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  1. Hi all,

    thought I'd share with you this relic from a different era..

    I work with a machine shop that has a 1970 Turret lathe, Herbert, Model 2D, 6-turret, with peg board control, bar feed and hydraulics feed. This pegboard must be one of the early forms of CNC, the pegs are resistors that allow you to program a sequence, it's so old school that I tell this guy this should be in a museum!

    He uses it sometimes, works all right though it could use some hydraulics servicing and general tidying up. Do you guys think it's worth updating it? Does it have any value as it is?

    Click image for larger version. 

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  2. #2
    Is it one of the early EMI-MEC Nichols controls using a Uniselector or a later version with the array of 48v Dc relays replacing the uniselector ??

    if I remember correctly the electronic dwell timers us the 2N2046
    unijunction transistor

    the yellow programing pins have a diode inside
    at each step multiple pins can be plugged in to power several relays and solenoid valves
    the diodes form a diode "OR" gate to prevent the +48V from one step of uniselector (or later sequencing circuit) back feeding to other step outputs

    John

  3. #3
    Worked on these back in 1970s whilst serving my apprenticeship .Also went to the factory in East Grinstead on a training course to programme. The factory where I worked had over 40+ lathes of various types either bar feed for first operation work or chuck loaded via a magazine for first and second operation work all, using this sequence control system. As a setter I would have six machines and an operator to assist, who would attend to the loading of bar, billets or part machined component plus removing swarf. Happy Days. They were still in use up to the late 1990s.

  4. #4
    Herbert 2D what a classic, worked on a pre automation one as an apprentice in 1954 and converted one ~ 1970 to groove sintered clutch release bearrings using Norgren Fluidic modules, used as an example in their advertising magazine.

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