Here we go again . . . MK4

[routercnc]

Thanks Dave. Yes, glad I managed to squeeze two steppers on the Z axis. It is too heavy for my scales so I need to find a way to weight it. Certainly picking it up is a challenge (and there is no spindle yet).

The whole machine will run initially off 3 Nm steppers at about 70V, through some fairly old analogue drivers (DQ860MA) and a DB25 breakout board through the parallel port. Not massively high spec so it will be interesting to see how it copes with the weight of everything . . .

By the way, thank you for the grub screw insert idea. You might have seen your name mentioned in the video (faintly on the 'Grub Screw Insert' title page) ! I tried to get much larger inserts in there but there was no space on the upper part to go much bigger. I would have needed to counter sink them into the lower part (manually, no CNC!) but even there the space between other fixing holes was tight. The surface area of the 8 mm discs is much bigger than the 'ring' contact area on the base of the hollow cone on the end of the grub screw so will be better. I could always make new plates with steel pad inserts if the head keeps moving out of alignment.