Abstract: A spacing-sensing apparatus for use in a printing module of printer is disclosed. The spacing-sensing apparatus includes an oscillating device pivotally disposed on the frame of printing module, wherein the oscillating device has a swing body designed to be rotatably disposed on the lateral plate of the frame, and one end of the swing body is capable of making contact with the surface of a print media when the printing module descends to a predetermined distance from the printing module to the print media, allowing rotation of the other end thereof to trigger switch means for stopping the descending of printing module.

Abstract: A method for adjusting the relative position of devices of a laser engraver. The method includes an outputting device of the laser engraver to forms a marked point on a non-working piece. Let the outputting device position the center of the marked point and record it. Then an image sensing device of the laser engraver is moved to the marked point and seeks the center of the marked point. Then, the position point that the outputting device is located is recorded after the outputting device moved according to the movement of the image sensing device. Finally, calculating the distance between the center recorded by the outputting device and the position point recorded after the outputting device moved to obtain the precise distance between the image sensing device and the outputting device.

Abstract: A printhead cleaning device for a large printer provided at a lateral side of a printing rail of the printer, it comprises a base and a swinging platform, wherein the base has four peripheral sides forming a receiving space, the swinging platform is movably and pivotally connected to the base; the swinging platform has thereon a plurality of elongate holes, so that the residual ink on the printhead set can be collected in the receiving space of the base through the elongate holes, every two elongate holes have therebetween a scraper in the shape of a taper sectionally and made of soft material, so that when the base is pushed upwards by a pushing device to its predetermined position, the scrapers on the swinging platform can have scraping actions against the moving printhead of the printhead set.

Abstract: A laser cutting machine includes a cover which is pivotably connected to a side of the base of the machine. Two supports are connected between the cover and the base so as to maintain the open status of the cover. Two hand access recesses are defined in the rear end of the cover which can be pivoted upward by only one person such that maintenance can be proceeded easily and large objects conveniently access the work top surface.