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Author Topic: Chester Conquest mill power feed  (Read 23957 times)

Offline Darren

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Re: Chester Conquest mill power feed
« Reply #25 on: July 17, 2009, 06:47:53 AM »
I'd suggest threading the pillars in, turn them to set the required distance for the motor mounts and use lock nuts to clamp the bars tight to the mill.

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Offline John Rudd

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Re: Chester Conquest mill power feed
« Reply #26 on: July 17, 2009, 06:58:58 AM »
Quote from: Darren on July 17, 2009, 06:31:09 AM
Second thoughts, you don't need two fixing points as the leadscrew becomes one itself.

Bit like this




Ahhh, that seems to be a better approach...Nice idea..
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Offline Darren

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Re: Chester Conquest mill power feed
« Reply #27 on: July 17, 2009, 07:56:25 AM »
I'm sure a member on here has done it this way, well before I even gave doing mine a thought...

Can't remember who though, hopefully they'll chime in with some tips for you.....
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Offline John Rudd

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Re: Chester Conquest mill power feed
« Reply #28 on: July 17, 2009, 02:02:04 PM »
Ok,

Spurred on by Darrens comments and suggestions, I've decide to pursue this..

A slight deviation from the original scheme is required. I'm going to make a new leadscrew support plate and drill/tap some new pick up points for mounting the motor.

Why? Because I dont want to modify any of the existing mill parts...

Will you be watching?....tune next time.




More to follow...
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bogstandard

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Re: Chester Conquest mill power feed
« Reply #29 on: July 17, 2009, 02:27:46 PM »
That looks to be a very good option John.

I think you are like myself. You like to be able to put things back to how they were, just in case.

After having used power feeds for a while now, I would recommend to anyone that you should at least fit an X axis one, no matter how basic. The quality of finish you can obtain has to be seen to be believed, with no aching arms.

I used to play about with DC electrickery a few years back, and found that car battery chargers, picked up from car boot sales for a couple of squid, make wonderful power supplies for projects such as this.

Bogs
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Offline Darren

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Re: Chester Conquest mill power feed
« Reply #30 on: July 17, 2009, 03:02:33 PM »
Glad to have provided some encouragement.... :nrocks:

Like Bogs said, you will never look back once you have this sorted. The improvements are too large to be measured...

And you'll feel less tired..... :lol:
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Offline John Rudd

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Re: Chester Conquest mill power feed
« Reply #31 on: July 18, 2009, 12:50:07 PM »
Ok guys,

Some progress today in the garage..after a bit of diy in the house ( we're redecorating...oh boy what a chore that is


So,

After deciding how to progress this, I made up the shaft for the motor coupling that the driving dog is going to slide on...

Here's some snaps...

I cut a piece of EN1 about 40mm long using my trusty bandsaw...Saves a lot of un-necessary grief..

After making a lot of swarf, I have made the shaft that will attach to the worm gear..The idea being that the driving part of the dog clutch will slide on the shaft...
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Offline John Rudd

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Re: Chester Conquest mill power feed
« Reply #32 on: July 18, 2009, 12:52:01 PM »
I need to cut a keyway for a 3mm key to locate the driving dog..the dog clutch I intend to make from some 38mm 6082 ally bar that I have,but that's something for tomorrow...more pictures...

Tune in next time folks...


More to follow..
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Offline Darren

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Re: Chester Conquest mill power feed
« Reply #33 on: July 18, 2009, 02:11:29 PM »
That's a good start, once you get going it will all fall into place.... :ddb:

keep the pic's coming, I'd like to see how you tackle this... :dremel:
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Offline John Rudd

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Re: Chester Conquest mill power feed
« Reply #34 on: July 18, 2009, 02:33:09 PM »
Quote from: Darren on July 18, 2009, 02:11:29 PM
That's a good start, once you get going it will all fall into place.... :ddb:

keep the pic's coming, I'd like to see how you tackle this... :dremel:

Cheers Darren...

I need to dust off the angle grinder and fire up the gas axe....for the next stages.. :scratch: (only kiddin' )


Nah really, I think I got it sorted I might have to machine a bit off the body of the gearbox to reduce the overall profile  so that too much doesnt stick out at the lh end of the machine...
« Last Edit: July 19, 2009, 12:05:54 PM by John Rudd »
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Offline John Rudd

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Re: Chester Conquest mill power feed
« Reply #35 on: July 19, 2009, 12:04:32 PM »
Ok, A little more progress albeit slow...more diy done today...SWMBO is laying the law down  

I sketched up a few dimensions on how I thought the dog clutch was going to look...excuse the scrawl, I know it looks like something a 3 year old had drawn but I'm not into CAD drawing and it would take longer to do than machine the parts...

Also a picture of a piece of Ally bar 60mm long and 32 dia marked out for the dog's ears...cutting them will be interesting as I've never done this before...I found it easier to use the centre finder to draw the radial lines on the end...

Any advice chaps before I waste mor metal?

Are you keeping up so far? I hope I aint boring you folk...( no pun intended...this is a machining forum after all  )


More to follow...
 
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bogstandard

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Re: Chester Conquest mill power feed
« Reply #36 on: July 19, 2009, 01:37:30 PM »
Wrong John,

This isn't a machining forum, it just looks like it. It is a project forum, which is slightly different.

Your sketches are fine as they are, except you need to upgrade the the now web famous Bogstandard C-o-C (Crap-o-Cad) system.

The upgrade consists of black felt tip rather than ball pen or pencil, it makes it easier for people to see, and for the deluxe system, colours can be introduced when you have mastered the basic version.

Bogs
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Offline Darren

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Re: Chester Conquest mill power feed
« Reply #37 on: July 19, 2009, 01:55:25 PM »
John,

Take a 10mm milling cutter and run it straight through the work off set by 5mm. (so the outside of the cutter runs through the centre)

Turn work 120 deg and do the same again,

Turn another 120 deg and same again

You will now find your dog matches the part on the miller.... :thumbup:





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Offline John Rudd

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Re: Chester Conquest mill power feed
« Reply #38 on: July 19, 2009, 02:47:12 PM »
Quote from: Darren on July 19, 2009, 01:55:25 PM
John,

Take a 10mm milling cutter and run it straight through the work off set by 5mm. (so the outside of the cutter runs through the centre)

Turn work 120 deg and do the same again,

Turn another 120 deg and same again

You will now find your dog matches the part on the miller.... :thumbup:

Darren,

I thought I was reasonably versed in machining but this is somewhat of a challenge...A faint heart and all that..I'm not put off but a little confused by the statement you made...

Here's what I think....

I have six radial lines, if I align the outer edge of a cutter with line 1 and cut thru to centre, next mill thru line 3 and so on...Right?

Thing is I'm having to do this twice...so accuracy is the requirement of the day..I'll make the first then machine the second to match..

Good so far on this then ?
« Last Edit: July 19, 2009, 02:58:22 PM by John Rudd »
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Offline Darren

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Re: Chester Conquest mill power feed
« Reply #39 on: July 19, 2009, 02:55:34 PM »
John,

I think the way you are trying to do it would be quite difficult.

The way I have suggested you only have three straight cuts to make, each at 120deg.

It's very simple to do once you understand the results it will give. Accurate every time.

I'm not sure how else to explain the method, anyone else wanna have a go?
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Offline John Rudd

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Re: Chester Conquest mill power feed
« Reply #40 on: July 19, 2009, 03:05:13 PM »
Darren,

I just read in this month's MEW....

The penny has dropped I think..

If I centre the piece directly in line with the axis of the cutter, then offset by 1/2 of the cutters dia...then just mill thru'...Correct ?
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Offline Darren

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Re: Chester Conquest mill power feed
« Reply #41 on: July 19, 2009, 03:09:25 PM »
Bingo, that's the one.... :thumbup:

What's in the rag?
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Offline John Rudd

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Re: Chester Conquest mill power feed
« Reply #42 on: July 19, 2009, 03:20:16 PM »
Quote from: Darren on July 19, 2009, 03:09:25 PM
Bingo, that's the one.... :thumbup:

What's in the rag?

A power feed for a  Chester Conq...   Sealey SM25 mill like yours I believe...
A cnc router spindle motor, Clarkson sharpening  article, modifying the X1...

Pump centre for a mini lathe...Looks interesting...might make one of them..
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Offline Darren

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Re: Chester Conquest mill power feed
« Reply #43 on: July 19, 2009, 03:27:01 PM »
Pump centre sounds interesting.... :thumbup:
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