Middle HM-27 Manuel d'instructions télécharger pdf (Page 24)

Rotary Microtome HM 355 S

MICROM International GmbH

Robert-Bosch-Str. 49

D- 69190 Walldorf

2-6 MOTORIZED CUTTING DRIVE

Sectioning can be carried out either manually by

turning the handwheel or by means of a motorized

cutting drive. The cutting movement can either be

released by pressing the button START/STOP (fig.

5.12) or by means of the foot pedal.

The controlled cutting speed can be set

continuously from 0 - 430 mm/s on the control knob

(fig. 4.4). The cutting speed refers to the cutting

window. For the upward return travel a

proportionally higher retraction speed is carried out.

To adjust the cutting window in relation to a

specimen, it can be set continuously within the

maximum values.

NOTE! The motorized cutting drive can only be

started, when the functions <handwheel brake>

(fig. 5.10) and <emergency stop> are not activated.

2-6-1 SETTING CUTTING WINDOW

Turn the handwheel so that the lower edge of the

specimen is positioned slightly above the knife

edge. Briefly press the button (fig. 5.8) to set the

upper limit of the cutting window.

Continue turning the handwheel clockwise to place

the upper edge of the specimen just below the knife

edge. Briefly press the button (fig. 5.8) to set the

lower limit of the cutting window. The green LED

in button (fig. 5.8) shows the length of the cutting

window during each further passing through of the

cutting window zone. A cutting window should only

be set while the specimen is moved downwards.

If, by mistake, a cutting window limit is set during

return travel of the specimen, the set limits are

applied to the cutting movement accordingly.

2-6-2 SELECTION OF OPERATING

MODES

For the motorized cutting movement of the

microtome, the following operating modes are

available:

- interval stroke

- single stroke

- multi stroke

- continuous stroke

If the cutting drive is turned off, choose one of the

above-mentioned operating modes by pressing the

button MODE 1,2,3 (fig. 5.11) one, two or three

times. The selected operating mode (fig. 5.6) is

shown on the display (fig. 5.7) on the operating

panel. In the third line on the left side of the display,

the term INTER, SINGL, MUL xxx or CONT. is

shown.

To start the cutting movement, either use the foot

pedal (fig. 6) or press the button START/STOP

(fig. 5.12) on the operating panel. During the

motorized cutting movement, the green LED in

button (fig. 5.12) lights up.

INTERVAL STROKE

Press button (fig. 5.11) until the operating mode

interval stroke (fig. 5.6) is shown on the display

(fig. 5.7).

Now a gradual approach between specimen and

cutting edge is possible. The cutting drive only

moves as long as the button (fig. 5.12) or the foot

pedal is pressed.

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Middle HM-27 Manuel d'instructions Page 24

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