UCCNC with UB1 Sanity Check

[AndyUK]

Hi Ian,

Couple of things I've noticed;

1. Why does X103 connect straight to the input +24V pin? This means the UB1 board won't have any power.
2. Looks like you intend to solder bridge X103-X110 to the safety circuit if that note is anything to go by, but you haven't connected anything to OSSD so the safety circuit won't be doing anything.
3. If you are using the safety circuit, use a momentary switch with the OVR pin to override it when needed. I've hooked my OSSD pin to the enable line on the drives, so that if the VFD faults or any of the drivers fault, the motor drivers are disabled. Its also a second layer on the estop - if the UB1 thinks there is an estop condition the drives are disabled, even if the contactor has somehow not released to de-power them.
4. NPN proximity switches (if you're using the inductive type at least) are usually 3 pin, not two. You'll probably need an extra +24V line to them.
5. Looks like a Huanyang VFD? If so the manual says don't turn on and off with a contactor.
6. Recommend taking a line from the VFD's FA/FB/FC relay to X103-X115 for a fault signal.
7. Whats the plan with the DC-to-DC converter? The UB1 is capable of sending the speed control signal to the VFD without it - it loses a little at the top end, but that can be compensated by just running the VFD with a 0-10V input and configuring UCCNC to output 24,000 RPM = 10V.
8. E-Stop looks interesting. Looks like you're trying to use Relay 3 as a way for the UB1 to trigger a software e-Stop? Might want a no-volt relay in here so that when you lose power and regain again you don't go shooting off with random code - or is that what the momentary switch is for in parallel?
9. I've really liked using the tamper-proof style LED switches, using the Y outputs to signal when the LED lights up which gives a nice idea about software state (e.g. my limit override button lights up yellow when the machine is at a limit).

If it helps, my UB1 diagram is post #73 on this page. Its pretty up to date and would work 95% - I've made a couple of minor changes since but nothing major.