Saturday, September 21, 2019

Wltoys 12428b (part 25: Fixing slop in steering)

Setting less terrible toe angles seemed a bit pointless when the wheels kind just point wherever they want anyhow.  So that's the next order of business.

I needed a very thin shim, and after looking at the cost of stock at the hobby shop, i very carefully cut down an aluminum can.  I cut this little strip with a steel straight edge and 4 or 5 passes with a Stanley knife. 

0.16mm thick and ~1.89mm high.
Curiously, a can is about 0.25mm thick at the bottom and 0.12mm thick at the top.  So not only is it free, but we can make shims of different thicknesses!

The idea was to remove the play in this part of the steering mechanism.  I'm hoping a picture tells a thousand words, because i'm not sure i can explain it..

Craft knife points to the shim being inserted from the right.
It took a little fettling to get it to fit, and in the end instead of pushing the shim in, i ended up holding it in place with long nose pliers and moving the normally stationary part onto it (if that makes any sense).  

When it was inserted, I tightly folded the ends over so hopefully it stays in place.

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