Pentominoes in a case

thingiverse

This set of Pentomino pieces comes with a handy carry case featuring a swivel top design. Inspired by the novel 'Chasing Vermeer' by Blue Balliett, it helps users solve problems using pentominoes. The case is Nintendo DS size and has a clear cover to prevent pieces from falling out. Later, larger sets were made for school Maths departments. The case consists of two layers of 3mm and one layer of 2mm acrylic. The top layer's surround is bonded to the base layer using Tensol 7 acrylic cement. An M3 lock-nut is inserted from the bottom, held in place by an M3 countersunk fastener that also allows the swivel cover to function. A *.dtd file is included for direct use with Techsoft 2D Design software, commonly used in UK schools for laser cutting. Before assembly, measure the thickness of your acrylic material as dimensions may vary. The clear cover requires 2mm acrylic for a more elegant and flexible fit. Measure the diameter of pins carefully and test to achieve a tight fit. Adjust hole sizes if necessary. Set cutting height and apply settings for the 3mm layers, followed by cutting the 2mm clear acrylic cover. Carefully countersink the larger hole in the cover using a drill press or hand countersink tool. Cut aluminium pins to size, allowing them to protrude about 1.5mm, file one end flat and the other domed. Align the surround with the base and secure it with aluminium pins. Insert the lock-nut and screw in the M3 fastener. Apply acrylic cement along the edges where layers meet using a fine brush or cotton butt. Allow it to seep in by capillary action. After a minute, unscrew the fastener, fit the clear cover, and enjoy playing with your new Pentomino set while reading 'Chasing Vermeer'. Remember not to overtighten the fastener, and adjust or replace aluminium pins if needed before applying glue.