General pointers for a CNC router

[scott88]

Interesting point. It seems to work well for Toomast but he did use 100mm box for the frame.

Possibly a tweak on this design could reduced the rail height and slightly increase the gantry height, that should potentially reduce any lateral racking.

I don't fancy bracing the front of the machine as it would make loading awkward.

[JAZZCNC]

Interesting point. It seems to work well for Toomast but he did use 100mm box for the frame.

Possibly a tweak on this design could reduced the rail height and slightly increase the gantry height, that should potentially reduce any lateral racking.

I don't fancy bracing the front of the machine as it would make loading awkward.

Don't over think it because it's not required for the use your wanting it for, infact, for a sheet material machine you'd be better without the high sides to make loading and access easy, just build a strong gantry with stiff sides will easily do what you need. Over engineering might appear good at first until the real world issues stick there heads up because Accessing cut parts on a 8x4 with high sides is a pain in the arse unless your 7ft tall.!

[scott88]

I'm not far off 7ft tall but I get your point :D

I guess I was wanting it to do everything, but that's obviously not going to happen.

I've just been looking at your vertical machine on YT Jazz, it's a beast. I'm just looking through the options for dealing with whip on the long axis, so will probably go with thick ballscrews. I think the step up in price will still be cheaper/easier than a rotating ball nut.

[JAZZCNC]

I'm not far off 7ft tall but I get your point :D

I guess I was wanting it to do everything, but that's obviously not going to happen.

I've just been looking at your vertical machine on YT Jazz, it's a beast. I'm just looking through the options for dealing with whip on the long axis, so will probably go with thick ballscrews. I think the step up in price will still be cheaper/easier than a rotating ball nut.

Being thicker doesn't mean they won't whip, it's the rotation speed you need to think about if your rotating the screw. Going with a larger pitch and using ratio to decrease the screw RPM is what you need to look at.

If you want to see 10x5 vertical then I'm just up the M62 at Goole.!

[scott88]

Thanks Jazz, I'm actually just reading about different pitches etc. My head is about to explode!

Thanks for the invite, I'd definitely like to see it and pick your brain :D