Little Machine Shop HiTorque 3990

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Summary

Specifications

Safety Considerations

General Safety

Fundamental safety rules and common sense practices for operating machinery.

Milling Machine Safety

Specific hazards and precautions for operating milling machines safely.

Electrical Safety

Guidelines for safe handling and use of electrical power and components.

Machine Safety

Mounting Your Mill

Operating Controls

Motor Controls

6450 Controls

Using the Motor Controls

X-Axis Hand Wheel

X-Axis Lock Lever

Y-Axis Hand Wheel

Y-Axis Lock Lever

Z-Axis Coarse Feed Handles

Z-Axis Fine Feed Knob

Z-Axis Lock Lever

Bluetooth DRO (Models 4190 & 6450)

To pair the devices

To configure the app

Using the app

Axis detail settings

Absolute vs incremental coordinates

Starting a work piece

Centering a work piece

Using a different tablet as a display device

Installing the DRO app

Adjustments

X-Axis Gib

Y-Axis Gib

Z-Axis Gib

Tramming the Mill

To tram the mill

Lubrication

Maintenance

Changing Spindle Tools

To remove a tool from the spindle (Model 3990)

To install a tool into the spindle

To remove a tool from the spindle (Models 4190 & 6450)

Squaring a Vise

To square a vise on the table

Detailed steps for aligning the vise accurately on the mill table.

Finding the Edge of a Workpiece

To find the left edge of a workpiece

Specific method using an edge finder to locate workpiece edges.

Drilling

Milling

Conventional Milling Versus Climb Milling

Plunge Milling

Milling Slots

Surfacing

End Mills

Work Holding

Setup Tools

Wiring Diagrams

Models 3990;4190 (SX2 LF)

Electrical schematics specific to the 3990 and 4190 mini mill models.

Model 6450 (SX20)