Spindle Speed Control

[cncJim]

Hi,

I bought my cnc router on ebay and it was in a bit of a state and had no information with it.

I have the machine up and running but I cant seem to control the spindle speed.

The spindle and vfd look to be chinese types and both have no markings on them at all so I have no idea on their ratings!

The spindle always runs at about 22k rpm (as shown on the display of the vfd - it does fluctuate alot between 20k and 23k) and in mach 3 I have no feedback as to the current speed and no matter what I try to set it at it always runs at the same speed.

I have read a number of posts regarding the setup of vfds/spindles/mach 3 but I must confess I dont really get it...

Here is a pic of the current general wiring...



Thanks,

Jim