N0VUSUN and Mitsubishi-D700-SC

[JAZZCNC]

I'll shut-up now, Jazz is giving clear instruction and it helps no-one for me to talk over the top of another.

No don't Doddy you have actual experience with this controller and more experience than me with electronics so your the perfect man to help him. Crack on and I'll just dip in if I see something that gets missed.

Edit: Perfect example I also missed the pulling up not down in the VFD manual which proves "you-the-man" . .

[Daveo]

Nvem S-Axis out1 Orange and White twisted pr goes to STF on the VFD..... through relay
Nvem S-Axis out2 Green and White twisted pr goes to STR on the VFD.......through relay
S-axis /Gnd1 goes to terminal 5 on Vfd which is Analog Gdn
S-axis/VSO goes to terminal 2 on VFD which is 0-10V.

So do i keep the above connections but with the addition of a relay,
i have these relays that came with a box of parts i ordered.

[Doddy]

From the manual...



The outputs are opto-coupled, max 50mA. But that "max" is the maximum capability of the opto's transistor, not a guarantee of switching current (this might, probably will, be less).

I've googled the coil resistance of the MY4N-J and not getting anything sensible, similar OMRON power relays, 24V are around 650R so we can guess a switching current for reliable operation around 50mA. Whether you get that out of the NVEM will need you to experiment but I wouldn't bet the house on it working. If not, you'll need a current amplifier (a simple NPN transistor would do).

And you'd need to protect against the back-EMF from the relay, regardless.

If that makes sense then I won't bother with a diagram, but if a diag would help then let me know.

Mike

[JAZZCNC]

I use these Omron MY4N-J and they typically pull about 36ma. Dave if you have a meter that can read current then test on the bench to be safe.