Comments sought on new build: A CNC Router for RC Gliders and Planes

[njhussey]

Set up a straight edge parallel to the master rail 300mm away and put a DTI on a carriage and moved it up and down the rail. There's about 0.25mm of twist/dip mostly near the rear of the machine.

Only conclusion I can accurately draw however is that my DTI is too cheap as it moves all over the place i.e. doesn't return to zero after going up and down a few times...need a better quality DTI....

[Neale]

Set up a straight edge parallel to the master rail 300mm away and put a DTI on a carriage and moved it up and down the rail. There's about 0.25mm of twist/dip mostly near the rear of the machine.

Any thoughts on what might have caused this? I'm still experimenting with my machine and epoxy but it's been too cold in my garage lately to pour any more. Took the old epoxy off this afternoon and shall shortly be trying a slightly different technique.

[njhussey]

Any thoughts on what might have caused this? I'm still experimenting with my machine and epoxy but it's been too cold in my garage lately to pour any more. Took the old epoxy off this afternoon and shall shortly be trying a slightly different technique.

I'm going to check the rail for bow/dip tomorrow with the straight edge to see if it's that. If it is then ill shim the rail where it's twisted if I can.