Does the barrel of the connector on the spindle (center top of the spindle in your picture) have conductivity to the metal case of the spindle? I'd bet it does so you could use a shielded cable from your VFD to get a ground connection. If you don't have a shielded cable, you might be able to get a ring terminal that goes over the the top of the barrel and use that for a ground wire run back to the VFD. They make them with up to 3/4" ID rings.
Grounding a Chinese spindle
I am at the point in my homebuilt CNC project where I am preparing to wire the Chinese spindle, watched a number of videos concerning the lack of ground connection. All the spindles I have seen in the videos had 4 small screws holding the male connector to the top of the spindle. Of course mine does not use the plate with 4 screws. I have removed the 4 screw around the top section of my spindle and have tried to twist that section in either direction to get access to the internal wiring. Have not used force as I do not want to do damage.
Any suggestions as how to get to the wiring would be appreciated?
Any suggestions as how to get to the wiring would be appreciated?
Attachments
1 - 11 of 11 Posts
You have to separate it at the black phenolic piece and the body of the spindle, Gary. It may be a bit tough to break loose but I got mine off by tapping with a wooden mallet. You can see in the photo that there are O-rings and a shoulder. I changed my connector out for an Amphenol with ground and you can see how I ran the ground wire in the photos below.
![Product Machine Auto part Machine tool Cylinder]()
![Machine Machine tool Milling Auto part Toolroom]()
![Product Auto part Gauge Machine Electronics]()
David
David
1 - 11 of 11 Posts
