User guide

TrueFeed manual
17
The maximum voltage that can be applied to the TrueFeed is 30 VDC. The tachometer voltage must be
reduced to 30 VDC. If the tachometer generator has a higher voltage output than 30 VDC at the maximum
extruder output capacity, it must be reduced. See the diagram below.
Rx (kilo-Ohm) = (2,684 x (Max. tacho output VDC – 5)) -66
If the extruder stops when it is connected to the TrueFeed, an isolated signal converter is required. Contact a
Conair representative for more information.
Tachometer function
The tachometer function is only available in Extrusion mode. The feeding rate is required to automatically
adjust to the extruder’s speed. In Tachometer mode, an input voltage is linked to a feed speed setting. If the
extruder speed changes, the tachometer input voltage and speed of the feeding will also change.
A linear correlation between the extruder’s speed (tachometer input signal) and the required TrueFeed speed
is displayed in the graph below.
The tachometer function can be set in the PRODUCTION screen.
The tachometer setting can be adjusted automatically or manually.
Max tachometer: 0.0V
Set tachometer: NO / YES
 Highlighted Parameters are factory settings.
Input
connection
Resistor (Rx)
Green wire +
Tachometer
generator
EXTRUDER
Yellow wire -
13
12
Tachometer input voltage (VDC)
S
p
eed
(
RPM
)
Tachometer graph
(Example)