Sieg SX2 Plus build

[craigrobbo]

Good job, i wanna watch this as i wanted to convert mine.

[russell]

O.K. It's two weeks since I started this so it is time for an update.

I've finished scraping in the X and Y slides and improving the gib strips. Both slides work nice and smoothly now without side to side movement.

I've fitted thrust bearings to the leadscrew supports and modified the ends of the leadscrews as shown:



As the leadscrew has an undercut next to the start of the thread I machined the tread away for 1 mm so that there is a good location for the thrust bearing. The thread on the end of the leadscrew was cut off and the remaining end reduced to 1/4 in to suit the flexible couplers. The end of the 8 mm part was threaded 5/16 x 32 for a nut to adjust the preload on the bearings. I'll fit a grub screw to lock the adjustment. Just waiting for an ACME tap to be delivered so I can make the acetal anti-backlash nuts. I had to reduce the width of the bosses on the mounts to 26 mm to get everything to fit.

I've also been drawing up a Z-axis arrangement and find that I can just fit the ballscrew behind the motor if I make a cut out in the plastic motor mount.

Russell.

[rnr107]

Nice machining....! How did you do that? Have you got an other mill? Lathe?

I've also been drawing up a Z-axis arrangement and find that I can just fit the ballscrew behind the motor if I make a cut out in the plastic motor mount.

Good! I knew it must be possible some how. This should looks good!

RNR

[russell]

Nice machining....! How did you do that? Have you got an other mill? Lathe?

That was done on a sixty year old Atlas lathe with a homemade collet adaptor to ensure concentricity.

Good! I knew it must be possible some how. This should looks good!

I've just had another idea for mounting the Z ballscrew. Thread the end of the ballscrew M10 and drill and tap the top of the head casting to take it with a grub screw at the rear to lock it in place. It should all fit without any other mods. The ballnut has to be fixed above the motor in it's highest position so the assembly will be quite tall.

Russell.

RNR[/QUOTE]