Demo Description:

Use the following test kit and procedure to determine the root cause of the mill chatter.

Perform all troubleshooting listed in the Mill chatter troubleshooting guide.

MILL Chatter Troubleshooting

In addition to the inspections listed, perform the following:

• Spindle deflection test
• Level inspection
• VMC Inspection Report - EA0006
• Check the Drawbar Force
• Spindle vibration test
• Advanced Tool Management

After checking the above and if the chatter continues, gather the tools and parts listed below and run the Mill Chatter test cut program. This is a proven program and can be used on the following mill machines:

• VF-1 to VF-14
• DM
• Mini Mill
• Super Mini Mill
• TM

Machine Requirements:

• Latest Released Software Version
• Properly milled jaws

Part Program:

O00011.nc

Tool Number 1:

Cutter Type: ½” End Mill 3 Flute with .030" Radius

Holder Type: ER Collet

RPM: 10,000

Number of  Flutes: 3

Minimum Working Length: 1.75"

Tool Number 2:

Cutter Type: ” ¾” Chamfer Tool

Holder Type: Weldon or ER Collet

RPM: 10,000

Number of  Flutes: 1

Minimum Working Length: 2.50"

A vise must grip the stock 0.150"-0.200”. The outside profile is .500” deep so 0.200” is the max.

Set G54 Offsets:

• Set tool length offsets off top of material
• Set G54 X0 Y0 to center of material
• Set G54 Z = Zero

Run the Mill Chatter test program.

• Inspect the finished part, look for chatter and coining.
• If no chatter or coining found, then the machine performs as intended.
• If chatter or coining is found, generate an error report, pictures and send along with machined part to the factory.

Test Cut part with Chatter[1].

Test Cut part with Coining[2].