Resolve Dual Servo Toolchange Z Creep #27381
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Issue was reported where Dual Servo multi-material prints had a stretch in Z height that accumulated and grew over the prints. In testing we found that the tool change routine was not applying the Z correction as with single servo. Prior to the change, over 100 tool change cycles a CMOS laser measurement changed from 2.164 starting, to 2.464 final for a .3mm total z rise when the first move after the tool change contained a Z position (z hop from the slicer) where travel moves without this z hop (XY Only) were correct. Changing this allowed the planner to correctly map the offset z height on nozzle change and prevented the creep.
Also reduced tool change Z move speed to 1/2 max velocity for the axis. Max feedrate is rarely the desired, especially for a non-configurable speed.