When the second Line Encoder is enabled, the Trim Correction menu in the Setup Screen has a Trim Correction Encoder setup that is used to select which encoder to correct. It is supposed to default to the last encoder used to make a part.

There was a bug that failed to consider which encoder was the Master and which encoder was the auxiliary encoder. When the Entry(2) encoder was selected as the Master the Trim Correction setting was initialized incorrectly.

When the Auto Correct Auxiliary Encoder setting is set to Enabled, correcting the Auxiliary encoder does not really make sense because any correction is going to get overwritten by the Auto Correction. When this is enabled we are assuming that the operator has been correcting the Main encoder periodically since that is required to the auto correction to work. Using this logic the Main encoder must also be incorrect by a proportional amount. It becomes logical to do the correction on the master, which also updates the Auxiliary by the same proportional amount.