MTR CNC, Turn-Mill Index Table
Stock#: 60395-SB
Year: New 2006

Specifications:

Table diameter: 16 ft.
Table height: 45”
Table Capacity: 200 Ton
Bearing: Hydrostatic
Track Diameter: 116” Dual Track
Ring Gear Size: 177.3 Pitch Diameter
Gear Rating: 4,500,000 Lb. In.
Table speed: .00015 to .5 RPM
Table traverse: 1 RPM
Table Drive Motors (2): In Anti Backlash Mode
Accuracy: +/- 5 sec

SIEMENS CNC CONTROL AND DRIVES

Siemens 840 D CNC

- MTR has installed a Siemens 840D CNC control. This control is a modular digital 32-bit microprocessor CNC continuous-path control with an integrated, powerful PLC.

- Listed below are additional features included with the standard features.
- Part Program Memory 500KB

Bed

The bed is a large heavy wall meehanite casting fully stress relieved consisting of ribs which tie the extra heavy center post support column to the full depth annular bearing support wall. The bed structure is designed to transfer all table and work loads directly to the foundation without distortion at the bearing area.

To further support the bed and bearing arrangement B W Fixator type leveling devices are used to form the load transfer link between the bed and foundation proper. Fixators are a combination hold down and leveling system which enables bed and table leveling without distortion or structure internal stressing. The hold down feature assures permanent retention of machine position even under severe work conditions. The Fixators are positioned directly under vertical load carrying sections in sufficient numbers to provide uniform load distribution on the foundation well within the stress characteristics of the fixators themselves. Note: Fixators are not included in our price.


Table

The table is a meehanite casting fully stress relieved. The construction consists of pie shaped sections with full depth ribs.

The ribs run radially from the center bearing post section to the circumferential outside rim. A flange extends from the outside table rim inward toward the table center. Along with the table top this construction forms the rigid structure required to properly transfer work loads through the bearings into the bed section. The table top has four (4) pair of machined parallel tee slots 1” wide on 5" centers at 90 degree increments plus (20) radial T slots equally spaced. The underside of the table is machined to accept a labyrinth dust shield to minimize contamination of ring gear and bearing lube oil.

Table Bearings

Arrangement consists of a centerpost with upper thrust bearing to keep table deflection to a minimum and a cylindrical roller bearing with a taper bore. The main thrust bearing is a 116” diameter hydrostatic dual track bearing designed for maximum weight carrying capacity. A lift sensor system is incorporated to insure the table has adequate lift prior to rotation.

The centerpost is provided with a Heidenhain RON 905 encoder for table position feedback to the CNC control.

A remotely located reservoir, pump and motor provide the source for thrust bearing lubrication, center post lubrication and table drive gearing. A new chiller system will be incorporated to control the hydrostatic oil temperature.



Table Drive

Table drive is through a large diameter heat treated alloy steel helical ring gear mounted on the underside of the table. This gear will be designed new to match the power required for cutting a 46’ gear.

The table is driven by carburized, hardened and ground dual helical pinions to mate with the ring gear in an anti-backlash format. The pinions are driven by high efficiency reducers and AC Digital Servo motors

These pinions are mounted to a drive box which is accessible from the outside of the bed.

This machine is listed for sale by Industrial Machine Tool located in Anacortes, Washington