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Type: Posts; User: Al_The_Man

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    Re: 2 motors - 1 VFD

    I have used a single VFD to control two spindle motors, but this was a double ended lathe, where the chuck held each end of the work piece. (Railway wheel axle).
    Where the load varies on each motor,...
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    Re: Electronic home switches made easy!

    There has been many posts, but see post #13 for Romans set up and the resistor.
  3. Re: AC Stepper Drive Toroidal Transformer

    The nice thing about a toroidal transformer it is easily modified if the voltage is off by a little, i.e., either add or remove turns, typically a toroidal is not more than 2 turns/volt.
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    Re: Electronic home switches made easy!

    The SS400 series need a pull up resistor from output to 5v+, if not provided.
    5k to 10k
  5. Re: Noob Question Regarding Mechanical Origin

    Couldn't find a cross for those, unless someone else ID's them or they have a diagram on the side, it may be guess work and result in a little reverse-engineering!
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    Re: Electronic home switches made easy!

    If using the SS441 based units then they are open collector transistor output, and require a magnetic field to operate. or turn on the output.
  7. Re: Noob Question Regarding Mechanical Origin

    What is the machine system?
    e.g. Fanuc? Mitsubishi? Mazak? etc
    It is not unusual for a display on some systems to show where it thinks it should be and where it actually is, i.e. stalled.
    At start...
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    Re: Ground Point

    Agree!
    Good comment!
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    Re: Ground Point

    Installed many systems earth grounding the DC supplies common and have not had a problem, I set up a 1/4" tapped copper ground plate and take every earthed common to it.
    Together with...
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    Re: Ground Point

    The AC service supply has a grounded neutral at the supply transformer, so any power conductor connected to this supply is referenced to earth ground, which means that any current connection/leakage...
  11. Re: M16D: How to have ±10 V analog for servo velocity control?

    The early drives were velocity/ voltage feedback, used a comparitor input and required double tuning procedure, Inner loop, motor-tach-drive, and the outer loop encoder to controller.
    The later...
  12. Re: M16D: How to have ±10 V analog for servo velocity control?

    That is to be expected if a servo drive, probably the answer is to make up a decay circuit for the ±10vdc signal.
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    Re: Software for electrical diagrams?

    Although having worked on numerous machines of Continental European origin, I have never really got used to the top down progression method, (plus the symbols)!
    I originated from the UK, where I got...
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    Re: Software for electrical diagrams?

    I use AutoCad also, and over time have acquired some electrical image libraries that were out there free.
    I moved up to ver 2006 some time ago.
    There is also a free copy of NFPA79, "Industrial...
  15. Re: M16D: How to have ±10 V analog for servo velocity control?

    That board does not appear to support ±10vdc servo input .
    In all the DIY projects I have designed or set up, they have all been analogue input using drives in the torque mode.
    To operate these...
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    Re: How to detect VFD faults

    The Outputs M01-M02 show as the output of a pair of opto couplers with MCM being common.
    Therefore either or both M01 or M02 can be used as outputs up to 50ma.
    Unfortunately they tie the commons...
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    Re: Solenoid Valve

    I saw it happen plenty of times with mechanical maintenance service teams.
    One of the reasons I always spec'ed in DC coils for new projects, it can't happen with DC.:idea:
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    Re: Solenoid Valve

    If these are AC valves, if any side is activated manually that happens to be under power at the time, means an instant coil burn-out! :eek:
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    Re: Solenoid Valve

    What is wrong with the solenoid?
    Have you contacted a local hydraulic supply house, usually they are able to sub a replacement.
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    Re: How to detect VFD faults

    Two outputs can be used, the fan can be set to either come on in run or when power is applied to the VFD.
    One output set to activate when 'At Zero Speed' is sensed.
    The N/C temp sensor can be wired...
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    Re: Thermistor in ATC spindle

    So where did you get PTC 150 thermistor?
    Contact closure sensor would be used on a input to the VFD that would source or sink an input, usually Opto isolated.
    Therefore if so, no external supply...
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    Re: Thermistor in ATC spindle

    Strange comment from the manuf, "The thermal switch is either on or off" , thermistors change resistance with temperature, and are usually around 1.5k.( PTC = Positive Temperature Coefficient)
    ...
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    Re: Gecko similar option for AC servo?

    There are several reasons, servo systems such as Fanuc, Mitsubishi, have proprietary methods of closing the servo loop.
    Using systems such as Mach etc, the controller does not close the loop, so you...
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    Re: Mazak T2 parameter input format?

    What machine is this?
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    Re: AE200 VFD 10v analog control problem

    You do have it set for a 2pole motor I assume?
    If not, this could be the issue.
  26. Re: Plama large scale pipe cutter, drive motor question

    Legacy thread from 8 Years ago!
    Maybe solved it by now!:)
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    Re: Matching drives to old AC servos?

    Did you see this older post?
    https://www.cnczone.com/forums/knee-vertical-mills/50787-cnc-cam-mastercam-software-forum-posts.html
  28. Re: SSR or mechanical relay to turn on spindle?

    That is typical running current, the momentary inrush is much higher.
    I am suspicious of the true rating of the typical small cube relays, if this is what the unit is fitted with.
    Especially when...
  29. Re: SSR or mechanical relay to turn on spindle?

    Going by the size of the unit, I would guess it uses the PCT type of cube relay.
    I prefer the traditional style of relay, a little larger, but the rating is a little more realistic.
    The pins on the...
  30. Re: SSR or mechanical relay to turn on spindle?

    It suggests mechanical type.
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