mode diode detection direction, and we got the some result, it's wrong direction in left-hand mode.

So we have fixed the display issue, and release the new firmware version 1.5.8.

In addition to the diode display direction in left-hand mode, the value of the short-circuit calibration has been improved a bit, but don't trust the displayed results too much, they are more of a noise level, not actual accuracy.

And traditional rules, to thank you for your feedback, if you have any accessories you are interested in, welcome to send me a PM ;)
Nature and Nature's laws lay hid in night:
God said, Let Newton be! and all was light.
 
The following users thanked this post: Kean, Martin72, dibro, cte, parawizard

Offline folays

  • Contributor
  • Posts: 18
  • Country: fr
Quote
So we have fixed the display issue, and release the new firmware version 1.5.8.
Thank you, indeed in 1.5.8 in left-handed mode, the Tweezer now displays the good diode direction for the low ~1.18V bi-directional tests.

I am not sure I explained myself clearly :
In the high 3.08V mode (which works only in ONE direction, e.g. to power the blue LED),
the "menu" icon could be interpreted as a suggestion in which direction we MUST orient the Tweezer.

I mean : an user could consider orienting the "icon" (and consequently the Tweezer itself) in the same direction as the soldered blue LED.

It happens that for right-handed mode, the suggestion is already in the correction direction.
In right-handed mode, if you orient the menu "icon" of Tweezer, in the same direction than the silkscreen of the blue LED, the blue led will light on.

But for left-handed mode, the suggestion is "wrong", if you orient the "icon" of the Tweezer (in 3V mode) in the same direction than the silkscreen of the blue LED, it won't work.

This is probably because the menu "icon" will be displayed by the firmware like if it were an alphabetical letter, so the icon will always be displayed arrow-to-the-bottom.

I already have all accessories, thank you very much :)
I need to design and print a 3D item being capable of holding very small SMT caps/resistors, where they would be forcibly held into place with only room for the tip of the Tweezers, because when components are oxidized and I need to tighten the Tweezer's more tightly to measure them, the SMT components tend to escape and reach orbital velocity.
 
The following users thanked this post: Shannon

Offline ShannonTopic starter

  • Frequent Contributor
  • **
  • Posts: 250
  • Country: hk
Quote
So we have fixed the display issue, and release the new firmware version 1.5.8.
But for left-handed mode, the suggestion is "wrong", if you orient the "icon" of the Tweezer (in 3V mode) in the same direction than the silkscreen of the blue LED, it won't work.

I need to design and print a 3D item being capable of holding very small SMT caps/resistors, where they would be forcibly held into place with only room for the tip of the Tweezers, because when components are oxidized and I need to tighten the Tweezer's more tightly to measure them, the SMT components tend to escape and reach orbital velocity.

Version 1.5.9 has been tested and released ;)

How to ensure that small components are not fly off is indeed a headache problem. Although we try to make the tweezers stable enough, it still happens occasionally.

Part of the reason is that the gold-plated layer is relatively smooth, but it cannot obtain both antioxidant and conductive properties at the same time.
Even the surface of stainless steel/silver has an oxide film, which is indeed difficult to achieve.
Nature and Nature's laws lay hid in night:
God said, Let Newton be! and all was light.
 
The following users thanked this post: ceut, dibro, Attenbach

Offline Sch4lki

  • Newbie
  • Posts: 2
  • Country: de
Hello everyone,
where can I get a replacement OLED display for the ST42 (original or identical).
Unfortunately, a small crack has formed on the left side and some pixels are no longer legible.

Thank you in advance
Steffen
 

Offline Martin72

  • Super Contributor
  • ***
  • Posts: 7051
  • Country: de
I recommend asking Shannon directly; his after-sales support is excellent.

Offline ShannonTopic starter

  • Frequent Contributor
  • **
  • Posts: 250
  • Country: hk
Unfortunately, a small crack has formed on the left side and some pixels are no longer legible.

Don't worry, I'll PM you.

You are the first individual user to feedback the screen crack. Maybe this misfortune will bring you some good luck.
Feel free to contact me ;)
« Last Edit: December 21, 2024, 04:43:04 am by Shannon »
Nature and Nature's laws lay hid in night:
God said, Let Newton be! and all was light.
 
The following users thanked this post: Kean, KungFuJosh

Offline Sch4lki

  • Newbie
  • Posts: 2
  • Country: de
Shannon helped me in an uncomplicated way by sending me spare parts :) The dispatch took a little longer, but it was completely free of charge.
So the service is really great!

Thank you Shannon

Steffen
 
The following users thanked this post: Kean, KungFuJosh, Shannon


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf