Search results

  1. Minder

    I need a relay HJR-3FF-S-Z 24v coil

    Does it have the 'nib' half way down the side? It would pay to open the relay as per my other post, to possibly cure that problem. They are only there for the duration of the de-fluxing of the board. M.
  2. Minder

    I need a relay HJR-3FF-S-Z 24v coil

    First, check the printed circuit to the power pins, often this is where the problem is, if you have established it is the relay, if they have a vent plug on top, remove it after replacing and before putting the unit back in use. If it does not have a vent, make one with a small drill, it can...
  3. Minder

    Ground control to major tom

    It is a Plane that can take many forms. M.
  4. Minder

    Ground control to major tom

    With ref to post #8, hence, equi-potential bonding!.;) M.
  5. Minder

    Ground control to major tom

    ...And to throw another in, there is equi-potential bonding (earth grounding) of industrial systems to prevent "Ground Loops". A ground loop is a ground conductor or part of a grounded system that may have a difference in potential between one point and another. which is not desirable. M.
  6. Minder

    Ground control to major tom

    I am not surprised, as the term Ground is currently used, there are a few miss-used terms and connotations, Chassis ground? Earth ground? Power Common? Logic Common etc. Not only that, but the Earth GND symbol is often used to denote a power common. When you look at most typical schematics, it...
  7. Minder

    Ceiling Fan Capacitor Question

    Use two separate ones, preferably Not Chinese origin. M.
  8. Minder

    Jumper Wires and Breadboards

    Amazon https://www.amazon.ca/WayinTop-Breadboard-Arduino-Preformed-Solderless/dp/B07PTYBFDT/ref=sr_1_4?dchild=1&keywords=jumper+wires&qid=1594231994&sr=8-4 M.
  9. Minder

    Should a line tester light up when inserted into grounding socket?

    The path for those screwdriver neon testers is from live through the body resistance to ground, they will light even if stood on a milk crate! You should not see a light from the GND terminal or pin. What part of the world are you in? Your best bet is to qualify it with a meter and do a test...
  10. Minder

    Treadmill switches off when set speed exceeds 2km/hr

    Normally with a P.M. field, D.C.motor, shorting the two leads and giving a good spin would result in definate resistance to spinning it. Another test is to back feed it and the motor should generate a DC voltage, directly proportional to the RPM and the rated voltage at max rpm. A automotive...
  11. Minder

    Treadmill switches off when set speed exceeds 2km/hr

    What is the number on the main board? Motor braking with the leads shorted and spun is normal for a P.M. D.C. motor It is usually easier to run and trouble shoot the board separately on the bench, but in some cases needs a small PWM drive board to do it. M..
  12. Minder

    Treadmill Motor Board / Motor issue

    Incidentally the 30amp PCT (black) relay shows the vent plug (dimple centre) still closed, if that relay is switching any where near its rated value, you can reduce potential problems by opening it, generally they have a dimple that pops off, this reduces the ionization of the interior when...
  13. Minder

    Shaded pole motor.

    As mentioned, the shaded pole motor is only really useful for fans etc, that use a triac for speed control. Also you cannot reverse them, electrically, anyway. You can make a simple small DC PWM/Mosfet combo using a 555. Lots of circuits out there. I just picked up some very nice automotive DC...
  14. Minder

    Need help with a failed controller for a treadmill.

    Most of the T.M.s I have come across have the track speed sensor that comes into the main board but is then sent up to the console where the speed is compared to the programmed speed and then a corrected signal is sent back down to the main board speed controller. M.
  15. Minder

    Best way to disconnect?

    Replacing the battery and jump starting are two different issues? M.
  16. Minder

    Best way to disconnect?

    Depends on the application and the source. For example, when disconnecting an automotive battery, always disconnect the negative first, this is in the event that the wrench comes in contact with the frame, with the neg. it won't matter, but if disconnecting the Pos first, and the same scenario...
  17. Minder

    VFD for the air blower

    Universal motor device. Requires a Triac phase angle controller. M.
  18. Minder

    Inductive Proximity Sensors

    You don't need the pull up resistor marked with an arrow. M.
  19. Minder

    Burned stepper motor driver board in my new Arduino project

    Here is useful info when selecting motor/drive https://www.geckodrive.com/support.html M.
  20. Minder

    Burned stepper motor driver board in my new Arduino project

    Essentially what these drives do is ensure that the motor rated current exists at all times, The higher voltage enables this, by sensing the actual current and controlling it accordingly as the inductive reactance increases. IOW, the current should not vary from the rated value. Before the...
Top