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  1. Minder

    Help with sensing a stopped sprocket

    I didn't know there was a penalty??:p Craig measure from DCM to the +10v terminal, if OK then you should be able to supply from the VFD, if not just connect the circuit common to DCM and the DI3. If a separate supply just use 12v supply. Note: R1 is connected to pin 3 not PWR. The P.B. sw...
  2. Minder

    Small DC motor powering another DC motor to generator

    One of the most efficient way to duplicate a 'Synchro' is to use two identical bipolar stepper motors, the slave will follow the master in rpm and position. A DC motor will produce/generate a DC voltage, NOT AC that can be used to drive the slave but it depends on the load of the slave, it...
  3. Minder

    Help with sensing a stopped sprocket

    See what I can do today or tomorrow. M.
  4. Minder

    Help with sensing a stopped sprocket

    I can whip up a simple 555 circuit if you want to pursue that method, the inputs appear a s N.O. so if you place a N.C. P.B. in series with the input it will open up during start up. You will have to decide on a elapsed time period where it is considered stopped. M.
  5. Minder

    Help with sensing a stopped sprocket

    You could use the output of the 555 direct into the DI3 which is External Fault input and is a sourcing input so when pulses are present the 555 will be high and will output a low on pulse fail, Google 555 missing pulse detector. You should not need a relay. It also looks like you have access to...
  6. Minder

    Help with sensing a stopped sprocket

    The Prox sw has a open collector NPN output so you should be able to interface direct to the VFD depending of whether the input is sink or source, see pdf. What is the part No. of the VFD? But if you need to detect a stopped condition only then you will need a missing pulse detector that can be...
  7. Minder

    Reed switch

    Normally for ease/economy of wiring also fail safe, N.C. type are used, as in alarm systems I quoted. See ebay 321861539982 M.
  8. Minder

    What is this(IEC60384-14)? w/pic

    If a series RC component it is know as a 'Snubber' placed across AC devices to act as a suppressor. M.
  9. Minder

    Easy Machine To Wind Transformer

    A hand winder is very easy to build and fit a mechanical digital rev counter on it, usually transformers consist of E I laminations that are inserted once the bobbin winding is complete. M.
  10. Minder

    Reed switch

    I always tend to use COM instead of GND to avoid the Earth confusion. We tend to lable the power e.g. 12DC+ 5vdc+ etc but neglegt the minus side.. Often the commons are usually simple notation instead of the same practice as 12vcom, 5vCOm etc. M.
  11. Minder

    Easy Machine To Wind Transformer

    I once did a stint in a motor winding shop in my youth where we used hand crank versions with a suitable bobbin for holding the correct size of coil. M.
  12. Minder

    Successfully unsoldering a big relay

    Yeah, that would come under 'miniature' for the ones I use.;) It looks like a Finder 40 series they rate it as 'The Finder 40 series are miniature PCB or plug-in relays' If it is switching an inductive load, it may not reach the 8Amp contact rating. M.
  13. Minder

    Reading PIC ports

    You either need a way to know when a key is pressed, either by periodic scan or interrupt. Once you input the 4 digit binary value, you use a lookup table with all the individual bit values, this is then output to the port and turns on the relative bit, a 2n7000 on the output could be used on...
  14. Minder

    Reed switch

    The OP mentions SWitches, so they would either have to be NC type or OR'd N.O. Ones that have terminals are usually the window/door alarm system types and are N.C. all in series, (NAND'ed). M.
  15. Minder

    Help with connecting&controlling THK kr20 Linear Actuator

    Not that I think you will even need an encoder for your application, but it is also often the practice to increase the resolution of the encoder by either 2x or 4x, this is done by reading either two rising or falling edges or all 4 edges for x4 resolution. You also need to measure the pitch of...
  16. Minder

    Reading PIC ports

    In Assembly programming the LSB is usually on the right not the left as you have shown, i.e. 5 = 0101, with a 16F you can use a look up table based on reading the four bits then extract the 8 bit value with the corresponding bit set for and out put to the port. Look for look up table methods...
  17. Minder

    Help with connecting&controlling THK kr20 Linear Actuator

    The motor just requires a 5v DC supply the + and - refer to the voltage polarity that will give you the phase of the quadrature signal, reverse + - voltage will reverse direction of the motor and reverse the output phase of the encoder , (Google quadrature encoder for more info). The encoder...
  18. Minder

    Help with connecting&controlling THK kr20 Linear Actuator

    Incidentally you do not need the encoder signals and supply to it unless you are using some kind of closed loop feed back system. M.
  19. Minder

    Help with connecting&controlling THK kr20 Linear Actuator

    They appear to be micro DC motors, the + and - are the motor power, which if ordinary DC motor you can reverse polarity to change motor direction, the other signals are for a quadrature encoder, if needed. The encoder output is shown with the motor +&- signals shown, if the motor polarity is...
  20. Minder

    plcs

    Presumably you are using PLC in the industrial control context? If so a PC would be the better choice. M.
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