thank you. I produced the gcode with Estlcam (no further post processing) and printed direct form SD-card via smart lcd. I can find the feed speed values produced by Estlcam in the gcode (Fxxx commands) but only G0 commands for travel and no speed value setting for G0. So I assume the travel speed value must be set somewhere in Marlin. If it is not XY_TRAVEL_SPEED I have to look further.