|Operations on Smooth Miller and Thicknessing Miller - Course: Mechanical woodworking techniques. Trainees' handbook of lessons (Institut für Berufliche Entwicklung, 10 p.)|
Figure 3 - Construction of the smooth miller
1 column, 2 feeding table, 3 unloading table, 4 cutter spindle, 5 stop bar, 6 handwheel for adjustment of table
The column carries both, machine tables and the cutter spindle with the bearing housings. The column accomodates the electromotor.
The machine tables are vertically adjustable.
The depth of cut is set at the feeding table.
The feeding table is set to the flying circular height of the cutter.
The stop bar is horizontally and angularly adjustable. It serves for guidance when milling narrow faces.
In the cutter spindle the cutters are mounted. Their number of revolutions is between 4,000 and 6,000 revolutions per minute. The drive is done by the electromotor with the help of a belt drive.
Mode of operation of the smooth miller
The cutter spindle is set turning by the electromotor. It planes and finishes the material to be worked by chip removal.
The part of the cutter spindle which is not necessary for milling is covered by a stationary safety device.
The moveable left part of the safety device releases the necessary working width of the cutter spindle.
Smooth millers may cause heavy accidents. Therefore, pay special attention to the following:
- do not switch on the machine without safety devices
- do not operate the machine without instruction
- make use of the feeding device when machining short workpieces (see Figure 5)
- pay attention to the order on the working place.