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  1. Replies
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    151

    Should be a direct connection between the VFD and...

    Should be a direct connection between the VFD and the motor, so it is not for powering the surface grinder through any switched contacts. If price is an issue, the replacement Teco drive for the FM50...
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    1,876

    One needs to put in perspective what is...

    One needs to put in perspective what is considered an "old" motor and the type of duty cycle/load that it will be called to do. On a lathe a VFD replacement is dependent on many factors, but I have...
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    287

    If you go with a 3 phase VFD, the derating varies...

    If you go with a 3 phase VFD, the derating varies a bit and you should run a DC choke. So something like the WJ200-075LF (7.5 kW) these days, the WJ200-055LF (5.5 kW)would be marginal but I have seen...
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    You need to directly wire the motor to the VFD,...

    You need to directly wire the motor to the VFD, depending on the VFD type and if you are running sensorless vector you can damage/destroy the VFD if suddenly disconnected from the motor while...
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    736

    Agree, that a name brand 30 Hp VFDs may run you...

    Agree, that a name brand 30 Hp VFDs may run you around $2500-$2800, then add a DC choke, enclosure, fusing, power switch/contactor and you may be pushing close to $3500 when all is said and done. You...
  6. Replies
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    736

    Depending on the duty cycle of the...

    Depending on the duty cycle of the compressor/work hours, you may need to be running the RPC for hours on end, you need the space and need to deal the noise, etc. Depending on the compressor details...
  7. In this size machine I see no benefit to a DC...

    In this size machine I see no benefit to a DC motor other than being much more expensive and complicated at this Hp level. Your best bet would be to pull the motor and take it to a local motor shop...
  8. Replies
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    762

    Single phase VFDs are common and reasonably...

    Single phase VFDs are common and reasonably priced up to 3 Hp. Beyond that typically one uses a 3 phase input derated to for single phase operation so a more expensive proposition. As far as...
  9. Most newer 3 phase input VFD's I have encountered...

    Most newer 3 phase input VFD's I have encountered allow derated single phase input. There is some variations as to if L1 and L2 are used or L1 and L3, and in some cases if a jumper from L3 to L2 is...
  10. Manual is informative: Wade Tool Co. -...

    Manual is informative:
    Wade Tool Co. - Publication Reprints - Wade 8A Toolmakers Precison Lathe | VintageMachinery.org
    Wade 8A Toolmaker's Lathe

    The spindle is a 2" 10 TPI thread, so unless it...
  11. I typically would recommend a 1750 or 1200 RPM 3...

    I typically would recommend a 1750 or 1200 RPM 3 phase 60Hz motor on lathes and over speed the motor. You will have too much Hp loss with a 3500 RPM motor if you need to spin it below say 20 Hz (~700...
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    Per manual AR 5 wiring recommendations, minimum...

    Per manual AR 5 wiring recommendations, minimum single phase 240VAC breaker size is 20A with 10AWG wire, 3-Phase output 12 AWG. I would probably go with a 30A breaker and 10AWG input, RPC output...
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    832

    An easier alternative may be to switch the motor...

    An easier alternative may be to switch the motor to something that is the next size down. The Victor 1640 seems to come with either a 5 Hp or 7.5 Hp motor, I doubt the latter would be able to start...
  14. Replies
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    832

    Overall a very poor design strategy to hard wire...

    Overall a very poor design strategy to hard wire the VFD inputs to the spindle control as you have outlined, there are no safety interlocks or resets through the stop position. The foot brake switch...
  15. Replies
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    956

    VFDs for the most part are direct connects from...

    VFDs for the most part are direct connects from the VFD output to the motor, the VFD motor tuning and parameters are specific to each motor. The controls for the VFD are via low voltage inputs and...
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    832

    If it is a constant Hp motor, than just run it on...

    If it is a constant Hp motor, than just run it on the 8P setting and run it to 120Hz. If the motor is not constant Hp then run it on the winding that gives you the highest Hp and use the VFD to...
  17. Replies
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    594

    You do not need an AC reactor and probably can...

    You do not need an AC reactor and probably can omit the noise filters. Typically you put a power switch at the VFD enclosure to turn the system off, followed by fusing. On smaller VFDs I typically...
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    Maybe this diagram will help. Many power supplies...

    Maybe this diagram will help. Many power supplies are more universal so accept a wider range of input voltage like 100-240 VAC. In machine applications with VFD's where I have set them up to run...
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    You have a mix of AC and DC motors, the surface...

    You have a mix of AC and DC motors, the surface issue problems are with a static converter and not an RPC. I would expect more surface finish issues with a static converter, but I do not use them. A...
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    969

    They all will be far more than you need. They are...

    They all will be far more than you need. They are sold through distributors, Wolf Automation probably would be the most informative and helpful regarding the Teco and Hitachi VFDs, although I have...
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    967

    You did not clarify what you have tried, so lets...

    You did not clarify what you have tried, so lets go through the other parameters. This is a UK model but the parameters may have been changed, depending on if the default is US or UK changes the...
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    This information is spelled out in the manual...

    This information is spelled out in the manual (see link), rating specifications are also on the VFD labeling. Input output ratings are on page 39 of the manual. Input parameters are outlined on page...
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    969

    They all have ramp up and ramp down parameters in...

    They all have ramp up and ramp down parameters in addition to defining if it is linear or S curve. One of the advantages of a slower acceleration is less belt slippage on start-up. Generally set...
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    Kind of mid pack price wise for 3Hp and under...

    Kind of mid pack price wise for 3Hp and under with single phase input, I think you will find that any of the following VFDs will be more than adequate:
    Hitachi WJ200
    Yaskawa V1000
    Teco E510
    See...
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    Other than the Phase Perfect VFDs I am not aware...

    Other than the Phase Perfect VFDs I am not aware of standard VFDs being able to drive the internal electronics of machines and/or drive different motors not running in unison. Looking briefly at the...
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