The Skware

About

A small traditional Go/No-Go test for determining the amount of compensation required for engineering parts that are true to size to be made on 3D printers. Sharp corners are notoriously difficult to create perfectly, especially on a 3D printer. This often affects the final fit of the parts drastically. Fortunately, there are ways to reduce this effect. By adding another row and relieving the corners or by chamfering the peg used for fitting within the pocket, an additional dimension of simulation is offered. Use this test to discover what that potential is.

How to Use

Print the test and the pegs. Some cleaning of the test or pegs may be required. Printing slower will make for a much better first layer which is critical here. Insert each type of peg across each row, starting from the left and working your way right until the peg is first capable of being inserted to determine a minimum compensation amount for the inaccuracy of your printers and settings. The holes represent a width of 10MM plus whatever number found at the bottom of the column. Each peg represents a width of 10 MM. If the 10MM peg can only fit in the 10.4 hole, for example, then fitting parts in an assembly must compensate for this amount in order to ensure fit after printing. To make our designs operate according to this discrepancy in accuracy in this example, we enlarge our holes by 0.4MM or decrease the width of our inserting part by same.

Scale

Each column features a size, for example ".2" which means that a total of .2 has been added to the total width of the regular diameter or width (10 MM) Essentially, in the virtual scenario, the .2 sized hole is actually 10.2 MM wide hole, meaning .1 MM will be on either side of the peg used when inserted.

Contents

Regular Fitting Guide
Oversize Fitting Guide
10MM Cylinder
10MM Chamfer Cube
10 MM Plain Cube

Changes

November 14, 2017: Added "Oversize Fitting Gauge". Allows for looser fits and testing for poorer calibrations. Please check back to see future additions and other gauges.

Recommended Settings

It is advised that your first 2-3 layers go quite slow, (10-25 mm/s) in order to lay the many inside perimeters of the test well. 15% Infill suggested.

Disclaimer

Creative Commons License - Attribution I'd love to hear from you. Leave me a message if you have any questions, comments, or suggestions, and I'll get back to you right away. Thanks, and happy printing, Inventorsquare

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