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  1. Minder

    Converting 3 phase machine to single phase

    Just ensure the model is Sensorless-Vector not just V/Hz. M.
  2. Minder

    Converting 3 phase machine to single phase

    As I predicted it is a star-delta 4 pole induction motor, delta for 220v and star for 380-420. I don't see how they would have connected this motor for 1 phase. I suspect that may have been a generic drawing for hooking the contactor up when either type of motor is fitted. Also if the motor...
  3. Minder

    Converting 3 phase machine to single phase

    3ph in UK is 415v , single ph 240v. Not sure how a 3ph 415?v motor will run on that? Unless there is a delta connection for it. M.
  4. Minder

    Converting 3 phase machine to single phase

    What is your country of Origin? M.
  5. Minder

    Converting 3 phase machine to single phase

    Arbid: Can you show the info on the motor plate, the rpm and voltage will show the nature of the motor. Is there only one motor on this machine? As it looks like only one contactor. M.
  6. Minder

    Low cycle Pulse generator ?

    You may need a 556 but it should be possible, Do you use any picmicro by any chance? M.
  7. Minder

    Converting 3 phase machine to single phase

    I would be interested how you came to this conclusion? Having had a career of CNC retro-fitting for quite a few decades now, I don't see how it cannot be a consideration without further information on the machine. Also the myth of 'motor output must not be switched' is just that, a myth, it...
  8. Minder

    Converting 3 phase machine to single phase

    You would need to find a space in the enclosure or set up a new one to contain the VFD, If feeding from 240v 1phase service the motor is required to either be the same voltage rating or settable to 240v 3ph. A decent low priced one is Hitachi, I would stay away from the cheaper Chinese Huanyang...
  9. Minder

    Converting 3 phase machine to single phase

    Does the machine have 3ph devices on it such as 3 ph motors? As in the first screen shot. If so there is more than just a little re-wiring, If it is the case, you would need a VFD for them, It could be that the DWG just shows the difference in wiring between two different machine versions, not...
  10. Minder

    Need help identify part

    Look at tecor now littlefuse on DigiKey site, they will have a sub or equivalent.. M.
  11. Minder

    Measure the current of 3 phase induction motor

    SCADA is a general description of data collection/monitoring, and is custom programmed to your requirements, usually if interfacing with a PLC then you would most likely have to set up a Modbus interface with an appropriate PLC that has the feature. If wishing to use Arduino then you would need...
  12. Minder

    torque question

    If there is a pulley or a sprocket on the driven shaft, use a empirical test using a spring scale and a cord is one method, or rig up some way of using a torque wrench. Place it on the 45deg incline and obtain the reading that holds it stationary, if it is a size that makes it possible. At 5km...
  13. Minder

    PCB, protection

    Conformal coating of some kind is usually used for this application, I have never heard of its use for tinning copper? I have used the one you show in the link and it is for the application you are looking for. M.
  14. Minder

    Permanent Magnet DC (PMDC) Motor Controller

    Although all KB and T.M. DC motor controllers used in this application by many for spindle control etc, also do not offer galvanic isolation. As is this one that is practically the same as the OP's. http://www.harborfreight.com/router-speed-control-43060.html M.
  15. Minder

    Rheostat for Kitchen Appliance

    You could use the triac or 'dimmer' style, for 1500w it would be a little to big for the average lamp dimmer, more the power tool type. But it depends what else is in the appliance as it would control everything unless you intercepted the element. M.
  16. Minder

    Measuring AC usage - aka, LOAD

    Honeywell make just the type of units in their CSDA line. Also for a furnace you have 120v loads (fan motor etc) as well as the 240v furnace. I doubt your furnace is 80amps if residential, if so you must have a large area to heat. M.
  17. Minder

    AC Electric Motor -HELP-

    Really the first thing you should do is find out roughly what torque you need, this can be achieved from anything such as a spring scale or a small torque wrench, any reduction you may use will multiply the motor torque by the rate of reduction. If you have an auto wrecker nearby there are a few...
  18. Minder

    AC Electric Motor -HELP-

    You would be way farther ahead to find a low voltage DC motor such as used in a winch or other 12v/24v applications. M.
  19. Minder

    SCR Motor Controller

    The circuit does show a variable resistance and not using it as a pot. There are also many other examples out there that are very close. The one shown is a very common circuit been around for decades, so not sure why it would not work. M..
  20. Minder

    How to find RPM of motor using KY-040 Rotary Decoder Encoder

    Seems like a simple quadrature encoder, I have used plenty of encoders but not the libraries you refer to. It also looks like alot of examples out there on the web i would think you could adapt. M.
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