7
2.4.9 Overload cut-out
To protect the connected motors against thermal destruction, the system
features a separate motor temperature monitoring device. For this
purpose, a temperature module is integrated in the device.
• 1st Level:
As soon as the temperature module indicates a motor temperature
above 75 °C and below 90 °C, an acoustic warning is sounded and the
message “Temp. Motor” flashes on the display. Any further overload
causes control unit
1
to switch to level 2.
• 2nd Level:
As soon as a motor temperature in excess of 90 °C is detected, the
motor is switched off and the message “Error 7 – Motor overheated” is
shown on display
2
.
After a cooling-down period the motor can be activated again.
Alternatively, the temperature module is reset, and work can be continued
as soon as the overheated motor has been replaced. We recommend
keeping a replacement motor on standby.
2.4.10 Coolant pump
Note
The coolant pump only works when a motor is running!
At power-on of the control unit, coolant pump
4
is always deactivated
(even if it had been released for operation at an earlier time).
The microspeed® uni control unit
1
is fitted with a coolant pump
4
. This
coolant pump serves exclusively for cooling or irrigating the tools. The
delivery rate at the highest dose level is approx. 80 ml per minute. The
coolant pump can be activated either in the respective motor control field
or through the appropriate hand or foot control device. The delivery rate
can be selected via the pump control field or through the Device settings
menu, see chapter Submenu Device-specific settings.
Exception: When using pistol handpiece GD684, the pump can be
activated, and the delivery rate can be changed, only via the appropriate
control fields on the control unit.
Any one of 21 dosage settings can be selected. At dosage settings 1 to 5,
coolant pump
4
operates in intermittent mode. The pump can be switched
on and off, and the delivery rate can be changed, even while the motor is
active. Once the motor was active for more than two seconds, a special
drive control prevents further coolant from dripping out.
2.4.11 Motor cable
Note
A motor cable is needed to connect motors (with motor-side plug
connection) GD674, GD676, GD677, GD678 and GD679 to the control unit.
The microspeed® uni motor system comprises one motor cable for foot
control (GD672) and one motor cable with hand control (GD673). Both
motor cables can be used in connection with all motors with a motor-side
plug connection. Either of the two motor cables can be connected at any
of the two motor connection sockets
5
.
Notes
The choice of motor cable depends on the application and which handpiece
is to be used.
For using saws GB128R, GB129, GB130R and motor cable with hand
control GD673, we recommend guiding the saw with both hands for
optimal handling. If single-handed saw guidance is required, use motor
cable GD672 with a foot control device.
WARNING
Risk of injury due to uncontrolled movement of skin
abrading handpiece GB280 in conjunction with a motor
cable with hand control GD673!
¾
Use skin abrading handpiece GB280 only with motor
cable GD672 and foot control.
