if you connect it this way
the SSR is switched on when the MX3660 output NPN transistor switches on
Attachment 427042
John
PS
connection to a SSR-40
Attachment 427044
Printable View
if you connect it this way
the SSR is switched on when the MX3660 output NPN transistor switches on
Attachment 427042
John
PS
connection to a SSR-40
Attachment 427044
This diagram in their hardware manual version 1.2 shows both of my above connection methods. Output 3 and 4 are driving relays as active low devices and output 1 and 2 are driven as active high devices.
https://www.cnczone.com/forums/attac...d=427046&stc=1
That achieved the same results as connecting V+ to Output 1-, and linking Output 1+ to Input 1.
Output 1 and 2 turn on simultaneously, despite me having Output 2 turned off in ports and pins. I've turned off all the other outputs just to be sure I've not got something crossed up in ports and pins.
If I connect only Output 1, I get stuck between states occasionally, resulting in a flickering light that's connected to the relay. This condition is reduced by connecting the wires for Output 2, but nothing is connected to the relay on output 2. The LED's on relay board are lit faintly all the time, they get bright solid when activated, but they are in the middle when I'm stuck between states. I can try to grab a video if that helps. I'll note, I don't even have 5v+ connected to Output 2+, only a lead from Output 2- to Input 2, yet Input 2 continues to work.
I'm wondering if my MX3660 isn't damaged in some way?
Just for fun I moved my wire (the one that connects to the relay input) from Output 2- over to Output 3-. Same result, the LED on the relay board lights faintly before activating the port/pin. When activating the port/pin for Output 1, sure enough, Output 3 lights the LED on the relay board.
It seems the 5v applied at Output1+ carries down through all the outputs. I've not connected them externally.
Also, John-100, I came across a previous post where you commented heavily regarding the MX3660 and I basically followed your guides there. This was from a few years ago. That's where I got the idea to buy the Tinawood units, but also where I decided to wire this unit basically as you and maxspongbob have suggested. Seems like I could have avoided this issue had I just bought those Tinawood units.
That said, I appreciate everybody's input on this! It means a lot to have a community of willing participants for this!
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 resistance !
if the board is as shown with no protection from reverse polarity connection of the outputs
the opto-isolator could easily be damaged
Attachment 427080
John
Thanks, I'll give it a shot with something like .7k, maybe .5k.
is this the sainsmart 8x SSR relay board you are using ?
Attachment 427090
I have found a readable PDF circuit diagram !
Attachment 427092
which resistor are you thinking of changing or adding ?
the 1K resistor I am questioning is inside of the MX3660
its OK when your using a relay with a transistor amplifier / switch - like the SainSmart Relay board
but could be a problem if you directly connect a relay coil to the MX3660 output
depending on the supply voltage and coil resistance
only a week ago
I worked on a AXBB that had a faulty FET
AXBB charge pump fault - Page 4
not having a AXBB it was an iterative process in remotely finding the faulty component - photo in post 22 being the key
so the MX3660 is not the only stepper driver / breakout board that can have a problem
John
I totally misinterpreted the drawing. I really need to take a class on fundamentals of this stuff.
I recently installed a C10 BOB as I needed additional inputs for encoder and some proximity sensors. Perhaps using the outputs on that would be more productive than fighting the MX3660. Or perhaps I just should buy the other solenoids?
I may try wiring as per Maxspongebob’s drawing earlier in the thread. If I could at least get a consistent state on the relay that would be nice. Eventually I will be adding a few pneumatic actuators as well. Getting a drawbar or tool changer stuck in flux would probably be a bad time.
Here’s a video.
Note how the LED’s lit dimly despite being in an off state on the controller, then when the pin is activated they turn on fully. Also, sorry for the shaky video, I was recording and trying to touch my touchscreen on the controller.
https://m.youtube.com/watch?v=FSOAfS...ature=youtu.be
I have had a look at the video and see the LEDs are dimm when they should be off
Attachment 427110
whats the voltage between the SSR board input and common ground when it should be off ?
it could be either the MX3660 output is leaky
or possibly a earth loop is causing currents to flow along the SSR ground wire
and the resulting volt drop is just enough to switch on the LEDs to just start to light
do the solid state relays switch on ?
looking for information for the SSR board I found this -
Input control signal voltage:
0V - 0.5V Low stage (SSR is OFF),
0.5V - 2.5V (unknown state).
2.5V - 20V High state (SSR is ON).
John
if you have connected the MX3660 output between the +5V supply and the SSR input like this
Attachment 427118
try adding a 1K5 resistor between the relay boards ground and input
then measure the voltage across the resistor both when the relay is on and when its off
the voltage across the added 1K5 resistor will indicate the resistance of resistor shown in the MX3660 manual
if it is 1K as shown in the manual
when switched on
the voltage across the added 1K5 resistor will be about 3V ( depending on the loss acros the opto-isolators transistor )
John
PS
without adding the 1K5 resistor between the SSR board input and GND
the transistor relay driver could sensitive enough to be picking up stray signals that cause the dim light from the LED indicator