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…


  1. #1 by rkward on 2016-07-25 - 07:46

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

    • #2 by Ed on 2016-07-25 - 09:55

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

      • #3 by rkward on 2016-07-25 - 11:29

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

  2. #4 by steve on 2016-07-25 - 13:02

    “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. #5 by hexley ball on 2016-07-25 - 13:37

    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.

    • #6 by Ed on 2016-07-25 - 16:02

      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.

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