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  1. Minder

    Can I replace a brown ceramic capacitor with blue ceramic?

    Yes it should be OK, unless you think it might clash with the other colours! :p And Bertus pointed out the error .
  2. Minder

    Looking for a specific light-activated switch (12V DC)

    Wide open question! What is the application? Stand alone unit or circuit board mounted etc.. There are many that offer both options. What is the sensor operating in to?
  3. Minder

    Bonehead connected to the electronics forum

    The AC L & N start out as both identical conductors, i.e., no difference will be detected between either. When one is connected or referenced to earth GND it is then Referred to as Neutral. Otherwise nothing has changed. P.S.: There is no current to ground, or through ground, unless a fault occurs.
  4. Minder

    Bonehead connected to the electronics forum

    A two blade AC Plug in N.A. has the neutral on the larger pin, the live on the smaller.
  5. Minder

    Capacitor mF vs. uF confusion when replacing

    For a start, the µf , mf, MFD is all the same in this context. If the cap is in circuit all the time and connected to the start winding without any kind of disconnection means, either internal or external to the motor, then it cannot be a electrolytic, as I already stated, the most durable types...
  6. Minder

    Triac control system for soft start

    For some Triac phase control info, look up Fairchild AN-3006 and AN-3003.
  7. Minder

    Capacitor mF vs. uF confusion when replacing

    I suggest taking the cap into a local motor rewind shop and asking them to identify it, they should also have a replacement. Or a local electrical supplier. For motor applications< I would steer clear of Chinese origin, these are the main cause of Chinese supplied motor failures.
  8. Minder

    Capacitor mF vs. uF confusion when replacing

    At 60µf I would suspect that is a bi-polar dry electrolytic version, if so, it is a start cap only and requires a start switch in the motor or motor circuit in order to switch it out when up to speed. They cannot be left in circuit for more than a few seconds. If it is a non-electrolytic, the...
  9. Minder

    Capacitor mF vs. uF confusion when replacing

    The whole idea of the start cap is to give the optimum phase (~90°) shift to the start winding. There may not be a great deal of difference, only a current check of the winding would tell.
  10. Minder

    Capacitor mF vs. uF confusion when replacing

    The mF is misused due to the originator not using Mu . It is the same thing. The 60µf may have been replaced previously due to unavailability of a 45µf version. If in doubt, maybe go with the manual, ensure you get a Motor Start rated cap.
  11. Minder

    What is the type of this 40pin female display plug?

    Look up IDC headers, there is is two common pin spacing dim's for them.
  12. Minder

    I'm new and need help with a capacitor

    You need to look for one of the WIMA products MKP4 etc, most distributors sell them Mouser, Digikey etc. What is the caps function? WIMA MKP-X2Metallized Polypropylene (PP) RFI-Capacitors Class X2.
  13. Minder

    problem with the table saw motor. Please help!

    It is impossible to diagnose a remote problem precisely, all the offered suggestions so far have been based on the info supplied. and everyone's personal experiences. All you can do is Initially is to go the cheapest route in the hope that it will produce a cure. Although it does look like the...
  14. Minder

    problem with the table saw motor. Please help!

    As I see it, there is two minimum options: 1/ Buy a replacement saw. 2/ Obtain a set of new brushes and try them, if no success, go to 1/. BTW, if you have a job obtaining brushes, I have had luck in the past contacting Helwig-Carbon, they make replacement brushes for industrial machines etc...
  15. Minder

    problem with the table saw motor. Please help!

    If you do not want to go the OEM parts route for a source, then take them to a local motor rewind shop etc and see if they can make an educated guess on a replacement. Obtaining them off the web etc, i.e. just going by existing size will be a crap shoot. Technically if the com has ridges, you...
  16. Minder

    problem with the table saw motor. Please help!

    You should use the same composition and of course, length/size, IOW, if possible obtain manuf. replacements. ! Different brushes have different copper/carbon content, depending on the application.
  17. Minder

    problem with the table saw motor. Please help!

    If it has had a great deal of use, Another thing to check, while you have it down is the bearings.
  18. Minder

    problem with the table saw motor. Please help!

    If you have an arc (blue-ish) , or flashes that follows a circular path around the com as it rotates, you most likely have a short in the armature. If this is the case, and if if in doubt, remove the armature and take to a rewind shop and ask for a growler test to be done. BTW, the evidence from...
  19. Minder

    problem with the table saw motor. Please help!

    Mica insulation has not been used for decades, where undercutting was necessary, now it is a 'wearable' material that wears down with the copper.
  20. Minder

    problem with the table saw motor. Please help!

    Generally there is no capacitor on a Universal motor, induction motors, yes.
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