Author Topic: home made mill  (Read 11535 times)

Offline krv3000

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home made mill
« on: June 19, 2016, 04:55:05 PM »
hi all not posted much as I ant bin up to out but john got a X.Y table of a chap sos john did give me your name but I have forgotten it so back to the plot went looking on the bay and came a cross a emcomat 7 milling head all the way dawn the other end of the country  I won the bid so me and me friend  David went to pick it up set off at 6 in the morning got back 6 at night any way I need to make a base plat a bit like a angel bracket to put the two together right sum pics   

Offline DavidA

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Re: home made mill
« Reply #1 on: June 19, 2016, 06:43:54 PM »
Hey, I have exactly the same parts. The Emco is bolted to the bed of my Denford Synchro and the x,y table is still in the box, unused since the day I bought it about five years ago.

I was considering doing what you have done, but never got around to it as it seemed a lot of work as I could just use the lathe cross slide. However tonight I was looking at the lathe set up and thinking that the traverses were rather limited.

Now I need to do the same as you.

Dave.

Offline micktoon

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Re: home made mill
« Reply #2 on: June 19, 2016, 06:52:00 PM »
Hi Bob , looks good so far , looking forward to seeing the project progress , cheers Mick

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Re: home made mill
« Reply #3 on: June 19, 2016, 11:22:38 PM »
Very nice start KRV3000. Its to bad that pond is so wide and expensive to ship across, have a 20 X20 X 1" alloy aluminum plate in the shop just waiting for a project.

Cheers
CB

Offline krv3000

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Re: home made mill
« Reply #4 on: June 20, 2016, 06:06:39 PM »
hi all thanks for the comments thanks al so for the offer of sum plate but that's one thing I have a good supply of I work as a tool maker and thick plat is never a problem any way got to work this morning and had a good rut at watt was lying a bawt got an old  base plat 30mm thick so cut it in to lumps and set one of the apprentices to start and mill them to shape yes I no its cheating but it learns them haw to clock big lumps up any way tonight first mod  the handles on the X and Y was to say the least shocking m8 hole but the shaft of the screw went from 7.6mm to 6 mm and the hed's was no beter   so mad new ones up the next thing on the list is to fit locking handles to the X and Y tables and on the mane column right pics     

Offline krv3000

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Re: home made mill
« Reply #5 on: July 02, 2016, 03:42:38 PM »
hi all things have bin going slow with the mill I striped out the head all of the bearings need replacing one shaft badly scored made a new one
went to work this morning did watt I had to do then set to on the two plats that will be the upright ruft  them dawn to size then grind them to the proper size plus sum pics of the mashean  shop right pics 

Offline krv3000

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Re: home made mill
« Reply #6 on: July 02, 2016, 03:45:59 PM »
more work shop pics

Offline krv3000

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Re: home made mill
« Reply #7 on: July 08, 2016, 05:35:08 PM »
well can any one help the draw bolt on the mill is m8 but the MT2 sleeves have a m10 thread in them  their is sum sort of thread adaptor that goes ether on the draw bolt or in to the tooling can any one help with pics of the item I need to make up will post sum more pics soon   

Offline Steamer5

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Re: home made mill
« Reply #8 on: July 09, 2016, 02:43:12 AM »
Hi Krv,
  Here ha go! Hope the sketch is clear enough, if not please ask!

Cheers Kerrin
Cheers

Kerrin

Offline nrml

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Re: home made mill
« Reply #9 on: July 09, 2016, 06:42:22 PM »
Those workshop pics are tool porn :drool:.

Offline krv3000

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Re: home made mill
« Reply #10 on: July 10, 2016, 03:48:35 PM »
hi brill thank you  the mill base is al most dune made two uprights to stand the base plate on to all I need to do gnaw is make two plates fore the front and back right pics and more pics of the woks tool room and I don't no if you all can remember me getting a tool box of john well that's the one with big boy on it   

Offline krv3000

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Re: home made mill
« Reply #11 on: July 25, 2016, 04:27:10 PM »
hi all not much bin happening with the mill its all back home drilled two holes for the locking handles and started to pant things up pics     o and a few hols to tap for a home made angel bracket 

Offline tom osselton

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Re: home made mill
« Reply #12 on: July 25, 2016, 09:03:56 PM »
Your doing a great job of it!

Offline vtsteam

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Re: home made mill
« Reply #13 on: July 26, 2016, 09:47:12 AM »
Paint looks really nice, Bob. Whole project does!  :thumbup: :thumbup:
I love it when a Plan B comes together.

Offline awemawson

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Re: home made mill
« Reply #14 on: July 26, 2016, 11:13:21 AM »
 :thumbup: Coming along nicely Bob  :thumbup:


Steve, good to see you back in circulation  :beer:
Andrew Mawson
East Sussex

Offline millwright

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Re: home made mill
« Reply #15 on: July 26, 2016, 03:44:31 PM »
Nice to see it all coming together now Bob, Its looking good.   :clap: :clap:

John

Offline krv3000

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Re: home made mill
« Reply #16 on: August 01, 2016, 01:55:33 PM »
hi all thanks for the comments all but dun gnaw as im on holiday I have had sum time to put the z and y bit on the base I had to make sum washers for the 4 fixing bolts there 5 mm thick od 32 mm with a 10.2 hole then just put it all back together and clocked the table in so its running parallel with the column run out at both ends the same with a dip in the middle I need to make two bushes for ether end as their is to much play in the end brackets and to drill them to put oilers in the next big job is I need to make a spacer block  to bring the head of the mill to the centre of the table  right pics  first pic of the dti is in the centre then next left then right 

Offline DavidA

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Re: home made mill
« Reply #17 on: September 14, 2016, 08:20:37 AM »
As I mentioned above, I have the same milling head as Bob, but mine is, at the moment, bolted onto the back of my lathe.

Before going the whole hog and emulating Bob's set up with the X,Y table, I decided to try using it as it was originally intended; on the lathe.  I haven't done this before as I have the Micro Mill for my small jobs.

So, I removed the lathe topslide and found that I could just about fit my small milling vice to the top of the cross slide if I drilled and tapped some new holes to fix the hold-down clamps.

With this done, and the vice mounted I did a trial run. Milling the surface of a 15 mm wide aluminium block.

(start simple). I was using a 10 mm cutter.

Then I discovered a snag.

You can't lock the cross slide.

Locking the saddle will prevent most of side to side motion, and tightening up the slide gibs helps.

But you encounter a problem.  The back lash in the cross slide lead screw.

If, say, you do a cut along the rear of the job (left to right), and you are conventional milling, the cutter will pull the job towards the rear of the machine.

If you now try to repeat the operation along the front (right to left), the cutter again pulls the job. This time towards the front.

Come to think of it, it will also do this when you are milling along opposite sides of a job in the which ever way you are cutting.

Short of fitting some kind of clamp and always ensuring that the backlash is taken up in one direction I can't see an answer to this. There will always be backlash in the lead screw, and unlike the gib slides, it can't be taken out easily.

I posted this here because it may be something Bob has an answer to.

Dave.

Offline seadog

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Re: home made mill
« Reply #18 on: September 14, 2016, 09:08:33 AM »
I fitted an extended screw in place of the standard gib adjuster and fabricated a small lever. I can now lock my cross slide. This is on a Boxford.


Offline DavidA

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Re: home made mill
« Reply #19 on: September 14, 2016, 12:39:53 PM »
Seadog,

I'm considering doing the same thing. My lathe is a Denford.

Thinking about it, I am still going to have to be very careful when moving from side to side as, even if I lock the gib when on one side, I will have to unlock to move to the other side. And will lose my 'zero' in the process.




Dave.

Offline krv3000

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Re: home made mill
« Reply #20 on: September 17, 2016, 04:39:50 PM »
 yep seems to be a conmen problem im on hold at the moment I have got the lump of bare to make the extension to bring the mill head over to the table just had no time to set it up to bore the male fitting will get their soon
 

Offline DavidA

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Re: home made mill
« Reply #21 on: September 18, 2016, 11:36:18 AM »
Bob,

Measured up the mill head and there is only 6 1/2" between the front of the column and the centre of the quill. By the time you have added a vice there  is only about 3" of movement in the 'y' axis available before you hit the column.

I can get around this to some extent by swinging the head around to about 45 degrees; then the cross slide will miss the column. This, of course, then limits the movement in 'x'.

You can't win.

I considered fitting the shaft between the two beds ( the x,y) sort of in the 'V' instead of at 90 degrees alongside the 'x' bedway at the rear as normal.  But it wont really help.

So, like you, I am going to devise some way of bringing the head assembly out over the bed.

That's for later.

Keep up the good work, It helps me to see someone else is doing the same thing.

Dave.

Offline DavidA

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Re: home made mill
« Reply #22 on: September 30, 2016, 03:56:30 PM »
Bob,

It dawned on me a couple of days ago that if you turn the base of the column around so that the bolting on flange is around the back you could gain a bit of swing out over the bed.

Dave.

Offline krv3000

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Re: home made mill
« Reply #23 on: September 30, 2016, 05:36:48 PM »
er you have lost me it is all redy bolted on the back will take sum pics to show you any way as at work tomorrow so will be starting on the extension to put the head over the table  so I will be posting pics if I had a fixt steady for me compact 8 then I wood have dun this at home. and john is going to  have a bit play with his new mill two mill out the two slots for the nuts to go for tinting it to the coelom head   
don't like doing things at work as to me its cheating as a lot of people on hear only have watt they have in their home work shop   and not a fully kited out tool room   

Offline krv3000

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Re: home made mill
« Reply #24 on: October 01, 2016, 03:05:36 PM »
hi all as promised the bare stock was spot on  100mm so I had to put sum weld on it to make it bigger  but before I did that I marked out the centre for the running centre to go in to then I lade dawn sum weld the finish size is 100 mm but the bar was not even so did this  to give me a nice finish I then set it up in the lathe and just turned it dawn to 100 mm there is sum holes where I have not put a nuff weld on these will just be field in as its not critical as it will be panted   then set up the fixt steady to bore out the end it needed to be 15mm deep by 70mm wide all dun the next step is to get it to john's to drill and put the two cut outs in for it to fit on to the Colom head right pics