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  1. Minder

    Not getting the required output from vfd

    The modern style VFD came in around 4 decades ago due to the introduction of new switching devices such as the IGBT, Mosfet etc. These created variable frequency and PWM of the wave form. The old 3 phase SCR drives did not control the frequency as they operated in a full wave bridge...
  2. Minder

    Not getting the required output from vfd

    Evidentally it is not a typical VFD by the look of the description, a link to the manual would help. BTW VFD's typically do not use SCR's , IGBT's are the common switching devices or Mosfets, in some cases. M.
  3. Minder

    Motor Control project

    Apparently that VFD was designed specifically for T.M.'s so it may not have the features of a regular VFD. If you can find a manual on it it should show how to use the probably limited usage. M..
  4. Minder

    when you learnt and become pro, did anything amazing happen?

    For me I had no choice. I had an invitation from Her Majesty to join her in the Western Desert for a couple of years, needless to say she didn't show, so it was just me and a few others who also got the invitation!.:rolleyes: M.
  5. Minder

    Simple DC Motor setup - NEWBIE HELP!!!

    It is a 12vdc motor, but you need to know the current rating. For this application a simple linear supply is best, transformer and a bridge rectifier. No real need for regulation. SMPS supplies are not the optimum P.S. for a motor application. M.
  6. Minder

    Simple DC Motor setup - NEWBIE HELP!!!

    Does 5a supply look OK for that motor? What are the spec's on it? M.
  7. Minder

    Simple DC Motor setup - NEWBIE HELP!!!

    The G.B. in your link is 20rpm so a reduction to 12rpm is not far off, I see the link does include the PWM controller. Saudi Arabia and you find germination difficult, temp wise? o_O M.
  8. Minder

    Simple DC Motor setup - NEWBIE HELP!!!

    It is generally possible to find out the torque needed to turn the jug using measure length of rod etc axially to the shaft and then use a spring fish weigh scale etc to find the point that the drum begins to turn. In-lb, N.m etc. I would have used a 24vdc or above motor, but the 12v version may...
  9. Minder

    Programming languages and MC selection.

    There is some online tutorials from Gooligum Australia, there is a fee for the full blown course, but there is a bundle that is free including both Assembly and C. Should be enough to get you started. The small 8 pin 12F versions have a few features to get you started, M.
  10. Minder

    circuit breaker switched off from distance ?

    Yes. It is a breaker that has a trip coil in it for remote operation, often used in enclsoures where if the door is opened a limit SW trips the breaker. M.
  11. Minder

    Newbie; 3 phase, 460V, 12 wire motor; what if wrong hook up?

    Either way it was wrong! The hook up seems clear to me, why was it not hooked up the way the plate shows? Fortunately It most likely did no damage to the motor if the breaker tripped almost right away. The motor wingdings are two sets of Delta windings, either in series or parallel. Did the...
  12. Minder

    Hello from London

    I was under the impression that only one person Here could bestow the OBE in order to be addressed as Sir?o_O M.
  13. Minder

    Newbie; 3 phase, 460V, 12 wire motor; what if wrong hook up?

    You can draw out the Delta connections for each set of windings to see the result. It is wound double delta But as mentioned, if L1 L2 phases were shorted it did not even get chance to turn before it blew the breaker, How come it was hooked up wrong, it is plain enough on the plate? M.
  14. Minder

    Treadmill control board SIP 20 Pin part number required.

    Could also well be a OEM own custom part, often done. M.
  15. Minder

    What do you reckon the most produced component is?

    I thought the question posed in the OP was the most numerous IC!!? M.
  16. Minder

    3 phase wide range relay

    You could make a circuit up that would pick up one relay. It would involve a 3ph rectifier off the supply, a resistor from the +v to feed the gate of a Mosfet which in turn would pick up a DC relay of your choice. M.
  17. Minder

    What do you reckon the most produced component is?

    In the DIY area, the 555 must be up there! M.
  18. Minder

    round slotted nut tool ?

    I have made my own from a wide screwdriver. If this is for more than a one-off or for future use, you could purchase a wide enough screwdriver and construct one if needed. M.
  19. Minder

    Relay That Toggles On & Off With No Hold Current

    The magnetic pulse latching relays have memory, needs a reverse DC pulse to unlatch. M.
  20. Minder

    MOVs-identity and testing

    There is no absolute test, they generally fail due to over-voltage and the failure is visible, if no number on it, the working voltage and circuit design it is protecting comes into consideration. A VOM ohm meter will usually register open circuit or high resistance if good M.
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