How to choose and test the microwave transformer? How many turns to wind into the transformer winding? How to make electrodes for welding batteries 18650.
Detailed description of how to make spot welding for batteries 18650 and others.

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What you need to assemble the spot welding and where to get:
👉 The transformer from the microwave or similar, power from 800 watts.
You can find it at a flea market on the Internet or in repair workshops for household appliances.
👉 Copper wire cable with a cross section of 35-70 mm squares.(00-2 AWG). You can look for a welding cable, it also has good flexibility. You can use audio cable. But only copper, not bedded aluminum. If you take off the insulation, it is better to take a cable with plastic insulation and buy a theormoroshrinkage.
👉 Сopper wire tips
👉 Rigid 4-6mm copper wire for spot welding electrodes
👉 Timer for spot welding 40A version for 1 transformer and 100A version for 2 or more transformers.
You can buy it here: http://alii.pub/6dxnjq
👉 Pedal or button NO with NO contacts: http://alii.pub/6dxndb
👉 Handle holder electrodes welding http://alii.pub/6dxmqr
👉 Nickel plated strip http://alii.pub/6dxmlw
👉Copper wire 16-13 AWG to the to electrical socket.
👉 Hammer, hacksaw, screws, skilled hands and a desire.
Since the video is long, to save your time I added timecards:
00:00 video summary.
00:50 list ,what do you need to create point welding?
02:35 transformer health check
05:40 removal of the secondary winding of the transformer
08:23 secondary winding wire selection
09:28 what to do if you cut the secondary winding
10:24 which cable to choose
11:27 winding direction of secondary winding
11:48 2.5 or 3 turns?
12:33 spotter, how to combine multiple transformers
13:50 wire insulation replacement
14:34 How best to wind the secondary winding
15:28 options how best to end the wires
18:04 spot welding handle
18:50 spot welding principle
20:16 about timing spot welding
22:44 diagram for spot welding timer connection
26:15 Inspection of assembled welding to 0.2mm tape
28:50 how many windings do I roll?
30:22 can you hold the electrodes with your bare hands?
31:38 comparison with spot welding 2 turn 000 AWG
33:15 Welding of thick metals and wire
#DIY #spotwelding #18650