The Smell of Molten Projects in the Morning

Ed Nisley's Blog: Shop notes, electronics, firmware, machinery, 3D printing, laser cuttery, and curiosities. Contents: 100% human thinking, 0% AI slop.

Mini-Lathe: Control Box Cover Screws

It’s easier to remove the leadscrew while dismantling the carriage and apron, which requires removing the cover from the control box containing all the switches & knobs. Come to find out the “cover” actually holds all the gadgetry onto the headstock:

LMS mini-lathe - control box interior
LMS mini-lathe – control box interior

I want to replace the Power indicator with something visible in normal shop light; judging from the connectors and overall brightness, it’s a neon bulb inside a green housing.

Anyhow, the four screws holding cover to the headstock weren’t identical:

LMS Mini-lathe - cover screws
LMS Mini-lathe – cover screws

I thought the oddball screw was deliberate, perhaps fastening that corner to a plastic frame of some sort, but it turned out to be a quick fix for a boogered tap job:

LMS Mini-lathe - mistapped cover hole
LMS Mini-lathe – mistapped cover hole

A bag of 4 mm knurled brass inserts will arrive in a while, after which I’ll drill out all four holes and epoxy inserts in their place. Might have to use stainless hardware, just for nice…

Comments

7 responses to “Mini-Lathe: Control Box Cover Screws”

  1. rkward Avatar
    rkward

    And here I thought sheet metals screws were “universal threads” ;-)

    1. Ed Avatar

      “Bash to fit, file to hide, paint to cover…”

      1. rkward Avatar
        rkward

        Ah, another variation, I like it! “Cut to size, beat to fit, paint to match”, is the one I use.

  2. steve Avatar
    steve

    “The bigger the glob, the better the job” (usually applies to soldering and glue). “Grinder and paint makes me the welder I ain’t”.

  3. hexley ball Avatar
    hexley ball

    Have to say that I was not expecting to see 105 degree capacitors and a nice, beefy, common-mode choke on the power lead. Looks like the electronics team is doing rather better than their mechanical colleagues on this product.

    1. Ed Avatar

      It’s definitely not the worst chunk of electronics in the Basement Laboratory!

      The mysterious connector (lower left foreground) suggests a programming interface, RPM pulses for a display, or diagnostic outputs. Can’t tell without doc and, of course, there is no doc.

  4. Mini-Lathe: Electronics Box Screw Insert | The Smell of Molten Projects in the Morning Avatar

    […] Two bags of knurled brass M4 inserts arrived from halfway around the planet, so I could fix the offending hole behind the LMS mini-lathe’s electronics box: […]