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In my post “How Does Calculating Your Own Alignment Targets Work?”, I discussed using a hot check to determine proper alignment targets. Thermal growth is not rocket science. However, it is often misunderstood. I see people causing harm by compensating for thermal growth incorrectly.
If we assume that the blower expands evenly and therefore set the motor high, we could be going in exactly the wrong direction.
Let’s take another look:
The temperature change across the blower is not uniform. The discharge end of the blower will expand more than the suction end. In my next post I will plot out the actual movement and the right compensation.
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