Here we go again . . . MK4

[routercnc]

This lot arrived recently.

2off - RHS for the raised X axis sides - seems pretty square and reasonably straight




2off - 80x40x4 RHS for the gantry beams

1off 30x5 flat bar to reinforce the gantry beams where the rails will sit


2off ballnut mounting blocks (~£9 each)


And 4off 16mm open bearings to double up on the Y axis to make 4 per side (no photo)

Also, got a bit of time this week end to nearly finish the X axis motor mount / belt tensioning plate:

Laying it out:


First pocket:


More cutouts and slots:


Holes spotted, top skimmed, and profile roughed and finished:


Bought a new 6mm 2 flute 45deg helix (for aluminium) carbide from 'cncpoorboy' on ebay (for about £9) recently and just tried it out.
http://www.ebay.co.uk/itm/2014350347...%3AMEBIDX%3AIT

Very impressed with the finish:



Some work on the drill press:



Need to skim one side and tap the M5 holes for the stepper, then its another one done.

In case you were wondering the slot will hold the head of 2off M8 bolts to stop them rotating whilst allowing it to slide in the slot. On the other side will be a spacer and a bearing guide to tension the belt.