Page 1 of 14 12311 ... LastLast
  1. #1
    Hi All
    I need some help please regarding the conversion of a pillar drill to a mill. I know this isnt the best base for a mill but I need a machine to build the proper router.

    I recently bought 2 meat slicing machines from a scrapyard so have the rails and motors for the X Y table.

    My first question is if the 120N-cm Vexta steppers driving a 2mm leadscrew will be strong enough?

    And since the spindle has no through hole i cant fit a collet chuck and draw bar, so what is the best solution for minimum run out?

    As I said I dont need this to be fast but would like it to be accurate.

    Thanks in advance
    Ross

  2. And since the spindle has no through hole i cant fit a collet chuck and draw bar,
    Tool holding is going to be your biggest problem (apart from the spindle bearings failing because they won't take side load). You cant use a normal jacobs type chuck to hold an end mill; it simply will not grip it tight enough for safe use (been there, have the scars) . You'll need to find some way of fitting a collect chuck (i.e. a cheap chinese one) to the drill spindle. If your current spindle has a taper fitting you'll need to supplement it with a bolt up into the the spindle else it will fall off (once it has come off the first time it'll never fit as tight again).

    Once you've sorted the above, find yourself a reasonable (4" or bigger) cross slide vice and you will be able to make fairly good light cuts in ally.

  3. #3
    Thanks Kip/ Bill
    you have confirmed me suspisions about the spindle, have to have a re-think!

    I'll post some pics tommorow. Ive got 3 more weeks of college work then Im good to go, so trying to get everything sorted/ordered for then.

    It sucks working and studing, but it pays the bills :sad:

    Thanks again
    Ross

  4. #4
    Quote Originally Posted by Ross77 View Post
    2mm leadscrew will be strong enough?
    Yea i think you should be able to cut Rizla with that no problem, i would use some kind of coolant with that though. :heehee:
    .Me

  5. #5
    Quote Originally Posted by Ross77 View Post
    Hi All


    My first question is if the 120N-cm Vexta steppers driving a 2mm leadscrew will be strong enough?


    Ross
    2mm? is that pitch or a typo?

    Jeff.
    Nothing is foolproof......to a sufficiently talented fool!

  6. #6
    yeah sorry effective 2mm pitch, the screw is 3mm pitch (i hope, could be 1/8 imperial) but I plan to use a 3:2 reduction on the belt drive to gain a small increase in motor power and reduce loading on the screw.

    cheers for the coolant advice hadnt thought about that. I have some ideas for the spindle but will wait till i can sort out the pics, will be easier to describe

    P.S How do I up load pictures? Tried uploading to the media centre but it failed.:exclaim:

  7. #7
    Quote Originally Posted by Ross77 View Post
    P.S How do I up load pictures? Tried uploading to the media centre but it failed.:exclaim:

    What was the error it gave you ?
    .Me

  8. #8
    Hi Lee
    The error message was "Sorry, Ross77: No Item or Item is Now in Moderation Queue - Check Back Later"

    Ups just re read it, may its in the moderation queue! if not amI doing something wrong?

    Cheers and sorry if you have lots of the same photo in the moderation queue

  9. #9
    Ok worked out how to attach photos, sorry Lee if it isnt the prefered way with the media centre.
    here is the pillar drill with x axis attached
    Click image for larger version. 

Name:	Pillardrill_1.JPG 
Views:	805 
Size:	46.3 KB 
ID:	463
    I plan to cut down the upright once i know the height needed

    Click image for larger version. 

Name:	Base plate.JPG 
Views:	662 
Size:	178.8 KB 
ID:	464
    The rails are 22mm and have a solid brushing on one side and a skate bearing set up on the other side

    Click image for larger version. 

Name:	Y axis.JPG 
Views:	585 
Size:	268.4 KB 
ID:	466
    This is the the y axis,once its cut down, with the 3mm lead screws

    Click image for larger version. 

Name:	Drive screw.JPG 
Views:	616 
Size:	223.3 KB 
ID:	468
    This is the drive from the machine but it only has a half drive nut and not enough travel, any one know if you can get a acme nut for a 16mm dia. with 4mm pitch?

    Click image for larger version. 

Name:	Quill.JPG 
Views:	604 
Size:	199.2 KB 
ID:	465
    And the biggest problem is the quill. The bearings are shot so I plan to get new taper bearings anyway. I have a couple of ideas to mount a collet chuck.

    1. get a 2no. taper ER25 collet chuck and dowel/glue it to the quill through the knock out hole(if thats what it is called)

    2. use a 20mm straight shank collet chuck to got through the bearings and then cut and turn down the qull to preload the bearings and secure the collet, leaving the spline section to function

    3. the most favourable, but hardest to acheive, is to use an ER 25 morse taper collet and drill down the centre of the quill to fit a drawbar. not sure if this will leave enougth strength in the quill.

    Any way I had better stop now before you all fall asleep:heehee:
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Control board.JPG 
Views:	425 
Size:	228.7 KB 
ID:	467  

  10. #10
    Hi Ross, looking good mate !

    I'v had a look and yes all your pics had gone to the mod que, thats now been turned off and your pics will go strate into the pub gallery as soon as you upload them. You did me a favor telling me you had this problem as i didnt know that was happning for standard members so thanks for letting me know.

    Look forward to seeing your machine come to life !

    .Me

Page 1 of 14 12311 ... LastLast

Similar Threads

  1. FOR SALE: Axminster RF40 mill/drill 3 axis dro, Base and extras
    By komatias in forum Items For Sale
    Replies: 0
    Last Post: 04-08-2013, 10:30 PM
  2. NEW MEMBER: Have Built 2 CNC machines 1 mill/drill conversion and 1 Router/plasma from scratch
    By AGB in forum New Member Introductions
    Replies: 3
    Last Post: 06-02-2013, 03:16 AM
  3. WANTED: Small CNC Drill/Mill
    By Mad Professor in forum Items Wanted
    Replies: 0
    Last Post: 03-09-2010, 01:28 PM
  4. Is it possible to modify a drill to be an end mill?
    By HankMcSpank in forum Tool & Tooling Technology
    Replies: 4
    Last Post: 29-04-2010, 02:51 PM
  5. Drill/Mill Spindle brake (RF30)
    By BillTodd in forum Machine Discussion
    Replies: 12
    Last Post: 04-11-2009, 12:09 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •