Welcome, Guest. Please login or register.
Did you miss your activation email?
October 25, 2014, 02:37:46 PM

Login with username, password and session length
Search:     Advanced search
* Home Help Search Calendar Links Login Register
  Show Posts
Pages: « 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 »
361  General CNC Chat / Show"N"Tell ( Your Machines) / Re: 9x20 Chinese Lathe Conversion on: April 18, 2012, 06:37:29 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 Sad

Dan

362  General CNC Chat / Show"N"Tell ( Your Machines) / Re: AL54b (lathe) project from New Zealand on: April 14, 2012, 05:25:23 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 Sad

Dan
363  General CNC Chat / Show"N"Tell ( Your Machines) / Re: AL54b (lathe) project from New Zealand on: April 14, 2012, 05:01:50 AM
Looks good so far.

Dan
364  General CNC Chat / Show"N"Tell ( Your Machines) / Re: 9x20 Chinese Lathe Conversion on: April 13, 2012, 03:31:36 AM
LOL Grin

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
365  General CNC Chat / Show"N"Tell ( Your Machines) / Re: 9x20 Chinese Lathe Conversion on: April 11, 2012, 11:47:50 PM
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
366  General CNC Chat / Show"N"Tell ( Your Machines) / Re: 9x20 Chinese Lathe Conversion on: April 09, 2012, 12:59:50 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
367  General CNC Chat / Show"N"Tell ( Your Machines) / Re: 9x20 Chinese Lathe Conversion on: April 09, 2012, 12:52:17 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
368  General CNC Chat / Show"N"Tell ( Your Machines) / Re: 9x20 Chinese Lathe Conversion on: April 08, 2012, 12:44:41 PM
Thanks Hood!

Sorry for the slow update. Have been too busy lately.

This is the ball screw I am going to use for the Z axis:


It will be mounted on the front, where the original lead screw used to be. I made a mounting block for the ball nut out of aluminium:


The mounting block will be bolted to the bottom of the saddle. And here is the mounting block I made for the bearings housing:


The bearings housing will go into the round bore and the stepper motor will be mounted on the opposite side. I will be using timing belt drive between them. The elongated bore for the motor will allow for belt tensionning.

Dan
369  General CNC Chat / Show"N"Tell ( Your Machines) / Re: Just got a lathe to retrofit on: March 20, 2012, 03:16:26 AM
Thanks for the details, Hood. So the screw actually tightens the ball against the taper and so an O-ring is not needed. Slick.

0.25mm/rev doesn't sound that slow Smiley

I'll have to consider that... must be lathes serve as very good work benches Cheesy

Dan
370  General CNC Chat / Show"N"Tell ( Your Machines) / Re: Adding a 4th axis to my mill on: March 20, 2012, 02:10:11 AM
Here, for your reference:

http://www.ntnamerica.com/pdf/2200/brgfits.pdf

http://www.promshop.info/cataloguespdf/a049-057.pdf

Dan
Pages: « 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 »
Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2013, Simple Machines Valid XHTML 1.0! Valid CSS!