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Basic Test Setup – Light Bulb Test
It is fairly easy to test Focus Drives on the bench. One does not have to use a motor to
verify basic operation. When working properly, the Focus basically creates a variable
voltage much like a light dimmer except the output is DC. The easiest way to check a
Focus on the bench without a motor is to connect the Armature output to a resistive
load. One could use a 75 watt light bulb screwed into a light bulb socket base as
shown below.
Basic Test Power Wiring
In order to test the Focus, one would need to setup the input for 115 Vac operation and
for basic Armature Voltage feedback. The drive should also be set for the lowest
current setting. Therefore before testing, one should record the settings before test so
that they could be reset back after the test.
115VAC
Line Input
75 W
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