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Member postings for Michael Horner

Here is a list of all the postings Michael Horner has made in our forums. Click on a thread name to jump to the thread.

Thread: Acme Die
16/03/2014 12:48:58

Hi

Check out HPC they do an 8tpi ACME lead screw **LINK**

Cheers Michael

Thread: What did you do today? (2014)
04/03/2014 18:22:44
Posted by JasonB on 03/03/2014 07:43:25:

Michael if you look at the first picture you can see the clamp barrel inside the hole which has a scallop out of it to match the hole. As the orange handle is tightened it pulls the brass barrel to one side and locks the spindle.

J

Hi thanks for the explanation Jason.

If I am lucky I will be to use the original barrel lock which resembles the one depicted by Nicolas Farr.

The casting has a restriction at the hand wheel end which will need boring out and I will need to move the retaining screw holes to accomodate the larger diameter hole.

Cheers Michael

03/03/2014 07:26:52
Posted by John Stevenson on 16/02/2014 22:17:53:

Well attacked the tailstock this evening.

This is what took the time

That square block replaces the round keeper, it's bored the same size as the barrel, has a fixed key fitted and a lock.

These are the bits that go in.

On the left a dummy barrel, made out of stainless because I had it in the right size, keyway nearly to the end so it can slide thru the square keep block but not come out because of the key and bushed to take the screw shaft extension.
One bush is at the end, that's the hand wheel end and the other bush is 50 mm inside because of the screw that sticks out.

This dummy barrel is not connected to anything, it slides in the square block and pushes on the original barrel. The screw extension is just that, the outer end mimic the end of the screw where the hand wheel fits and the other end is threaded into the screw.

This is the only part that has to be modified from original in that it has to be secured to the original screw either by drilling and pinning or loctite. I used loctite but if push comes to shove you can break the seal.

This is it assembled.



Linkage isn't finished.
It need a clamp block right at the far end next to the handwheel to take that bar that has P [ pivot ] on it and C [ clamp ].
There is a C on the end of the dummy barrel.

To use you unlock the orange lever that the lever feed will push the barrel out nearly 6" pull it back, lock the orange lever and you get 4 1/2" of screw feed.

However you can use both together if you want screw in on fine feed whist drilling, lever out to clear chips, lever back in, lock, and carry on using the handwheel.
or lever in to get up to the job, lock, then hand wheel, or if it's just fast drill use the lever feed on it's own.

Not a new idea, Clausing had a similar arrangement but it means buying a new barrel and screw so spendy. This way need no modification to the machine [ except for the dab of loctite ] and nothing has to be to microns, no taper to cut in fact it's that agricultural I did the lot with now drawings at all.

max usable travel.

Hi John

I like this idea and want to do it to my minilathe. Is the clamp on an excentric?

Cheers Michael

Thread: BOTTLE ROCKET
23/02/2014 13:43:25

Hi Jacob

If your allowed too have a ground based first stage, say a big spring so this provides the lift off as this "kick" dies away your second stage then takes it to its destination!

Cheers Michael.

23/02/2014 09:20:56

Hi Jacob

Make it look like Thunderbird 1, and as the forward velocity drops off the wings come out to give lift!

Cheers Michael.

Thread: What did you do today? (2014)
02/02/2014 12:11:53

tap driver.jpg

Built myself a tap wrench driver because my tailstock one I bought didn't cover all the sizes of my taps. I bought the tap wrench for £3.60 so wasn't going to make that.

Cheers Michael

Thread: Noise Insulation/Suppression
26/01/2014 18:37:03

Hi RJW

I have a V twin compressor with direct drive motor and over a short period of time it loses pressure, do you know if this is a built in feature or an air leak?. A guy was telling me it was designed in.

Cheers Michael

Thread: Rotary Laser centre finder
26/01/2014 11:04:44

Hi

If you have to drill a hole in the job, couldn't you use a ball bearing?

You'd probably want to to stain it black otherwise you might get bejazzeld!

Cheers Michael.

Thread: Hovercraft......
25/01/2014 20:44:47

**LINK**

Hi Rik

You could check this link out. Saw it on the telly recently but it could be years old. Couldn't find the date on the web page.

Cheers Michael.

Thread: Is software a tool ?
12/01/2014 12:41:18

Hi Mike W

"The computer is the tool . The software is what makes it do useful things ."

So what kind of tool is a computer without out software/firmware - Paper weight / Toaster. Door stopwink

It's a bit like a ratchet without a socket as separate things there not much good but together very useful tool!

From my above anology the software is a tool also.

Cheers Michael


12/01/2014 09:46:49

The E-dictionary says yes!

In my day job I use a progam called TSTOOLS. This can read sensor outputs calibrate said sensors, load firmware into the modules that make up the machine, etc. So helps me determin what is wrong with a machine and hence fix it, sometimeswink 2 It has no relavance to MEW or ME.

As someone has mentioned apps that calculate say trig functions are a useful tool for HWE but I doubt you would want to know how the software worked just were to get it from.

Cheers Michael

Thread: Inverter Wiring
12/10/2013 08:25:06

If you use the screen as an earth then I don't think it is a screen anymore. Something about circulating currents. I seem to remember you only fasten the screen at one end for that reason.

HTH

Cheers Michael.

Thread: Three JAW CHUCKs
11/10/2013 18:29:57

Hi

The ones from Amadeal do, they also sell the spindle as an up grade. SPG sell them as well but out of stock.

Cheers Michael

Thread: Tool Height
17/09/2013 20:46:09

Hi David

Have you considered a tangetial toolholder, made or bought. The Michael Cox design is quite nifty. I made one for a cnc turret I built so I didn't have to mess about with shims. I think Rik Shaw made a modified one with a stronger clamp. To set the height you just move the tool bit up or down to the desired height.

Cheers Michael

Thread: Workshop comms
22/07/2013 23:19:55

Rik

It might be worth looking on the Maplin website for the small "Walkie Talkie" type radios about 30quid a pair. They are available from a lot of places apart from Maplins at all sorts of prices (often cheaper). They are battery units and are truely "wireless" as they are radios and you don't need a licence for them.

Keith

She might learn some new words! tried that idea and the local kids had them as well!

Michael

Thread: Crobalt Tool Alloy
14/07/2013 19:47:01

Hi Russell

It is, about 5% I think. The Crobalt is 50%.

Just wondering if there is any real advantage in the Crobalt, if it held its edge for longer there might be. John is saying he didn't find that to be the case, I have enough M42 to keep me going for a few years at my current useage.

Michael.

14/07/2013 17:54:23

Hi Just made a Tangential tool holder along the lines of Michael Cox's design, just modified the bit clamp, don't know if it will perform any better. It's to go into a tool turret I made for an ORAC lathe. I don't have a forced lube except what comes out of a can of WD40. Does any know if this Crobalt alloy will perform better than M42 tool steel? It's £18 for 2.5"

TIA

Michael

Thread: MEW 203 and motion controllers
28/05/2013 21:30:06

Hi DerryUK

Had a read of the article and I think what it is saying a command is sent to the contoller and the only function of the controller is to execute that command it's a bit like what he says about the separate display card, it takes the strain of the MPU. The controller may have a buffer(memory) so it can take more than one command at a time. It would come into its own on a slow PC or laptop.

HTH

Cheers Michael.

Thread: Why won't this work...or will it?
28/05/2013 20:23:18

Hi Jason

He does mention a digital angle gauge. Not sure why he would find a DRO cumbersome! Might be a pig to fit but then that's it. Surely? Is he after something like a mini GPS? If so I think to get the accuracy it would be out of the price league of normal model engineers.

Cheers Michael.

28/05/2013 16:57:36

Hi John

Arn't you describing CNC?

In Mach3 You can type in your coordiates from the keyboard and the cutter will move to those points. The accuracy depends on how much you want to spend. A basic CNC machine is more accuate than I am on a manual machine.

Cheers Michael

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