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

[njhussey]

Looks good but pretty certain you wouldn't catch my fingers in the slot with the tool that close while in cycle!

Yes not a practice I'd recommend....in my defence I've run the simulation 20+ times so knew it wasn't going to rapid on me anytime soon....however I'll agree, no excuse

[Washout]

Good stuff Neil.

Was that a Fusion 360 part or i-machining?

One method I've used to avoid faffing about with zeroing off of a part like that is to cut a holding fixture in the bed and then use the same zero to then run a contour pass(es) to clean up the part.

Of course you know Jazz is going to turn up soon and goad you into cutting deeper and faster ;)

[njhussey]

Good stuff Neil.

Was that a Fusion 360 part or i-machining?

One method I've used to avoid faffing about with zeroing off of a part like that is to cut a holding fixture in the bed and then use the same zero to then run a contour pass(es) to clean up the part.

Of course you know Jazz is going to turn up soon and goad you into cutting deeper and faster ;)

Cheers Chris, it was Trochoidal machining in Estlcam. I've not really messed with fusion 360...downloaded it and installed it but I use Geomagic at work so until I get more proficient at that I'll not confuse myself by using two 3D programs....

I'm going to give the bed another surface soon and at some point I'll put the 1" thick bakerlite sheet on and use that as my surface and tap holes into it for holding down workpieces but use sacrificial wood as necessary...

I'll not need much egging on by Dean...I started at the speed and feed that was recommended for the cutter...onwards and upwards!

Chris, what tape do you use to hold stuff down?

[njhussey]

Just finished the Mk2 mount....could have been a Mk3 but this will do! Did put some engraving in the middle but got the depth wrong and it snapped the engraving bit Still I forgot the hole in the middle for the shaft to go through (manually drilled) so that would have gone through the engraving anyway....Pressed the tubes into the plate on our hydraulic press and at 2.5 tonnes pressure I don't think I need to use the Durafix to weld them in...might do it anyway but I'll see. The bolts are pulling the tubes into the plate so they're not going anywhere, just the torque twisting them. Might get a big block of Ali and mill it out of 1 block though I'll probably not bother if this works...

[Washout]

Chris, what tape do you use to hold stuff down?

Hi Neil,

Sorry - missed the question at the bottom - I use this tape:

Silverline 198134 Fixman Double-Sided Tape, 50 mm x 33 m from Amazon


http://www.amazon.co.uk/dp/B00F80K5OS

Cheers


Chris

[njhussey]

Hi Neil,

Sorry - missed the question at the bottom - I use this tape:

Silverline 198134 Fixman Double-Sided Tape, 50 mm x 33 m from Amazon


http://www.amazon.co.uk/dp/B00F80K5OS

Cheers


Chris

Cheers Chris, I'll look at getting some...would have made machining this much easier!

[njhussey]

Here's the bracket after I've made a mess with the Durafix, machined 5mm off the tubes (lathe) and bolted it to the firewall....only got 2 bolts in at the moment but WILL have all 4 in before anything electrical gets connected I promise!!!



Put the nose cone on and fitted the prop (18" diameter x 8" pitch) to see what it was like...