PonokoXIdlerAssembly
Ponoko RepRap X Idler Assembly
The X Idler holds an idler wheel on a freely rotating bearing that is used to tension one end of the X axis drive chain. It has two arms that reach out to rest on the Y axis and support the X Axis Assembly. It also has clamps for each of the 4 X Axis Guide Rails.
This is what it looks like when fully assembled. Note that the arms of the r-shaped Y Saddles reaching out from the central X Axis End Spacer are unusually thin in these illustrations.Yours should be made of stronger 8mm acrylic - but take great care when tensioning them anyway!
You will need the following bits:
Put washers on 4 M3 16mm screws and bolt them through the X Axis End Spacer.
Then do the same with 4 M3 12mm screws but from the other side.
Locate the parts for the Y Saddle and Chain Clamp. Note that the example saddle here is cut from 4.5mm acrylic; later ones will be cut from 8mm for additional strength. They need it.
Assemble one Y Saddle with the chain clamp against one side, and a second with it on the other. The two clamps should be mirror images of each other.
... tinker intelligently with the remaining parts until enlightenment strikes.
When yours is done, it should look like this:
Now you can construct the X Motor Assembly.
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-- Main.VikOlliver - 23 Oct 2008
- Bracing for two Y Saddles:
- Braced pair of Y Saddles:
