Magnetic Precise PCB Probing

In addition to PCB vices , I immediately planned to make these probes. I didn't find the ones I wanted. And yes, all the details are very small and require special processing, but the result is worth such an effort.

 

For making probes, I bought stainless steel spring wire. Specifically, in my case, a wire with a diameter of 0.7 mm will be used. For insulation, a heat-shrinkable tube with a diameter of 0.8 mm is used, its shrinkage is almost three times. Attaching the wire to the probes with simple soldering will not work, at least I do not know such a method. I would be grateful if you tell me such a flux or something else. But there are at least two ways out: the first is crimping into terminals; second - pulse welding. I chose the second method, the more there is something to use.

 

Also, the probes must be sharpened. At one time I made this wonderful tool , which I still use today. But you can use what you have. But keep in mind, this is stainless steel, it is difficult to process it :)

 

Magnets are used with a diameter of 9x5mm. The question often arises why I often use this size of magnets ... But the answer is extremely simple - I just have a lot of them. Well, the column (rod) is a carbon fiber rod with a diameter of 4 mm, which is also available. But it is possible from other materials, they are also presented in the list with links.

 

I usually use 28 AWG silicon insulated wires. The diameter of the insulated wires is 1.3mm and they are also very flexible compared to PVC insulation. Connectors - in my case Dupont. Screws M2.5x16mm.

 

The probes are designed in such a way that they have complete freedom of positioning, both in height, length and inclination.

 

PS: Make the length of the probes whatever you want, as you like...

See the video for details:

See also:

If you liked this thing - let me know by putting like!

Parts links below:

• Stainless Steel Spring Steel Wire
• Heat Shrink Tube
• Carbon Fiber Rod D4mm
• Glass fiber rod D4mm 
• Dupont Connector Set
• Flexible Silicone Wire 28 AWG
• Button Head Screw M2.5
• Inserts Nut M2.5
• Round Magnet 9x5mm
• Universal PCB Board Holder
• Magnetic third hand big set
• Magnetic third hand small

Links to used tools:

• Bifrc DH20 Handheld Spot Welder
• NOGA deburring tool and Blades
• Crimping Pliers Tool SN-01BM
• Crimping Tool
• Crimping tools Pliers For Tube/Sleeve/Needle
• Angle grinder

Required files:

project-files.zip

My new machine:

My favorites:

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Design by Valera Perinski on MakerWorld (license: BY).