Messages

491

Show"N"Tell ( Your Machines) / Re: 9x20 Chinese Lathe Conversion

« on: April 24, 2012, 01:48:10 PM »

After the headstock had been aligned parallel to the ways by filing its V-guide, it became a bit lower and the tailstock needed to be aligned accordingly. I took apart the top part of the tailstock and milled 0.3mm off from the tailstock base:


Got it aligned to within 0.03mm vertically. It's quite a satisfactory for me.


Dan

492

Show"N"Tell ( Your Machines) / Re: 9x20 Chinese Lathe Conversion

« on: April 23, 2012, 11:46:28 AM »

Assembled the cross slide and linear guides and the X axis ball screw. Here are a couple of pictures:





It's just a preliminary assembly test so not all screws are there and it's not tightened yet. All fits nicely and look like it's going to work

Also made a spacer ring to mount the pulley on the spindle. It was needed because the original pulley was wider being 3 stage and plus there was a gear on the spindle. Just turned down the the original pulley and cut off the required length. Here is the spindle pulley mounted:


Dan

493

Show"N"Tell ( Your Machines) / Re: 9x20 Chinese Lathe Conversion

« on: April 18, 2012, 09:23:04 AM »

Thanks for sharing the methods, Hood. While I could think there would be one like the first, the second one is interesting. Not as practical being a few months, but interesting nevertheless. Anyway, parts are sent out and it should take a few days.

Dan

494

Show"N"Tell ( Your Machines) / Re: 9x20 Chinese Lathe Conversion

« on: April 18, 2012, 07:37:29 AM »

Got it painted:


I figured I wouldn't paint the aluminium parts. Wasn't sure how this paint would hold up on aluminium so figured I would rather have them anodized. So another little delay

Dan

495

Show"N"Tell ( Your Machines) / Re: AL54b (lathe) project from New Zealand

« on: April 14, 2012, 06:25:23 AM »

I like your chip bin solution on the lathe and I have considered it for my 9x20 lathe, but I was afraid of losing rigidity so will have to manually remove the chip each time

Dan

496

Show"N"Tell ( Your Machines) / Re: AL54b (lathe) project from New Zealand

« on: April 14, 2012, 06:01:50 AM »

Looks good so far.

Dan

497

Show"N"Tell ( Your Machines) / Re: 9x20 Chinese Lathe Conversion

« on: April 13, 2012, 04:31:36 AM »

LOL

Would love to see it running by Monday myself, but there's a lot of work to be done yet. Next I am going to paint it. Then I am expecting the sheet metal parts to arrive next week and I will have to do some welding and then paint the enclosure and cabinet. Will then assemble it all and start working on the electronics. If all goes well and I don't get distracted by work I expect it running in about 3 weeks.

Dan

498

Show"N"Tell ( Your Machines) / Re: 9x20 Chinese Lathe Conversion

« on: April 12, 2012, 12:47:50 AM »

Bored all the timing pulleys. These is the X axis set:


It's a 2:1 reduction as I wanted to increase resolution on the X. The Z is 1:1 since I don't need that high of a resolution but better to have the speed there. This is the Z set with a key slot cut in the ball screw pulley (didn't have enough thickness after boring the 10mm diameter hole to allow for set screws as in the others):


And the spindle set:


Dan

499

Show"N"Tell ( Your Machines) / Re: 9x20 Chinese Lathe Conversion

« on: April 09, 2012, 01:59:50 PM »

Here is the X ball screw with a locking nut I made:


It's 12mm diameter 5mm pitch Hiwin ball screw, preloaded to zero backlash. And forgot to mention the Z ball ball screw specs in the previous post: it is 14mm diameter, 5mm pitch.

The ball nut will be mounted to the cross slide with this mounting block:


Dan

500

Show"N"Tell ( Your Machines) / Re: 9x20 Chinese Lathe Conversion

« on: April 09, 2012, 01:52:17 PM »

Made a ramp for triggering Z home switch:


It's made from steel and mounted on the bottom of the ball screw mounting block:


Also made a bearing support for the Z ball screw floating end:


Dan