Centroid Community CNC Support Forum

The PLC program can invert the state of an input, so that a closed input appears open and vice versa. The basic GPIO4D PLC program assumes that INP10 is the spindle drive fault input. The PLC program looks at bit 1 (value 2) of Machine Parameter 178 to decide whether to invert INP10, in order to sup...

I am pretty sure that any time you update from CNC11 v3.00 rev34 (or earlier) to a reasonably-current version (say, something since last February) you need to also update your PLC program because the jog pendant key mapping was changed. See http://ajaxcnc.com/ajaxbb/viewtopic.php?f=20&t=64 for l...

On a quick glance, I would guess that you need to: 1) Connect pin 19 (S, "normal") of each drive to pin 3 (FLT) of its axis header on the GPIO4D. 2) Connect pin 7 (G, "logic gnd") of each drive to pin 4 (FLTCOM) of its axis header on the GPIO4D. 3) Install a 470-ohm SIP resistor ...

You probably don't need the EMI filter in the 24VAC lines.

You could build your own rectifier to make 110VDC out of 83VAC, but you would be better off buying the unit from Ajax: "Capacitor & Bridge Combo", USD $89.

You can get by without the additional switches. Decide which way you want X and Y to home: usually X-, Y+ (table right, saddle forward). Wire your single switches in as those switches (e.g. wire the X switch as the X- limit, and the Y switch as the Y+ limit. Defeat the other switches at the DC3IOB (...

That is where you hook up the supply of whatever voltage your contactor coils require. For example, if you use reversing contactors that have 24VAC coils, then you would connect 24VAC where the diagram shows "power for reversing contactor coils". If you use contactors that have 120VAC coil...

If I were building it, I would tie the directional enables to the limit switches, so that tripping a limit inhibits drive output in that direction.

I don't know anything specifically about Copley, but this sounds like a typical setup for third-party DC drives (e.g. AMC, Aerotech, etc.): a general ENABLE to allow the drive to operate at all, and directional enables that can be wired through limit switches. Pull-down-to-enable is what you want in...

Auxiliary outputs, such as those on H5, are designed to be 5VDC only. Looking at the open-collector output diagram on page 3 of the DC3IOB manual, you could probably get away with 24V relays powered by an external supply, as long as you connect the minus (0V, COM, ...) side of that supply to the com...

While it is good practice to wire a contactor in the intended direction, with the L terminals on the live side and the T terminals on the load side, functionally it doesn't make any difference. You need to look at several things: 1) Is the contactor actually closing when you release the E-stop butto...