Hey Joergen,
Ah okay. That does somehow not really surprise me 
When you think of estop button on Original series 
I remember
Thanks for the detailed information!
Hi,
Your user name of “dumbo” needs to change based on your knowledge!
Fun with failure modes. Using ESTOP2 looks great as long as there is no way for the other usages to feed any voltage back into ESTOP2 and effectively disable the estop button. Probably too deep here for a stepper estop…
I’ll try an opto MOSFET circuit driven from estop2 unless someone has a better/standard approach. An estop2 driven opto avoids having to know the existing load on ES. I measured the ES as 1.7V which is lower than the masso doc spec.
Hey all,
If I would buy an Onefinity Elite Series (what I don’t plan to do ), I would probably continue the tradition, and just like on the Original Series, throw away the existing Estop wiring of the manufacturer and put a consistently serious Emergency Stop Circuit to the entire setup.
– Source: STEPPERONLINE Digital Stepper Drive User Manual DM542T(V4.0) (PDF)
you put 4.5 – 24 V on ENA± and it’s disabled. Should be easy to implement.
Yes the one with no arrow is the unallocated one, and it’s fair to assume it was intended for another connection to be released at a later date. It also doesn’t matter which one you plug in where (on the black box), as long as the connection fits
The white arrow is connected with the “a” cable
Hey Chris,
thank you for the information!
So obviously these stepper power sockets stay on when estop is pressed. It’s just the router and vac that are attached to a relay in the black box. So while you @Jd22 could take the power from this connector to supply the additional stepper driver, you will have to wire some Estop to ENA± logic to achieve that pressing estop disables it the same way the stock steppers are disabled.
Okay now I understand, thank you to all!
What are the pros/cons of adding a diode to the estop.2 wiring that goes to the masso steppers?
The idea being it would prevent back feeding voltage from the long external wire runs should they short to power. If they short to power w/o the diode the estop would not function.
Too low of a probability to worry about?
Would the diode break anything?
The Elite does not use a relay for E-Stop. It draws power straight off of the E-Stop pin and feeds that to a fan-out to each stepper motor with a resistor in inside the stepper housing between the E-Stop and the Enable pin on the motor.
I’m not sure why they didn’t do it per Masso documentation.
The black two-pin terminal seems to contain the resistor.
As a follow up:
I added a diode between the internal estop.2 and the external estop2 wires. Works ok with a simple test. The diode keeps an external short of the wires from blocking the estop operation.
Also added a PC817 opto isolator inside the touch enclosure to invert the enable signal for the external driver. I guessed on the output resistors but seems to work ok. The rotary stepper motor now dis-engages with the estop.
I used the Carbide Create pcb kit to mill the pcb. Worked well.