Products > Test Equipment

1000 A current probe for spot welder measurement

<< < (3/5) > >>

tautech:
There is much about battery spot welding in this thread:
https://www.eevblog.com/forum/projects/guesses-on-what-i-am-attempting-here/

John+audio:
Shahriar of The Signal Path does a good tear down of a spot welder - including current measurements:



He also checks - and improves the safety of his unit......

Marco:
Put some kelvin taps on your welding wire and measure the inductance and resistance, then calculate the current from the voltage waveform using some differential math. It's going to be a little off due to temperature, but you don't need high accuracy.

Martinn:
I have seen this video. However I don't see how I could nondestructively add the bypass wire.

--- Quote from: thm_w on August 30, 2023, 11:24:20 pm ---BTW I have a similar spot welder, worked well, until the battery drained and now its no longer working. Tried some regular packs and they can't weld at all. So be careful to keep the battery charged at ~60%.

--- End quote ---
Thanks for the warning! I'll try to keep it in mind!

Martinn:

--- Quote from: srb1954 on August 30, 2023, 10:30:55 pm ---Since you have already got a Tek A6302 it might be worth considering looking for a Tek CT-5 current transformer to go with it giving the benefit of a wide frequency range (0.5Hz to 15MHz), high pulse handling capability (50kA) and the wide sensitivity range (5000:1) of the A6302.

--- End quote ---
Didn't know that these exist! There is even one nearby (<1000 km) for quite a decent price.
However as my storage space is limited I am reluctant to buy stuff I probably need once in a decade. Also if I purchase some kA measurement equipment it should at least be able to measure my TIG welder current (not that it would need measuring...) and a non-DC transformer would not be ideal for that.
Anyway thanks for pointing out!

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod