|Operations on Smooth Miller and Thicknessing Miller - Course: Mechanical woodworking techniques. Trainees' handbook of lessons (Institut für Berufliche Entwicklung, 10 p.)|
Figure 6 - Construction of the thicknessing miller
1 cutter spindle, 2 feeding roller - corrugated roll, 3 feeding roller, 4 machine table, 5 front sliding roller, 6 rear sliding roller, 7 front pressure beam, 8 rear pressure beam, 9 rebound protection
The table is vertically adjustable for setting the intended thickness of the workpiece.
Two sliding rollers are inserted in the table to reduce friction between table and workpiece.
The feeding rollers move the workpiece over the machine table and under the cutter spindle.
The front and rear pressure beam prevent the fluttering of the workpiece when milling.
The rebound protection prevents the workpiece from being thrown out.
In the cutter spindle the cutters are mounted. Their number of revolutions is between 4,000 and 6,000 revolutions per minute. The electromotor drives the cutter spindle and the feeding device.
The closed construction of the thicknessing miller rules out to contact with the cutter spindle.
Concerning accident prevention it should be observed the following:
- The rebound protection is to check for operatability.
- Maximum chip removal is determined by the device for chip thickness limitation (see Figure 6) (depending on the type of the machine).
- Pay attention to the cleanliness of the machine table.
- Workpieces of different thickness should not be inserted at the same time. The thinner workpiece would not be picked up by the draw-in roller (corrugated roll).
- Make use of ear protectors.