Thermal Safety Circuit - Stratasys FORTUS 360mc Service Manual

5.
Oven temperature is compared to the set-point temperature of the chosen material.
• If oven temperature is below the set-point temperature, the heaters are
• If oven temperature is at the set-point temperature, the heaters are turned
• The heaters are constantly cycled 'on' and 'off 'to maintain a constant
6.
Heaters are controlled with a Pulse Width Modulated (PWM) mode of operation for
accurate and efficient temperature control.
• When the heaters are 'on', voltage is applied in cycles to the heater

Thermal Safety Circuit

Purpose
Automatically shuts down the system if it detects high heat conditions at the upper gantry or
oven. The thermal safety circuit is 24V DC.
Components (Figure
1.
Upper Gantry Thermal Fuse:
• Thermally activated fuse is mounted in the back of the gantry.
2.
Oven Thermal Breaker:
• Thermally activated breaker mounted on the outside of the oven. (The
3.
AC board:
• Monitors state of thermal safety circuit.
4.
MIO Board:
• Interfaces with thermal safety devices and AC board.
FORTUS 360mc/400mc Service Manual
turned 'on'.
'off'.
temperature.
elements.
2-8)
probe is mounted inside the heater compartment above the heaters.)
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