Thread: Help with drill-Mill conversion
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
23-05-2009 #2And since the spindle has no through hole i cant fit a collet chuck and draw bar,
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.
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:
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:
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
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
I plan to cut down the upright once i know the height needed
The rails are 22mm and have a solid brushing on one side and a skate bearing set up on the other side
This is the the y axis,once its cut down, with the 3mm lead screws
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?
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:
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 !
By komatias in forum Items For SaleReplies: 0Last Post: 04-08-2013, 09:30 PM
By AGB in forum New Member IntroductionsReplies: 3Last Post: 06-02-2013, 02:16 AM
WANTED: Small CNC Drill/MillBy Mad Professor in forum Items WantedReplies: 0Last Post: 03-09-2010, 12:28 PM
By HankMcSpank in forum Tool & Tooling TechnologyReplies: 4Last Post: 29-04-2010, 01:51 PM
By BillTodd in forum Machine DiscussionReplies: 12Last Post: 03-11-2009, 11:09 PM