Grinder Gap Eliminator
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senses precise motor powerHigh Sensitivity Self Adjusting Grinder Gap Eliminator
The PCR1810 COMPENSATOR motor load control, manufactured by Load Controls Inc, is a very effective unit for increasing the efficiency of grinders. For an automatic grinding cycle, it is desirable to quickly bring the grinding wheel into contact with the work piece without "grinding air" and wasting production time. Since the size of the grinding wheel is always changing, it's hard to predict exactly where the wheel is. The solution is to monitor the spindle power as the wheel advances toward the work piece. An increase in power means that the wheel has touched the work piece. A great advantage of doing this is that the sensor is not located in the work area. To make this work reliably in practice requires 3 important elements: 1)Eliminate the need for adjustment, 2)High sensitivity, 3)Fast response.
The Compensator senses the machine spindle power and has two set points, one is used to control the grinding wheel whilst the other to prevent gross overloads. By measuring motor power rather than just motor amps, the sensitivity is greatly increased. For a lightly loaded motor, there is a 10X improvement in sensitivity over current monitoring systems. The control also has a compensating feature which will zero out the baseline power. The machine baseline power changes significantly as temperatures change, coolant and the lubricant viscosity change and the mechanical clearances change. During each machine cycle when the process is in its baseline or idling position a contact closure is sent to the control from a limit switch (or from a programmable controller) and the control learns this value and retains it in memory during the next machine cycle.
The control then looks for an increase above this baseline value. By zeroing out the inherent machine drift , the control is quite precise. A special filtering scheme is used to insure fast response, it is easy to install since it requires no machine modifications and is a low cost solution.
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Link to: Power Transducers and Load Controls - Complete Product Summary
DOWNLOAD PDF DATA SHEET FILES:
Compensator load control data
sheet PDF file 
Gap eliminator
load control improves grinder efficiency
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VYDAS
- Short Form Product Brochure PDF file
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Full Brochure with specification available on request.
Link to : Load Controls Inc