Horizontal and Vertical Lift Table Milling Machine Technology Parameters
Milling machines have been an essential tool in the world of machining and fabrication throughout the ages. With advances in technology, and recent developments in precision machining and CNC (computer-controlled) milling, these machines have become ever more important. And today, milling machines with lift tables have become increasingly popular.
The first thing a potential buyer needs to understand when considering a horizontal or vertical lift table milling machine is its basic design. This type of machine consists of a table that can be moved up and down along a vertical column, known as the Z-axis. On the same column or tower is a spindle that rotates the cutting tools and can be oriented at any angle, known as the C-axis. These are usually driven by stepper motors.
Now, let’s look at the technology parameters for horizontal and vertical milling machines with lift tables.
Table Size: Table sizes vary widely between machines. Horizontal lift table machines typically feature vertical tables that range from 24” X 48” up to 30” X 60”. Vertical lift tables on horizontal machines generally range from 34” X 32” up to 36” X 60”.
Maximum Table Load: The maximum table load of a lift table milling machine is a function of its design. Horizontal machines usually range from 1,100 pounds up to 1,800 pounds. Vertical table machines usually range from 2,400 pounds up to 4,000 pounds.
Maximum Spindle Speed: Depending on the type and size of the spindle, the maximum speed of a lift table milling machine varies from 3,000 rpm up to 8,000 rpm.
Feed Rate: The feed rate is the measure of how quickly a milling machine can move its spindle along a given axis. Generally, feed rates range between 10 in/min up to 50 in/min, and can be adjusted depending on the part material, size, and complexity.
Minimum Tool Size: Different machines are capable of working with different sizes of tooling. A minimum tool size of 0.005” is a common range.
RIQ: RIQ, or Repeatability Index Quality, is a measure of the milling machine’s ability to repeat the same motion on subsequent parts. This is critical for consistency in production and output. RIQ values vary from 0.0004” up to 0.001”, depending on the type of machine and its construction.
Separation Motors: Most milling machines with lift tables use separation motors to separate the cutter path from the tool path. This allows for better accuracy, improved part finish quality, and better tool life.
In addition to understanding the basic technology parameters for horizontal and vertical lift table milling machines, it is also important to consider the other features offered by the machine. Look for any additional automated features, such as probing, automatic tool changes, and feed rate adjustment. Also, make sure to consider user interface options, like manual or CNC (computer numerical control), as well as any safety features the machine might have. If you understand the technology and features offered by a horizontal or vertical lift table milling machine, you can make an informed decision and find the right machine for your needs.
