2. Double-header viewing. In this mode each of the two oculars is tilted in opposite
directions so two people can share the same microscope for discussion of the
observations (which can be facilitated by use of the AR HUD pointer).
3. Single viewer binocular vision. This allows a user to use both eyes to make
observations which is more comfortable especially for prolonged observations.
Z-Motor
The focussing mechanism can be
motorised by use of the PUMA
Stage Motorisation module. Use of
a motor to focus the stage is
particularly helpful in reducing the
image ‘wobble’ that is noticeable
when doing manual focussing with
high power objectives.
The stage Z motor is a stepper
motor and must be powered by a
suitable stepper motor driver logic
circuit – it cannot be driven by
simple electrical connection like a continuous DC motor. A suitable stepper driver is the
ULN2003 Darlington pair IC. If you do not want to build your own stepper driver system
then the PUMA Control Console can be used because this contains a ULN2003 stepper
driver module as standard, as well as a friendly user interface with some advanced
motor control functions built in to its Arduino Nano microcontroller.
PUMA Foundation Scope
Page 30 of 40
User’s Manual v1.0