Here we go again . . . MK4

**routercnc** · 06-01-2018

Thanks Nr1madman. Most of the ideas have been borrowed from looking at too many other machines!

Thanks Nickhofen glad you are enjoying it.

**Edward** · 06-01-2018

Hi routercnc,
Greatly enjoying your videos! One question, on your latest one, after cutting all the extrusion uprights, how did you machine them to be exactly the right length and exactly square?
Did you clamp them in the vice to be perfectly perpendicular and then machined the top, then turned over and machined the opposite end? Thanks.

**routercnc** · 06-01-2018

Originally Posted by Edward

Hi routercnc,
Greatly enjoying your videos! One question, on your latest one, after cutting all the extrusion uprights, how did you machine them to be exactly the right length and exactly square?
Did you clamp them in the vice to be perfectly perpendicular and then machined the top, then turned over and machined the opposite end? Thanks.

I actually cut them several months ago before I started making videos so what you see in ep10 is staged for continuity. But when I did cut them out I remember spending time setting up a stop and cutting a few practice ones to get them dialled in for length. The saw cuts pretty square and I did not need to machine them afterwards. Also the steel section which sits on top is not flat so there is no point in chasing tenths on the uprights. When it goes together I may need some shims and when bolted tight the top steel section may get pulled down unevenly. But this is fine as it will have epoxy levelling to get it all aligned for the rails.

EDIT !
Sorry Edward - went out to the workshop this morning and had a closer look and they do actual having machining marks on the ends, plus they have numbers on them (e.g. -3, 7, 4 . . . ) which are the errors in hundredths of mm at various places across the end on the total length. Sorry - so many parts I lost track there. Yes, I did machine them to final length.
I would have clamped them against the side of the vice and made sure they were flat onto the bed (as the sides are not straight/flat).