Suppressing Temperature Variations When Using A Temperature Sensor For Packing Machines (For Packing Machines) - Omron E5*D series User Manual

5-1
Suppressing Temperature Variations
When Using a Temperature Sensor
for Packing Machines (for Packing
Machines)
 Overview
The seal quality in packing machines is influenced by the temperature of the seal surface at the hot
plates.
Traditionally, the temperature of hot plates in packing machines is measured a distance from the
seal surface in the hot plates, which makes the measurement easily influenced by the heat from the
heaters and creates a deviation between the measured temperature and the actual temperature of
the seal surface.
* The actual seal surface temperature is essentially the same as the surface temperature of the heating plate.
Measurement point for
Temperature Sensors for Packing Machines
Temperature Sensor
for Packing Machines
Heaters
Traditional measurement point
for Temperature Sensors
To solve this problem, OMRON provides Temperature Sensors for Packing Machines* and
automatic filter adjustment to measure the surface temperature of the hot plate. If you use our
Temperature Sensors for Packing Machines, you can measure the actual temperature of the seal
surface. However, heat is taken from the packing materials, so periodic temperature variations can
occur. If you also use the automatic filter adjustment function of the E5D, you can automatically
suppress these temperature fluctuations.
This lets you use the Temperature Sensors for Packing Machines together with automatic filter
adjustment to control quality with the actual seal surface temperature while also suppressing
temperature variations automatically without workers performing adjustments. You can also use
automatic filter adjustment to suppress temperature variations for periodic disturbances even when
using traditional temperature sensors.
* Refer to 2-3 Installing Temperature Sensors for Packing Machines.
We recommend that you use automatic filter adjustment in the following cases.
• If temperature variation occurs when Temperature Sensors for Packing Machines are used
even if AT is performed
E5@D Digital Temperature Controllers User's Manual (H224)
Hot plate
Actual seal surface
5 Advanced Operations
Packing material
(The above figure shows a cross-section.)
5
5 - 3