How much deflection to expect...

[Wal]

>If you dismantle the ballnut you'll probably find there's a ball in the wrong track, or bits of swarf in it.

Heh, no - I'll find myself on ebay looking for another one as it becomes clear that I'll never put it back together again..! That particular nut is very easy to get to as it sits directly under the table. Thanks for the tip re: bearing alignment. I did take my time putting it together and nipping things up progressively whilst moving the gantry from one end to the other. I'll have another look at it now. Despite the bit of binding when pushing the gantry by hand, it's still pretty easy to turn via the screw...

Cheers Jonathan.

Wal.

[Jonathan]

Despite the bit of binding when pushing the gantry by hand, it's still pretty easy to turn via the screw...

It's not too far off then, but remember the ballscrew gives a very large mechanical advantage, so it's easier to notice the bigger increase in force required to overcome the extra torque to backdrive than it is to notice the extra torque.

[Wal]

An update from the last couple of days, although I guess I ought to start a new build thread really - going a bit OT. I'll make it quick:

• Flipped the rubber - the protective flaps are working now - they look a bit kooky, but so long as they keep the worst off, I'm happy. Will also fit 'em to the table to protect X-running gear.
• Motors mounted and wired in (thanks to Clive S for the covers!)
• Monitor mounted to the frame and PC installed. Really nice having the DRO right next to the work-area.
• All gantries moving, a quick check of run-out along table X shows .07mm - the majority of which happens towards where the hint of binding was showing up - I'll whip the rails off and make sure there aren't any high-points.

All in all coming along quite nicely, still unconvinced by the clicky ball-nuts - I take it that they come pre-greased? Or should I squirt a bit more in..?

Photos:



Wal.

[JAZZCNC]

All in all coming along quite nicely, still unconvinced by the clicky ball-nuts - I take it that they come pre-greased? Or should I squirt a bit more in..?

No there'll be more grease in your hair than those nuts.!!. . . .Definately give them some grease.

Coming along nice and looking good. . .

If that screen is a touch screen then i'm not sure I'd have it that close to machine.?. . . . I wounce used a friends machine with a touch screen mounted next to machine but on a swivel head and while using the bloody thing kept Stopping, feedrate would change and all sorts of strange happenings.?? . . . Anyway after calling my mate's machine some nasty names and calling him over asking what the F'#k was happening he turned screen away and said try again.!!. . . . Yep flying chips where hitting it and changing feed over ride, feed hold etc. . . .Lol . . Was Very Funny.!!