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Member postings for Alan Jackson

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

Thread: Setting up rear parting tool properly
21/07/2021 17:55:05

This is much more rigid than the boat toolholder. The base block has a shallow slope enabling the cutting tool height to be adjusted.

Alan

rear toolpost2.jpg

Thread: Tool post height
09/07/2021 17:27:37
Posted by JasonB on 09/07/2021 11:22:31:

Alan, unless I'm missing something the holder still has no direct line of support under the tool and is over hanging from the toolpost which is the "disadvantage" people are talking about

Jason, You are quite correct but the cutting tool does not reach (cantilever) beyond the lower support so there is no moment created to make the topslide tend to flex or pivot. If I need a more solid toolpost I use a four way or triangular toolpost.

Alan

 

 

Edited By Alan Jackson on 09/07/2021 17:37:32

09/07/2021 10:32:12

MLA version QCTP with no overhang

Alan

new topslide.jpg

Thread: Uncertainty of Measurement [Global Warming]
07/07/2021 10:39:22

If they made the vertical scale more realistic say max 4 degrees then the chart would show a much less steep rise. Just what you can do with manipulated charts and figures.

Thread: Tool post height
07/07/2021 10:30:21

I entirely agree with SOD and Martin Kyte that the QCTP fitted to a typical small model engineer's lathe suffers from inherant problems, lack of rigidity due to less than perfect fits between the many introduced contact surfaces and increased cantilevered overhang from the support point below. These to reasons alone contribute to more problems than are solved by a QCTP.

Alan

Thread: Motor drive - belt, gear or direct?
21/06/2021 10:07:30

This what I did

front belt cover removed.jpghead assembly - right side.jpg

Alan

Thread: Fretting in Scunthorpe
21/06/2021 09:59:49

I bet the fuel tank is intact

Thread: Taper due to tailstock height misalignment.
04/06/2021 09:40:07

Vertical misalignment will make a small error, but horizontal misalignment will make much more error simply because the cutting tool moves in a horizontal plane.

Thread: Joe's Rocket
22/05/2021 11:37:58

He is my grandson's latest creation. When he goes into my shed he likes to invent something, he is five years old and shaping up well as a future model engineer. After he left this creation, I took the liberty to glue it together, hope he approves my input when he sees it, otherwise I'm in big trouble.

Alan

p1050551.jpg

Thread: Open Technology Lathe Idea
16/05/2021 14:53:53
Posted by Nicholas Wheeler 1 on 16/05/2021 13:26:20:

I was surprised that neither Alan's articles, nor the previous one about updating small lathes didn't create any discussion. I preferred Alex du Pre's ideas, as they're easily applicable to existing machines yet improve some of the less satisfactory features; screwcutting and power feeds in particular

So was I Nicholas, When later I placed a short version on other similar websites there was quite a lot of interest,Stange.

Alan

16/05/2021 12:41:45

In MEW300 I proposed a small adaptable lathe that could be easily changed in stages from a simple basic lathe through to a version with powered axes then finally onto a fully CNC lathe that could also be used manually or a mix of manual/ CNC as desired. The version show has a cast iron bed but this could be simplified with rectangular steel bars. I attach a screenshot. There are many more screenshots in my album.

Alan

1-Lefthand view.jpg

Thread: Masso CNC G3 - Worth the price?
14/05/2021 10:40:22

I may be old fashioned but I have never had a problem with Turbocnc with a lathe and threading. It works with an old Dell laptop which needs a printer port and operates on DOS only. I am not a professional at this, it is only home workshop and probably quite slow compared to modern versions. It can deal with curves, feed/rev, G33, G76. tapers etc. It only works with one pulse/rev but it is reliable. The screen only shows G code but you soon get the hang of it.

Alan

Edited By Alan Jackson on 14/05/2021 10:41:04

Thread: Reading glasses - frosted area
04/05/2021 10:39:48

Much as I try to be careful, I seem to have created a small frosted zone, on my prescription reading glasses, right in my line of sight. I was thinking of polishing the frosted zone away. My question is what should I use to avoid making them worse by frosting the whole lens. I realise it is probably better to just renew the glasses, but it seems a waste to throw them away.

Alan

Edited By Alan Jackson on 04/05/2021 10:40:33

Thread: Mc Donald Model tractor
18/04/2021 18:35:44

I have just started to go through this fantastic model being built.

What wonderful skills you are showing us all.

Thanks Fred

Alan

Thread: Tom Senior s head alternatives?
02/04/2021 12:59:37

Hi Buffer,

I have just found out that my article on a Tom Senior is in MEW 289

Alan

01/04/2021 18:30:23

Buffer,

I did spend some time when I first got the machines. I stripped them down to basic parts and I think I spent some time cleaning them up. I do use them though they are not just like that all the time, and the photos were taken after a good clean up. I know what you mean about the dull brown look, but I love the look of these great british machines.

Alan

01/04/2021 11:55:03
Posted by vic francis on 01/04/2021 09:08:06:

Hi I am fond on the Tom Senior m1 but mine only came with the knuckle head, and though it works fine, it has limited clearance in use,I have seen bport milling heads grafted on, or the actual senior main column raised upwards, and various other ideas such as the Bartlett milling head which mounts on arbor support ( which is just not accurate enough due to droop!) nor has it a quill feed...

I only do light work but need more clearance so any ideas appreciated! Has anyone tried these far east milling spindles? Senior heads are rarer than hens teeth, some people just buy a machine for one!

The top of m1 is not machined? So any mounting on top is a bit hit or miss! I am not moving another mill ! Which would be the best solution....

Any ideas appreciated! Or what you have

thanks vic

The top of my M1 was machined and square to the vee slides.

Alan

01/04/2021 09:54:44

I fitted a Dore Westbury head on my Tom Senior M1. It was covered in an article in MEW a while ago. It works very well and has lots of daylight.

Alan

head assembly - right side.jpg

head assembly rotated 90^ for horizontal mill operation.jpg

Thread: Home Made Rear Toolpost Issue
02/03/2021 11:48:43

Here is my rear toolpost. The base unit has a sloped surface which enables easy height setting without affecting rigidity and the two hold down bolts screw into a long tee nut in the tee slot.

rear toolpost2.jpg

Edited By Alan Jackson on 02/03/2021 11:52:49

Edited By Alan Jackson on 02/03/2021 11:53:32

Edited By Alan Jackson on 02/03/2021 11:55:04

Thread: What about a "like" button on the forum?
19/02/2021 11:43:05

Perhaps there should be a vote on a like button, Like or do not Like. Just saying.

Alan

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