A filament feed monitor and method of remediating a printing error in a 3D printer is provided. The method may include detecting motion of a trailing gear by an optical sensor. The printing error may be detected by a controller connected to the optical sensor in response to a determination that rotational motion of a filament feed roller has exceeded a predetermined threshold, which may be determined based on the detected motion of the trailing gear. A command may be generated and executed by the controller to remediate the printing error.

A fiber width adjusting apparatus includes a rotary body. The rotary body is configured to rotate around a rotation axis while interposing a sheet-shaped fiber, and cause, by frictional force generated between the rotary body and the sheet-shaped fiber, force to act on the sheet-shaped fiber while feeding the sheet-shaped fiber in a feed direction to vary a width and an orientation angle of the sheet-shaped fiber. The sheet-shaped fiber is impregnated with a resin or is before the impregnation with the resin. The rotation axis is parallel to a thickness direction of the sheet-shaped fiber. The force contains a component that is in a direction perpendicular to the thickness direction and to the feed direction.

A method for producing an adhesive tape by coating a carrier material in web form with a solvent-free adhesive composition, wherein immediately prior to the coating of the carrier material with the adhesive composition, the surface of the adhesive composition or the surface of the carrier material or the surface both of the adhesive composition and of the carrier material is heated by introduction of heat to a temperature of at least 30 C. above the processing temperature, has the effect that the adhesive composition is significantly better anchored on the carrier. For an adhesive tape produced in this way, a boost in the anchorage by up to 60% can be achieved. The penetration of the composition into carriers, especially rough carriers, can take place very much more easily under the conditions of the high temperatures and is controllable by means of the temperature regime.

A method for producing an adhesive tape by coating a carrier material in web form with a solvent-free adhesive composition, wherein immediately prior to the coating of the carrier material with the adhesive composition, the surface of the adhesive composition or the surface of the carrier material or the surface both of the adhesive composition and of the carrier material is heated by introduction of heat to a temperature of at least 30 C. above the processing temperature, has the effect that the adhesive composition is significantly better anchored on the carrier. For an adhesive tape produced in this way, a boost in the anchorage by up to 60% can be achieved. The penetration of the composition into carriers, especially rough carriers, can take place very much more easily under the conditions of the high temperatures and is controllable by means of the temperature regime.

It is intended to provide a cable pulling machine that can avoid, even when installed at a high place, a stop of pulling and a cable installation method. A cable pulling machine according to the present invention includes two roller portions c having outer peripheries between which a cable a is to be held and a guide f that introduces the cable a between the roller portions c. The guide f adjusts an angle ? formed between a straight line connecting respective centers o of the roller portions c and the cable a introduced between the roller portions c to a value of not less than 45? and not more than 90?.

It is intended to provide a cable pulling machine that can avoid, even when installed at a high place, a stop of pulling and a cable installation method. A cable pulling machine according to the present invention includes two roller portions c having outer peripheries between which a cable a is to be held and a guide f that introduces the cable a between the roller portions c. The guide f adjusts an angle ? formed between a straight line connecting respective centers o of the roller portions c and the cable a introduced between the roller portions c to a value of not less than 45? and not more than 90?.

A roller assembly having a central axis can comprise a roller having an outer surface and defining an inner bore. The apparatus can further comprise a bushing comprising a sleeve having an outer surface and defining an inner bore. The inner bore of the sleeve can have an operative circumference. The sleeve comprises a bladder that is configured to expand radially upon receipt of a fluid to reduce the operative circumference of the inner bore. The bushing can further comprise a flange extending radially outwardly from the sleeve. The flange defines a vessel containing fluid therein. The vessel is in fluid communication with the bladder of the sleeve. The bushing comprises an actuator that is configured to cause the fluid from the vessel of the flange to flow into the bladder of the sleeve. An alignment feature can be configured to rotationally position the roller relative to the bushing.

A roller assembly having a central axis can comprise a roller having an outer surface and defining an inner bore. The apparatus can further comprise a bushing comprising a sleeve having an outer surface and defining an inner bore. The inner bore of the sleeve can have an operative circumference. The sleeve comprises a bladder that is configured to expand radially upon receipt of a fluid to reduce the operative circumference of the inner bore. The bushing can further comprise a flange extending radially outwardly from the sleeve. The flange defines a vessel containing fluid therein. The vessel is in fluid communication with the bladder of the sleeve. The bushing comprises an actuator that is configured to cause the fluid from the vessel of the flange to flow into the bladder of the sleeve. An alignment feature can be configured to rotationally position the roller relative to the bushing.

A fiber winding device includes a spool assembly having a plurality of bobbins provided around a spiral wire in a circumferential direction to form a spool surface, a guide ring provided at a front part of the center of the spool assembly in a direction oblique to the spool surface, and a wire transfer unit for transferring the spiral wire to pass through the guide ring. The spiral wire is disposed to perpendicularly pass through the center of the guide ring. The spool assembly is disposed in a direction oblique to the wire, and fibers from the plurality of bobbins are wound on the spiral wire along the guide ring. In addition, by sequentially arranging a plurality of fiber winding devices along the spiral wire, fibers in multiple layers can be wound on one spiral wire sequentially and continuously.

A composite placement machine has a simplified fiber delivery path from a creel to a lay-up table. A carriage is mounted for motion in the Y-axis along the length of an overhead beam. A composite placement head having a shiftable compaction roller is supported by the carriage. A stationary creel at one end of the overhead beam forms a band of composite material having a width that extends in the X-axis. A lay-up table is mounted for motion in the X-axis and rotary motion about a C-axis that is perpendicular to the X and Y-axes. The motion of the head in the Y-axis, the shiftable compaction roller, and the motion of the lay-up table X-axis and the C-axis allows the head to apply composite material to the lay-up table in both Y-axis directions in any orientation without twisting the band of composite material relative to the X and Y-axes.