Leica Biosystems RM2255 - Manual (Page 27)

25 Leica RM2255
When continuous feed is selected, the coarse feed buttons have the same functions
as in trimming mode. The STEP function is useful for careful step-by-step approxi-
mation of the specimen towards the blade.
How to activate the STEP function:
• Switch the instrument on while holding the
button on the control panel.
(Likewise, to deactivate switch the instrument on while pressing the button.)
While the instrument is initializing, hold the button until the software version
number is no longer displayed (ensure that version number 2.1 was displayed).
• Press the TRIM/SECT button and select sectioning mode (LED SECT lit).
• When pressing the button (with an arrow) for slow-speed coarse feed, a
defined, incremental feed takes place (STEP) at the value indicated on the
display in the respective direction (simple step).
• By short activation of the buttons for coarse feed (with two arrows), a single
step is also effected in the appropriate direction.
• Longer activation of the double-arrow coarse feed button effects a repeated
feed motion for as long as the button is pressed.
5. Operation
• To start the rapid backwards movement (away from the blade), press the
key.
After the button is pressed, the specimen head is moved to the rear end
position.
• To stop the movement, press any of the four coarse feed buttons.
• The yellow LED (40) in the button flashes while the specimen head is in mo-
tion, and remains lit continuously when the rear end position is reached .
40
Backwards coarse feed
Multiple
step
backward
Multiple
step
forward
Single
step
backward
Single step
forward
Sectioning mode
Trimming mode
Button functions in STEP
mode
Do not put your fingers between the specimen clamp and micro-
tome to prevent pinching them.
In the trimming mode, the coarse feed buttons operate a continuous
movement as long as the button is held down. The double-arrow
button for rapid coarse feed backward movements has a lock-in
function.
This feature is only available in sectioning mode in version 2.1 or
higher. For software versions older than 2.1, contact Leica Techni-
cal Service.
In sectioning mode the user can select between STEP function
(step-by-step specimen feed) and continuous specimen feed.