Strike CNC (My first CNC router)

[Jonathan]

I was going to post something similar to what Jazz has just posted about this machine, but there's no point now as he's said it all really.

Hopefully the 4nm motors are these:

http://www.cnc4you.co.uk/index.php?r...&product_id=70

So strictly speaking Nema 24. They're quite promising as they have a low inductance for their size, though I've never tried them. It's such a mismatched system. Instead of going for a higher lead ballscrew for X (i.e. RM1610 like they used on Y, or RM2010) to prevent whipping they've used a 25mm ballscrew then stuck bigger motors on to try and compensate, but it will still be nowhere near the performance (especially acceleration) you could get with 3Nm motors and a smaller diameter screw. 5m/min is adequate as the machine probably isn't rigid enough to cut faster than that.

£600 sounds a lot to add for an enclosure, though the price is understandable given the use of aluminium extrusion. Why not just make it out of wood, e.g pine or if they have a big enough machine cut the enclosure out of plywood sheet? Should be much cheaper.

You could add more braces to the bed parallel to the X-axis without interfering with the ball-screws. Without that you may see the bed bend away from the tool when it plunges down. Plunging with the tool something to avoid anyway (unless it's a drill!) but not always possible.