Boxford 165 HMC

[JAZZCNC]

Thanks for response jazzcnc, I am struggling to get the spindle wiring done i don't understand the 3 small relays apart from one of them is for the splash guards and one for the spindle forward then the relay on its own next to the spindle drive is the reversing relay.
the large contractor seems to be for system enable?? As when I power on and press a green button it then makes.

The White Relay next to Speed controller is a Push Pull relay or Latching Relay. It has two coils A & B which latch it in either position so when power is removed the contacts stay latched in that position, in your case FOR or REV.
If you lift the clear flap on the top you'll see a little red switch this allows you to change one set of contacts from NO or NC. IE: A coil controls NO and B-NC and vise versa.
The smaller relay is used to switch these coils depending on Direction and is what you would control with M3/M4 using the Outputs from CSlabs.

Word of warning regards Cslabs Analog speed Output. Check out if the Lenze speed Ref input is isolated because if not then it will damage the Cslabs controller.
If not then you need an isolation circuit or provide a Speed Ref voltage from an Isolated source. Despite the Cslabs manual reading and actually saying it's Outputs are Isolated I know 100% the Analog Speed Ref Output isn't and if the Lenze is at Mains potential then it will fry the Cslabs unit.