The Shop > CNC

The basics

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Will_D:
Thanks for replies - I think I will leave the nut in-situ and see what happens, with Pekka's idea as backup.

awemawson:
My only experience dismantling ball screw nuts was unintentional a few years back  :bang:

I bought a job lot of ball nuts each on a short length of screw as a retainer, and fiddling with one of course it all came apart in my hands  :bugeye: Fortunately it was over a tray and I retained the balls but it was quite a palaver re-assembling it !

Fiddly little things

Will_D:
So digging deeper and order hardware and RTFM 9all I can get)

So what are "Home Switches"?

Limit Switches I ubderstand, Kill Switch also.

Is it some kind of auto zeroing?

And one more:

How to calibrate steps versus mm travelled?

efrench:
Limit switches kill the machine. Home switches set accurate home position.  Basic homing routine is to move the carriage until the home switch is triggered, move back a small distance, then move towards the home switch at a slower speed.  When the home switch is triggered this time, set the home position.  This is just one homing strategy, there are several others.

PK:
To add confusion, many machine controllers will allow you to use the limit switches to home.

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