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  1. Minder

    Regenerative power in induction motor ( braking resistor)

    The normal method in a VFD is to switch off the control devices and turn on the braking resistor, IOW the resistor is not in circuit during motoring. M.
  2. Minder

    What is making a squealing noise on this plug in?

    Your welcome. Check to see if the transformer is made up of steel laminations, if so it is a linear supply, also the primary connections appear to be fed right off the AC. M.
  3. Minder

    What is making a squealing noise on this plug in?

    It does not look like a SMPS so I would guess the transformer is vibrating due to the load. You could try taking the yellow tape off and spray or brush shellac on it. If you place a finger on the top of it can you feel any vibrations? M..
  4. Minder

    Electric motor needs start capacitor

    If you Google PSC motor you will see the normal connections. You would have two windings connect in series with the AC N connected to the centre point, the other AC L1 line would be connected to one other end of one winding, the cap would be connected to L1 and in series with the end of the...
  5. Minder

    Electric motor needs start capacitor

    It is extremely doubtful that there is a centrifugal switch, a start cap of that nature is usually larger. It is most likely a PSC motor which has a permanent cap in circuit on one winding, these types of motors usually have two identical winding's that can be alternated for change of direction...
  6. Minder

    Electric motor needs start capacitor

    What is the resistance between the three? Sounds like you may have one open. M.
  7. Minder

    Electric motor needs start capacitor

    Check and make sure if there is two separate windings, if there is and the resistance is the same for both, then any one can be used for the start winding, if they are two different values, then use the higher resistance one for the start. If one is not connected, it could be a second speed...
  8. Minder

    g'day from skippy land

    Two DMM's! Hope they weren't Fluke! Usually the fuse is in the higher current ranges, 10amp e.g.. Make sure you go to a higher range first, you can always come down. M.
  9. Minder

    Building power supply help

    What is the nature of the computers that have these odd supplies? Look for a couple of Wall-Wart's that have these voltages, the current demand is not that high. M.
  10. Minder

    AC fan not starting unless given a little 'help' - Start capacit lickely fault?

    As per Dorke, a small fan is usually a PSC motor which has a single cap in circuit all the time, have you actually see it to confirm it HAS a cap, as some are shaded pole motors. The most common reason is the sintered bronze (porous) bearings run dry. M.
  11. Minder

    Servo motor control with POT

    I presume these are RC servo's and not industrial versions? M.
  12. Minder

    Single Phase Motor Test

    You can usually know by the capacitor value, on PSC (permanent start cap) motors, the value is relatively small compared to cap start motors. These PSC motors are common on smaller pumps and fans. If you replace it I would stay away from Chinese origin. They are known to have a high failure...
  13. Minder

    PIC18 Serial Communications

    There is a method, not so neat to accomplish as a USART called Bit-banging. https://electronics.stackexchange.com/questions/66605/bit-banging-uart M.
  14. Minder

    High RPM Slip Ring Recommendation

    The motor is an out runner where the outer shell of the motor is the rotor. So anything would need to be attached to/around it. M.
  15. Minder

    Need Help Rebuilding Hamm's Beer Rippler Motor

    That was what I was refering to in post #4, when the start pulser failed, it was it was common to see a clock running backwards! The start direction is arbitrary, depending on the actual position of the rotor under a pole. M.
  16. Minder

    Which motor is the right motor?

    One of the largest forums for information, especially DIY is the CNCzone. I was in the CNC retrofit business for several years and know it pays to buy quality parts off the bat, For example, most start out by buying SMPS power Supplies for servo/steppers when not only is a regulated supply not...
  17. Minder

    Which motor is the right motor?

    What type of milling do you want to do? Do you need high RPM? For positioning, you could go to steppers for economy. Gecko make a good product. What is high about 24v? That is considered the very low end for a spindle voltage. For cheap software there is the PC based Mach3/4 M.
  18. Minder

    new but not too new

    One good source of books is Abebooks Clearing House. I have picked up some deals in the past. M.
  19. Minder

    Need Help Rebuilding Hamm's Beer Rippler Motor

    This is typical symptoms of clock mechanisms of this nature such as the older washer/dryer timers, There are several sources of these type of timers if you need to look for a replacement that may be cheaper than $75.00, Ebay for e.g. At least you know the rpm output. M.
  20. Minder

    new but not too new

    Very, It helps keep me sane!:p M.
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