Singer Parameterised Fashion Disc

thingiverse

This is a parameterised version of the Singer Fashion Discs. By having it parameterised you can create whatever fashion disc you like. I have used Fusion 360 to CAD the disc. The Singer_fashion_disc_parameters.csv file contain parameters to be used to create your own Discs. The first 19 lines are used to adapt the CAD-file to your printer. The first 18 parameters are filled in with a number 0-12 to set the needle sideway position for each stitch. Pos1 is sideway position of stitch 1. Pos2 position of stitch 2 etc. Position 0 correspond to placing the needle to the far left. Position 12 correspond to placing the needle to the far right. To be able to load parameters into Fusion 360 the ParameterIO Add-in is needed. Since all printers behave different I have introduced a tolerance parameter. Set the tolerance setting according to your printer. I need to set it to 0.2 to get the correct dimension on the inner diameter and also the correct height on the disc teeth. Calibration: Turn the machine by hand during calibration. 1.Print the default disc using positions 12,0,12,0,etc. 2. Test the disc and check, 2.1 That the disc can be mounted snuggly 2.2 That the lowest position do not affect the lifting arm, but there should also not be any gap. 2.3 In the highest position it should not be possible to lift the arm any further. The arm should also not be forced passed its maximum position. I have seen that the needle movement between position N and N+1 on the original discs is not optimal. The sideway move start too late and is not done when the needle is on the top crest. By shifting the disc pattern 2° clockwise I get the perfect timing. This makes it important to mount the discs in the correct orientation. There is a Star on the disc that is supposed to be facing toward you when the disc is mounted. Also, by printing the disc with the Star facing down towards the heat bed, a potential elephants foot will not affect the tolerances. Tested and verified on a Singer 319, but might also work with Singer models, 306, 238, 240, 248, 258, 316, 320, 338, 348, 360, 418, 477, 478, 514, 518, 538, 818, 838, 1730, 1800