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Type: Posts; User: john-100

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  1. Re: Proximity Sensor Wiring Issue? Help needed.

    If you have this BOB

    429780


    you can use the wiring diagram from post 4 to power the LJC18A3-B-ZAX limit switches from 12V

    429782

    note - this only work with one switch connected to...
  2. Re: Proximity Sensor Wiring Issue? Help needed.

    Hi Gary

    looking at the first photo
    the diagram on the proximity switch is clearly a NPN switch

    a quick web search for LJC18A3-B-ZAX confirmed the switch is a Normaly Closed NPN proximity...
  3. Re: Proximity Sensor Wiring Issue? Help needed.

    Hi Gary

    this note -

    "My proximity switches are NPN normally closed, the wiring on them states the signal wire connects to positive,"

    does not read correctly for NPN proximity switches
    ...
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    Re: Suitable Relay

    I can't see any picture or data sheet for the relay you intend to use

    John
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    179

    Re: CNC Control Board Advise

    It looks like that should work

    both 2 & 3 pin connectors are labelled TTL/PWM on one pin
    and a pin labelled -
    which will be the common signal ground



    To me TTL has 5V logic levels like...
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    Re: CNC Control Board Advise

    having looked at your photo of the laser control boards TTL inputs

    this is how I would connect the BOB / motion controller to the Laser control board

    assuming the Laser TTL input is like a TTL...
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    Re: MX3660 with SainSmart Relay

    for a 120 V AC supply you can use a 15 K (15000 ohm ) 1W resistor to test
    for long term use use a 2W resistor

    120/15000 = 8 mA

    120V x 8 mA = 0.96 W



    for 140V supply use a 22...
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    Re: MX3660 with SainSmart Relay

    whats you mains supply voltage ?

    120 V AC as in NA
    or
    230V AC as in Europe ( in my part of the UK my supply is over 240V AC)

    with a 240V supply you could try 68K ( 68000 ohms) 1 W

    ...
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    Re: MX3660 with SainSmart Relay

    Hope your wife will get better soon
    Don't forget to look after your self , I know how hospital visits can take it out of you

    The Fotek SSR in post 30 has a snubber made from a 10nF capacitor and...
  10. Re: Mach3 5 axis controller board: not enough pins?

    the single BOB gives you 5 inputs (including the E stop)
    and 12 outputs from a PC printer port or motion controller

    if you use pin1 as the PWM to analogue converters input
    and pin 17 to...
  11. Re: Help Identifing old stepper controller board

    the faulty component is one of two current sense resistors used to measure the current through the motor coils

    427320

    with the shadow its hard to see if there is a decimal point between the...
  12. Re: Z-axis NOT functioning - stepper motor? Controller?

    what test equipment do you have ?

    while you can use a multimeter set to the 10V range to see the direction signal change

    its not easy to use a voltmeter to see the narrow step pulses

    a...
  13. Re: Z-axis NOT functioning - stepper motor? Controller?

    trace the 2 black wires to see where they go

    from the breakout board
    I would of expected a black and a red wire for each axis will go to the step and direction inputs on one of the 4 stepper...
  14. Re: Z-axis NOT functioning - stepper motor? Controller?

    Its hard to see from the photos but looking at the inputs to the stepper drivers

    the wiring to the middle stepper driver looks odd with 2 black wires

    427258

    going to what I think is the...
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    Re: MX3660 with SainSmart Relay

    I don't have an answer to all of the problems but

    I have had a closer look at the SSR board and the G3MB Solid State Relay used on the board
    and noticed there is not a "snubber " fitted across...
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    Re: MX3660 with SainSmart Relay

    Good a small step forward - the 1K resistor shown in the manual must be a link or a low resistance

    Most importantly you have to look after your self so your able look after your family

    ...
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    Re: MX3660 with SainSmart Relay

    if you have connected the MX3660 output between the +5V supply and the SSR input like this

    427118

    try adding a 1K5 resistor between the relay boards ground and input

    then measure the...
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    Re: MX3660 with SainSmart Relay

    I have had a look at the video and see the LEDs are dimm when they should be off

    427110

    whats the voltage between the SSR board input and common ground when it should be off ?

    it could be...
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    Re: MX3660 with SainSmart Relay

    is this the sainsmart 8x SSR relay board you are using ?

    427090

    I have found a readable PDF circuit diagram !

    427092


    which resistor are you thinking of changing or adding ?
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    Re: MX3660 with SainSmart Relay

    the MX3660 manual has very little details but the MX4660 manual has a diagram with limited details with some errors !

    The 1K resistor shown in series with the transistor collector is too high a...
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    Re: home switch on stb4100

    Once mach3 is setup and sending a PWM signal to the DAC (digital to analogue converter)

    you should see the 0 to 10V control voltage between the DAC and COM terminals

    427076

    I have not...
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    Re: MX3660 with SainSmart Relay

    if you connect it this way

    the SSR is switched on when the MX3660 output NPN transistor switches on

    427042

    John

    PS
    connection to a SSR-40
  23. Replies
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    Re: home switch on stb4100

    thank you
    as long as you have your machine working

    this is what you should have when the proximity sensor is connected to a stb4100 input

    427040

    without your measurements I could not...
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    Re: home switch on stb4100

    yes, this time

    with other breakout boards or motion controllers designed to work at 5V logic levels it could of been different


    without any detailed information thats why I wanted to...
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    Re: home switch on stb4100

    That will indicate the stb4100 input terminal is connected to the +24V via a resistor and the LED inside the opti-isolator as in the last photo in post 2


    most of the missing 2V will be the...
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