Parametric Stove Knob Generator

Essentially, there are little people called toddlers that love to interact with things their parents interact with, and sometimes that includes the stove.  My toddler pushed a step stool up to our stove and turned it on.  This was the moment I knew I needed to outsmart him, otherwise he could accidentally burn himself (or the whole house down).  But we just bought our house and we have a weird stove.  That means it's SCAD time.

I created a customizable SCAD file with the help of my best friend Gemini.  The design went from concept to code in no time at all, but after a week of testing code, tolerances, and designs, here is what I came up with.  

The print files are for a 70's era Hotpoint stove.  These knobs probably won't work on your stove (unless they do, then wow, that's kind of neat).  The tool I used allows you to create knob covers that will (probably) work on your stove, unless your stove doesn't have pins with knobs that come off.  In that situation, I cannot help you with this tool.

You want the covers to lock on very tight.  They can turn the covers like knobs, but the knobs will not turn.  You may find that in your quest for excessive tightness of knob covers that you might invent a cover that removes the back and the knob all together when you pull it.  If this happens, it may help to use my custom washer generator to create a tight TPU washer to help keep the back on.  I only needed it for one of my 6 stove knobs.  (Three different kinds of axles for three slightly different knob types, so depending on your stove, you may end up in my situation.)  Too loose is the worse scenario.  The back has a lip that helps prevent a toddler from pulling off the front cover and turning the knob, but the best scenario is the front is tight enough to never come off (except when you want it off).  It's PETG, so it will bend a bit if you squeeze it, and if your tightness is good, this may be what you need to do.

Only print it in PETG.  Stove tops get hot, so PLA is probably a bad idea.  Plus you want a bit of flexibility.  

Workflow to install a knob cover.

1.)  Pull the stove knob off of the pin (if it's removable, otherwise skip to step 2).

2.)  Put the back around the pin (or slide it behind if your knob doesn't come off).

3.)  Put the knob back on the pin and pay attention to the shape of the knob versus the axle shape to get the correct orientation.

4.)  Press the front cover on tightly.

Update:  I have a new model now that works better for the mode selector knob.  It gives a slight gap between the lip and the knob, and it shrinks the lip slightly.  This helps to give you a better grip on that knob.  In general, I recommend generating your knob covers slightly bigger than your knob and your lip slightly shorter than your knob.  If you don't, you can have a hard time using your stove.