Vertical Machining Center
In 2013, PGI added a new Vertical Machining Center – a Johnford Vertical with a travel capacity of 110” on the X axis, 162″ on the Y axis, and 42” on the Z axis. This double column machining center has the following features:
- Extra large milling head with rigid box ways. The head is held by 32.5″ (825mm) of the saddle.
- Automatic tool changer with 60 tools. The tool change time is 4 seconds or less.
- The distance between the standard box ways used on the Y axis is 25.6″ (650mm) and the distance between the optional roller-type linear ways is 34.5″ (880mm).
- Large diameter ballscrews, 2.5″ (63mm) in the Y axis and 2″ (50mm) in the Z axis. In the X axis, 2.8″ (70mm).
- Heavy duty rigid roller-type linear ways are used ont eh X axis for speed and precision.
- Massive one piece base castings. All major machine components are made from high quality meehanite cast iron.
- Huge saddle is 31.5″ x 37.9″ (800 x 962 mm)
- 7 kW servo motor is used on Y axis and 6 kW servo motor is used on X axis with 2:1 gear reduction drives for the most axis thrust available.
- 26 kW spindle motor with 2 speed gearbox and 6000 rpm standard.
- Spindle oil cooler is included.
- High rigidity colums casting for maximum reliability.
What is a Vertical Machining Center?
A Vertical Machining Center is a CNC milling machine with a spindle mounted on the Z axis, which provides the ability to move vertically. This extra axis permits their use in a variety of complex workpieces and significantly improves milling precision without impacting the speed, providing a cost-efficient alternative to most flat-surface hand-engraving work.
The most advanced CNC milling-machines, the multiaxis machine, add two more axes in addition to the three normal axes (XYZ). When all of these axes are used in conjunction with each other, complicated geometries, even organic geometries such as a human head, can be made with relative ease with these machines.
|Linear Axis||Rotational Axis|
|X||A (about A line, parallel to X)|
|Y||B (about A line, parallel to Y)|
|Z||C (about A line, parallel to Z)|