Patent ID: 8807682
Filing Date: 2014-08-19
Classification: B41J

Abstract:
1. A liquid ejecting apparatus comprising: a liquid ejecting head unit which has a plurality of liquid ejecting heads having nozzles through which liquid is ejected, and a head securing member to which the plurality of liquid ejecting heads are secured in parallel in a first direction; a head unit movement mechanism which moves the liquid ejecting head unit in the first direction; and a linear encoder which has a linear scale arranged along the first direction and a detector for reading a scale formed on the linear scale, the liquid ejecting apparatus controlling liquid ejection of each liquid ejecting head based on a detection signal from the linear encoder, wherein when it is assumed that an expected maximum temperature change from a reference temperature during usage of the liquid ejecting apparatus is Δt, a liquid landing interval corresponding to dot formation resolution on a landing target in the first direction is P, a maximum distance between nozzle rows of the liquid ejecting heads on the head securing member is L, a linear expansion coefficient of the head securing member is al, and a linear expansion coefficient of the linear scale is α2, L(|α1−α2|)Δt≦P/2 is satisfied.