开云体育

You might find this photo interesting too.

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The calipers really don't like the power supply a long way from the unit.? Tends to result in noisy readings even when powered from that plug in cable.

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So what I did is build my own batteries.? A bit of brass tube from the local model railroad shop.? Both Tantalum and ceramic surface mount capacitors soldered in and then filled with epoxy.?

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This replaced the battery and is charged up when power is supplied through the cable.? Holds the readings between power bumps and keeps interference from screwing up the readings.

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Mine have been connected to a Shumatech DRO-350 now for 15 years with zero maintenance.

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John Dammeyer

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From: [email protected] [mailto:[email protected]] On Behalf Of Julian
Sent: July-25-22 3:50 PM
To: [email protected]
Subject: Re: [digitalhobbyist] Lathe DRO

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That's a rather elegant design, John.? Perhaps I should have checked Thingiverse before I made my version.?

Mine was only ever going to be a temporary item though.? The finished version will be soldered directly to the pads on the pcb.? I wanted to hold back on the soldering until I had a reasonable idea it was viable, leaving me with a working, unmolested caliper if it wasn't.?

On mine the contact strips were taken from some spare USB sockets and are only 0.8mm wide ... very fiddly work.? They were initially held in place by melting plastic tabs over the top of them, however, I made the stupid mistake of not soldering the wires to the contacts before before melting the plastic which resulted in the misaligned pins and application of hot glue you see in the photo.?

Live and learn I guess!??