If the encoder is connected at the MaterialCounterAxis TM input, the material length is determined via the number of revolutions. The material length is displayed via the feed constant of the reference axis (modulo axis) at the lrMaterialCounter output. The counter content is persistently saved.
What happens? Material length counting is imprecise.
When does this behaviour occur?
The behaviour occurs when using the velocity values from an encoder axis.
Which products are affected? L_TT1P_Winder function block from L_TT1P_TechnologyModules_LM library (V3.10.0.8 and higher)
Short-term measures:
Simulate the material speed from an encoder axis via the position difference.
Example:
lrPosDiff :=LM_ExtEncoder.lrActPosition - lrPosDiffOld; // Calculate actual position difference lrModuloDiff := L_MC1P_HlpModuloDiff(lrDiff:= lrPosDiff, lrLen:= 360); // Correct modulo overflow with help function lrPos := lrPos + lrModuloDiff; // Add calculated modulo position lrPosDiffOld := LM_ExtEncoder.lrActPosition; // Save actual position for next calculation
Evaluation/recommendations:
If the above-described short-term measure is observed, the material counting error will be minimised.
