This project involved attaching a retrofit angular positioning system to a 2nd hand 3 metre diameter drilling table. The original table was rotated by an eleectrically driven spur gear under the table. Over years this system hadworn prouducing unacceptable backlash and consequent inaccuracy.

Ritech Systems bonded a timing belt to the outside diameter of the table. This timing belt was driven by another double sided belt housed within a tractor drive attachment and controlled by a powerful servo motor.

This tractor drive system has been designed so that it can be scaled up or down to suit a number of different applications.
 
Original table
 
table1
 
 

A ring was machined and welded in place, then the timing belt was fitted and fixed in place.

 
rotary2
  rotary3
 
 
Bench testing the tractor drive
 
rotary4
 
 
A hydraulic brake locks the table once in position (the drill sizes can be as high at 40mm on a 2.5m PCD)
 
rotary5
 
rorary6
 
The completed drive in place on the machine
 
 
Control system
 
rotary9
  rotary10