[Khalid]

Hi,
This is first time i am working on CNC retrofit of a Radial Drill Machine. The existing machine is manufactured by Pakistan Machine tool Factory with a working area of 340x 340mm. Presently, the machine is under major retrofit with latest 3-axes CNC Control System. The controller will be able to do 2D and 3D contouring of complex shapes with higher accuracy, less resources and less time.

This retrofit will help us making complex parts for fabrication of 10ft x 10ft CNC Milling machine.
SCREW REPLACEMENT
Currently the Machine has ACME screws at X/Y cross slides. To get optimum accuracy and low-backlash these ACME screws will be replaced with Ball screws.

CUTTING FLUID CONSOLE

For High speed machining cutting fluid is abundantly required on the work piece. New Console was fabricated using in-house facility. The pump will be controlled with the help of computer M-code command.

CROSS-SLIDES

Cleaning of linear ways and minor modifications for ball screw installation is underway.


STEPPER MOTOR PULLYS

The machine will be driven with stepper motor. These stepper motors will be installed on X-Y Cross-slides and Spindle (Z-axis). Stepper motor pulleys with 3:1 reduction has been machined.

SPINDLE OVERHAULING

The spindle of this machine can carry tools up to 13mm diameter. The ranges of the spindle RPM is from 251~ 2560. The spindle is driven with 3-phase 2.2hp motor. Spindle gears and internals are currently being overhauled. One of the roller bearing was replaced due to high noise and clearances. We have minor backlash in the collet-shaft rack-pinion gears However; this backlash may be compensated in the controller software.

I hope you will enjoy the thread and comments...