Operating Instructions_VF335_en.pdf - 第249页
6|Function description The power control results from Wave power, Gradient and Offset! Gradient Offset Wave power 30000 Control Pump Pump Control Soldering nozzle Soldering nozzle (B) (A) Fig.65: Pump power control: T…
6|Function description
100% wave power
In a 100% wave power, the solder wave may be noisy, but not tilt to one side. With
small nozzles (up to an outer diameter of about 10 mm), the solder wave forms a
dome. The wave moves horizontally and vertically.
Ersa GmbH Operating Instructions_VF335_en|Rev. 14|30/11/2017 248/695
6|Function description
The power control results from Wave power, Gradient and Offset!
Gradient
Offset
Wave power
30000
Control
Pump
Pump
Control
Soldering nozzle
Soldering nozzle
(B)
(A)
Fig.65: Pump power control: The relationship between Wave power, Gradient and Offset.
For an optimal soldering result, different nozzles must be also operated with different con-
trol power. The black characteristic curve shows the course of the control power for nozzle
(A); the grey curve shows the course of the control power for nozzle (B).
The relationship between Wave power, Gradient and Offset can be graphically illus-
trated as shown here. Offset is the value that is required to leave the solder lying
about 4 mm below the nozzle edge with a wave power of 1%. In this case, the con-
trol power is purely a numerical value can be calculated with the following formula:
Control power = Offset + (Wave power * Gradient)
Ersa GmbH Operating Instructions_VF335_en|Rev. 14|30/11/2017 249/695
6|Function description
The offset value has also the largest control power portion for the solder pump.
The remaining portion of control power is derived from the product of wave power
and gradient.
The Gradient determines by how much the control power increases with a minimal
change in the Wave power.
Note: For different nozzles, also different gradients must be determined. The result
is that, for different nozzles, there are other control power curves!
Ersa GmbH Operating Instructions_VF335_en|Rev. 14|30/11/2017 250/695