Sieg SX2 Plus build

[russell]

Three weeks since my last update. I don't know where the time goes (well, yes I do - gardening, making new wheels for sliding patio doors, other projects).

Still, the M12 x 2 trapezoidal tap arrived from China last week so I was able to make a couple of anti-backlash acetal nuts for the leadscrews based loosely on the Brian Pitts design:

Y leadscrew anti backlash nut.

X leadscrew nut.
and finally (for now):

Base assembly (almost) complete. Just have to fit some mounting brackets for the home/limit switches.

I can now adjust it to give me 0.5 thou backlash on the Y axis without it getting unduly stiff. However, the X axis gets stiff when the backlash is reduced below 2 thou so I have some investigation to do there.

Now to start on the Z axis. I've done some layout drawings and find it is just possible to get a 16 mm ballscrew to fit behind the motor on top of the head so that's the way I'll go. The ballnut has to be mounted rather high up though.

So - back to the workshop.

Russell.

[rnr107]

Now to start on the Z axis. I've done some layout drawings and find it is just possible to get a 16 mm ballscrew to fit behind the motor on top of the head so that's the way I'll go. The ballnut has to be mounted rather high up though.

Hi Russell,
Can you post a drawing to show what you are trying to do? I don't understand why the Ballnut would have to be placed high up ?
Are you attaching the stepper on the ballscrew or are you fixing the screw and spinning the nut ?

Laurent

[russell]

Can you post a drawing to show what you are trying to do? I don't understand why the Ballnut would have to be placed high up ?
Are you attaching the stepper on the ballscrew or are you fixing the screw and spinning the nut ?

Hi Laurent,
I am attaching the ballscrew to the head and spinning the nut, much as seen on the Hossmachine site here However the SX2+ has very little space behind the motor and the ballnut has to be mounted above the motor height at the top of the Z travel. I will try to post a drawing later.

Russell.

[rnr107]

Ha.... OK, all clear now! :-) I like it.... very nicely done...