Fully parametric spice rack 2.0

Extended version of original "Fully parametric spice rack" by Reven. 

Against original (https://www.prusaprinters.org/prints/44067-fully-parametric-spice-rack) you can define different widths and heights for each drawer.

For example you can have:

• Drawer on the left 100mm width & 30 mm height
• Drawer on the right 50 mm & 70 mm height

You can control width and height trough variables:

Tw = [105, 40, 80, 20];    // tray width
Th = [80, 50, 80, 50];    // tray height

Where values are related to drawers from the left (on example: 1st drawer 105 mm width & 80 mm height, 2nd drawer 40 mm width & 50 mm height, etc.).

I didn't do comprehensive testing so in case you'll discover bug, feel free to put it into comments :).

Assembly

I hit the issue, that I needed bigger drawers than there is my printing area, thou I tested it's possible to make it working :)

Assembly - Drawers

Drawers can be printed as multiple prints, thou you probably need to adjust tolerances to be more lose as you will not manage to stick parts together perfectly.

Lose tolerances:

To = 1; 
Ts = 0.4;
Tg = 0.1;

Note, that rails are not going through whole drawer => if you cut drawer behind the rails, you can use standard tolerances.

For putting drawer PETG parts together I used Revell's glue and it's holding surprisingly strongly even with quite high load.

Assembly - Structure

You can print each part individually, thou problem is to stick them together. Glue will not work in this case, areas are not big enough to create stable connection as I found out hard way.

What worked for me is solder pen. I put it to 250 degress and just slide through each connection point once (the gap between each part). It melted both pieces together and created very strong connection.

Assembly - Structure thickness

I printed my structure with thickness 2.1 mm. Which resulted in quite floppy structure. It's definitely not sturdy enough if structure stands without additional support => I added double sided duck tape from 3M on bottom and right pillars to glue it to cabinet which made it very stable and nicely working even when operating with drawers.

My recommendation on thickness would be:

• Use 2.1 or more if you plan to glue it on bottom and side to something.
• Use at least 3 mm if you plan to operate it without additional support (not tested, just gut feeling that 3 mm will be total minimum).

STL files

STL files are generated for length 295 mm, width 105 mm and height at least 80 mm (in case one “floor” is enough for you). With these default dimensions they can fit Ikea spice jars.

They were generated with this settings:

To = 1;  // Minimum print tollerance, for rail
Ts = 0.4;   // Smooth tollerance for tray and structure
Tg = 0.1;   // Spacing for two pieces that are to be glued together

Tw = [105, 43, 80, 20];    // tray width
Tl = 295;   // tray length
Th = [80, 50, 80, 50];    // tray height
Wt = 1.8;   // wall thickness
Hw = 40;    // handle width
Hh = 15;    // handle height
Hd = 15;    // handle depth
Ht = 15;    // handle distance to top
Hx = 2.5;   // handle thickness

Sx = 2;     // number of structure units in x
Sy = 2;     // number of structure units in y
So = 1;     // open (1) or closed (0) top most level
Sb = 0;     // number of open (no top) structures in addition to Sx x Sy
St = 2.5;     // Structure thickness (2mm minimum recommended)
Sd = 15;    // Structure depth
Ss = Sd/3;  // Slot depth, minimum should be 2mm; Adjust accordingly.
Sh = 155;   // Structure height
enableEndstop = 0;  //1 = enable end stop preventing drawer to be taken out, 0 disable end stops.