corrections will take place. Since no equipment is perfect, we must accept that a certain range of error is normal. To make corrections within this range only adds an additional error due to hunting, and broadens the error range. This parameter controls and prevents this. This parameter is adjusted automatically by the software according to the actual conditions of the metering.
This number has been set based on our experience with the dispense devices. If, over time, the computer finds that the number is too large or too small, it will automatically adjust it to match the actual conditions that exist with your equipment. These adjustments occur in small increments once every 20 cycles. A change is made only if needed. Checking this number from time to time will indicate the normal error range that is occurring with each dispense device.
If you manually set this number to a very high value, you will effectively eliminate all error correction attempts for the component. Gradually, over several months, the software will adjust this number back down. If you wish to defeat a component's error correction routines permanently, you may set NC to (_NC 29999). The software recognizes this number as special and will not change it. This high setting eliminates error correction attempts for this component. The component is still weighed, and retries still occur if short, but the timing of each dispense is based only on previously learned rates and never adjusted from new experience. A very small dispense in a high vibration environment may actually be more consistently accurate if no adjusting occurs.
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_RP and _RD (probably no need to ever change this)
(_RD is reset AUTOMATICALLY shortly after POWER ON)
These two parameters determine the dispense shortage error that is be acceptable for each component.
_RP is the shortage expressed as a PERCENT of the target dispense weight and _RD is the shortage expressed in GRAMS. These parameters are used together, either one will force a "retry".
A "retry" is an additional dispense that is calculated to add the amount of material that is short. This comes into play only when the amount dispensed is less than expected.
Retries will occur until the difference between the required amount and the metered amount is equal to, or less than, the _RP percent difference AND the _RD weight difference.
These numbers dictate just how close to perfect the dispense has to be before going on. If the dispense overshoots the target, then the process continues. These parameters only control the degree of weight SHORTAGE that is acceptable.
The _RP parameter is important when SMALL DISPENSE requests for color or additive are made. Large PERCENT errors are more likely to occur when very small dispenses are requested.
The _RD parameter is important when LARGE DISPENSE requests for color or additive are made. Large GRAM weight errors are more likely
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