Here we go again . . . MK4

[routercnc]

The tram plates also needed holes in the side. Here was the set up:


These holes needed to go all the way through the part, which is quite wide. The cnc machine can bore about 20mm into the hole, so the rest would need to be drilled out. But I didn't trust the drill not to wander so machined the bores on BOTH sides of the part using this fixture. Then drilled it out on the pillar drill from both sides until it met roughly in the middle. Guaranteed to get a straight hole !


Then counter-bored to hide the cap head and cleaned up:


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Onto the Z stepper mounting plate, which will hold to the 2 stepper motors. First time using Fusion360 so a bit worried about how it would turn out (didn't need to worry as it turned out and have not looked back). Exported the part as an IGES file from my CAD programme and used F360 for the CAM. Very impressed with it. Here is the part to be machined:


As you can see I was still using a profile method to cut it out (hangup of using Vectric Cut2D), but have since learnt much better methods.

Holes:


Profile:


Stepper holes drilled and tapped, and done:


More to follow . . .