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IndustryArena Forum > CNC Electronics > Leadshine > MX3660 with SainSmart Relay
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  1. #25

    Re: MX3660 with SainSmart Relay

    The SSR switches on/off, though sometimes gets caught in the unknown state, meaning the LED light in this video sort of flickers unpleasantly. I tried to catch it in the unknown state, of course it doesn't do it when the camera is on.

    In the video I'm toggling Flood in mach3.

    https://youtu.be/sjDd0g25Hrc

    From the first video, note that output 3- on the MX3660 is connected to input 2 on the relay board (output 3+ is not connect to 5v+, only Output 3- is connected to input 2, this is visible at the end of the first video). The input 2 LED is lighting on the relay board despite the Output 3 pins being turned off in Mach3.

    I haven't had time yet this evening to try the resistor between the ground and the input. My wife is ill, but once i get my 3 year old to bed I'll try to get out there.

    I doubt a ground loop is an issue, I don't have any steppers or accessories connected as I am bench testing, also, my system was dead reliable before. I've added this SSR board, and the additional BOB (nothing is connected to it). But changes being changes, I suppose it's possible.

  2. #26

    Re: MX3660 with SainSmart Relay

    Wrong post.

  3. #27

    Re: MX3660 with SainSmart Relay

    I get 0V (off) and 5V (on) across the 1k5 resistor. This solves the dimly lit LED issue when off.

    The multiple output issue is persistent.

  4. #28
    Registered
    Join Date
    Mar 2007
    Posts
    1979

    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


    next questions

    how have you configured the C10 jumpers ?


    how have you connected the C10 BOB to the MX3660 ?

    there must be a conflict between the C10 and MX3660

    the C10 BOB is unusual in using pin 18 to detect the printer cable is connected

    PS
    ignore the second question I was thinking of the MX4660's second port

    you can still try disconnecting the C10 to see if every thing works when you go back to the original set up

    PPS
    are you using 2 PC parallel printer ports , a motion controller such as warp 9 's Ethernet Smooth Stepper that emulaters 3 printerports or a uc300eth ?


    John

  5. #29

    Re: MX3660 with SainSmart Relay

    The C10 is connected to the UC300eth-5lpt.

    The behavior of the MX3660 outputs are consistent with the C10 removed or plugged in.

    I have not even attempted to configure the C10 jumpers, I've been preoccupied with these MX3660 outputs. I'd like to be able to control a few items before I start worrying about the additional inputs that I needed the C10 for.

  6. #30
    Registered
    Join Date
    Mar 2007
    Posts
    1979

    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 the SSR

    a simple RC snubber is just a resistor connected in series with a capacitor
    that is connected across the SSR's triac

    Attachment 427182

    others have a MOV added like this

    ssr snubber network with a 220R resistor , 0.1uF capacitor and a MOV (metal-oxide varistor )
    to clamp excessive transient voltages MOVs go form high resistance to low resistance

    Click image for larger version. 

Name:	ssr snubber network 220R 0.1uF MOV.jpg 
Views:	0 
Size:	27.4 KB 
ID:	427194

    the SSR may not work correctly with some LED lights depending on the ballast used
    or inductive loads

    John

    PS

    this youtube video shows whats inside an ebay 25A Solid State Relay
    that has snubber built in
    https://www.youtube.com/watch?v=DxEhxjvifyY
    the circuit diagram is at 4:37

    PPS
    another snubber from amazon (very like the one from ebay found earlier )
    Attachment 427200

    https://www.amazon.co.uk/gp/product/...26M8PYNT1YRNT7

  7. #31

    Re: MX3660 with SainSmart Relay

    I think the hand writing is on the wall here. I need to buy the Fotek units. Continuing to mess with this relay board simply doesn't make any sense.

    I certainly appreciate everybody's contribution here. It's been a real learning experience.

    Once I get the new units and some time to tinker I'll update this thread.

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