Quote Originally Posted by JAZZCNC View Post
The last picture you showed on the previous post is the VFD ( Variable frequency Drive) this is what controls the spindle. It takes 220-240V 60hz single phase power and converts it to 3 phase variable frequency between 0hz and upto 600hz depending on the rating of the VFD and spindle. Probably 400hz. This gives you the abilty to control the speed of the Spindle.

You can also control the VFD from the CNC controller and have the software turn on/off and set the speed. This does require other hardware called a spindle speed controller which outputs signals to the VFD.
Your control box may or may not have this.? If you supply good quality pictures of inside then we may be able to see if you have one or not.?
Here are the pictures:
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I have already changed the water cooling spindle tubes. About the cooling of the spindle can i use a Computer water cooling system?
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