Weird bahavior between controller and 110 volt 2,2 kw Huanyang Spindle

[Aiph5u (Aiph5u (not affiliated with Onefinity))]

Hey MstrODstr,

besides a faulty VFD, it could be an EMI issue. This is supported by the fact that when the spindle is off, the Modbus communication goes. The spindle and the VFD are a both a heavy source of EMI, it is important that all cables are shielded and their shielded ends are terminated correctly.

Does your X carriage go to the home position at the end of the program, i.e. does it approach the CNC Controller or the VFD? Could you check if the issue appears when the spindle approaches them, and disappears when the spindle is in the right rear corner (assuming that CNC Controller and VFD are on the front left of the machine)? If so,

@Aiph5u

@Aiph5u

in the first one would place the ferrite cores

on all cables, best at both ends.

Do you also have the monitor intermittent issue?

@Aiph5u

@Aiph5u

Snap-on Ferrite cores for cables

– Source: Unconventional2, CC BY-SA 4.0, via Wikimedia Commons

If the problem persists, you should be aware that…

@Aiph5u

a VFD and especially its output cable, the cable to the three-phase spindle, are heavy sources of EMI. Therefore it is required to use shielded cables, also a VFD is intended to be installed into an earthed electrical cabinet. Both should be indicated in your VFD manual, including which wires to use, on a page that should look like shown here . As you can see there,

• for the signal cables like used for ModBus communication, you should use shielded, twisted pair cable.
• On the output of the VFD, i.e. the spindle cable, you should use shielded 3+PE for the three-phase spindle, like shown here:

Image 1: A typical spindle cable for use in a power chain (LAPP ÖLFLEX® CLASSIC FD 810 CY )

And finally to not only prevent EMI but also to comply EN/IEC 60204-1 safety standard, the machine should be electrically bonded and grounded,

• as described here ←