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

[JAZZCNC]

One thing I'm happy with is the Z axis. I was expecting to have to loosen bolts on the Y & Z axis to adjust the spindle to get it at 90° to cut flat. I did a pocket with a 0.4 stepover and it was so smooth I reckon that by sheer bloody luck the spindle is almost exactly at 90°. When I surfaced the bed this morning (pocketing at 7000mm/min, 6mm 2 flute coated carbide bit at 0.4mm stepover and 0.5mmdepth of cut) I couldn't notice any ridge at all, totally smooth.....jammy bugger, makes up for the broken tap in the base!

Why such a small step over neil.? . . . . With 0.4mm it must have took for ever.?

The Acid test for tram is when you use a wide cutter.!! Try 50mm with 75% step over and see what happens.? 6mm with only 0.4mm step over will hide most error. Also cut both X & Y direction.

[njhussey]

Why such a small step over neil.? . . . . With 0.4mm it must have took for ever.?

The Acid test for tram is when you use a wide cutter.!! Try 50mm with 75% step over and see what happens.? 6mm with only 0.4mm step over will hide most error. Also cut both X & Y direction.

The step over was what was in Cambam and gave a good finish so I kept it, yes took a while to surface it. I'm going to get a small fly cutter to do the surfacing in the future so we'll see then!

Going to be spending the next few weeks playing with speeds and feeds on various different materials...looking forward to it

[JAZZCNC]

I'm going to get a small fly cutter to do the surfacing in the future so we'll see then!

Wide cutter will give you perfect finish if trammed correct and take fraction of the time.

Wouldn't get a fly cutter these spindles don't like them. Get one of these with indexed tips http://www.wealdentool.com/acatalog/...nning_928.html

Or if on budget one of these. http://www.wealdentool.com/acatalog/..._Wing_250.html

[Clive S]

I have the budget one above and it works well I can do my bed in a few minutes