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Member postings for Ian P

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

Thread: Upload photos - canít identify which one
04/07/2020 17:22:38
Posted by Michael Gilligan on 04/07/2020 11:53:49:
Posted by Paul Lousick on 04/07/2020 11:24:07:

Michael,

I have just checked the link to your photos in MEW and they all appear as photos.

Paul

.

Paul smiley

The point is not whether or not they are photos ... it’s the ridiculous hexadecimal file-names: You may need to click on them to see the names.

The two bird pellet ones, and a couple more, have friendly names because they were uploaded from the Mac ... the others have hex filenames that are mysteriously allocated by the iPad [but are not used if, for example, I attach them to an eMail]

MichaelG.

.

’ere we go

902ba8af-d2f5-4741-a35d-4af62e645951.jpeg

Edited By Michael Gilligan on 04/07/2020 12:07:36

Only indirectly related to the jpeg naming problems on this forum but when you say 'attach' to emails (emboldened above), do you meant attached or do you mean embedded?

When I receive emails from Mac users they usually come embedded and as I use Outlook (not the latest version) the image is only really viewable if I save them first because they open in the email much bigger the will fit on the screen, yes I can pan up/down and side to side but there is no zoom, hence saving and viewing in another program.

Some Apple used do send me images as attachments which is fine. Presumably the Apple default is to embed?

Ian P

03/07/2020 23:10:45

I rename the files before I upload them.

Ian P

Thread: Lathe dogs
03/07/2020 19:13:38

I no longer have any lathe dogs as I found they never fitted or suited the things that I turned between centres.

Depending of what the job is I use toolmakers clamps or some other device like a shaft collar. When working on say, a large diameter thin (ish) wall tube with bungs in each end, I would just use duct tape to pick up the drive from the chuck body (with freshly turned centre).

Unless you know you are going to be doing work that will always fit in a dog, save your money for something else, or until you need them.

Ian P

Thread: Epoxy & Steel
03/07/2020 18:52:38
Posted by JasonB on 03/07/2020 11:19:16:

The very fine aluminium powders will give you close to a steel look when sanded and polished, you need to put as much powder into the epoxy as you can. This bowl was filled with it.

JBWeld which contains metal will dry dark grey and is hard to tell from emery cloth finished cast iron.

On seeing the picture, my first thought was that it is not surprising the bowl is empty, its got holes in it! (well you did say it was filled with powder and epoxy) I now see the filler is almost the same colour as the background (could be my monitor though)

Ian P

Thread: What a silly Vee block this one is!
02/07/2020 16:26:29
Posted by Emgee on 02/07/2020 12:56:24:

Ian

You say both blocks are ground to the same angle but do they match if 1 block is turned by 180 deg, ? if they match perfectly which ever way the pair are used it means that both sides of the V are ground to the same angle, rather than 1 side ground 47 and the other side 45 for your estimated 92 degrees.
If the sides are ground at different angles you cannot set-up by clocking between the V surfaces to find the centre.

Emgee

I only have the one block, what I meant was that both sides of this block have ths same included angle.

My guess at 2 degrees was way off. I have just measured the angle using a (presumably pretty accurately square) gauge block and feeler gauges and its nearer to half a degree. So what I would expect to be 90 degrees is nearer 90.5 degrees.

I do have some pairs of Vee blocks and each pair have matching numbers on them, presumably matched pairs.

Whilst this wonky one has no identification marks, the quality of the grinding examined closely with a strong magnifying glass looks better than an Eclipse pair which claim to be to toolmaking standards (whatever that may be).

I know these blocks are primarily for holding round stock but its not their only purpose.

Ian P

02/07/2020 12:16:33

I am sure it a manufactured product although I cannot see any identifications marks, it is ground all over and it is really hard steel, I doubt it was an apprentice piece.

Its not easy (for me) to measure the V angle but I estimate its only 1 or 2 degrees greater than 90. Both the Vee's are the same angle too.

Ian p

02/07/2020 11:21:15

I bought this single V block many years ago at a steam rally. It has been on my bench and frequently used on the drilling machine (mostly) for free hand cross drilling but also for many other tasks. Not being is as new condition its been used as a hammer, as packing in the milling machine and lots of other non precision tasks. Its about 1.5" square and 3" long.

I discovered early on that the relief channel at the bottom of the vee is not deep enough to accept a rectangular object and often though of just using an angle grinder freehand to deepen it, but have never got round to it.

Yesterday I was making a right angle optical device which has a mirror at 45 degrees in a block of aluminium. I sat the part machined item in the V (it had a big chamfer so did not touch the bottom) and found that it did not make full contact with the V faces as if the cube shaped part part I had made was not truly square. After a few moments investigation I found that the V was not a true 90 degrees but more like 92 degrees!

Why would a manufacturer make a vee block at anything other than 90 degrees?

I'm amazed that I have had it so long and never noticed this 'feature' before!

Ian P

silly v block.jpg

Thread: Installing a magnetic DRO on my VM32L
02/07/2020 10:19:18

Really crude sketch of what I was trying to suggest earlier.

Something like 3/4" x 3/4" x 1/8" aluminium channel will be 1/2" wide internally which I think will be wider than the sensor head.

I have shown the channel sticking out at the back of the machine only to show that once you know the overall length of channel required it can be positioned offset towards the rear so that the rear end of the extrusion projects no further than the back of the machine base.

Hope that makes sense

Ian P

scale mounting.jpg

01/07/2020 21:42:06

I will take a picture so I can post a sketch of what I was suggesting (probably in the morning).

I am not familiar with your machine but if I interpret what I see in the pictures I think their installation has the Y axis strip on the stationary base of the mill, and the sensor head as the moving part. Since the cable does not look particularly robust I would reverse the tape and sensor positions.

Their X axis sensor and cable also look to be vulnerable. There is no need to have the sensor dead in the middle, moving nearer to one end might allow much better routing of the cable.

Drilling and tapping holes in a machine (brand new or old ) would never bother me but I know some people are reluctant (to even paranoid) about making any modifications to a machine, In this case, unless you want to glue everything together, some holes are inevitable.

Ian P

01/07/2020 19:35:23

I'm sure you will make a better job of it than the factory have done!

There appears to be bits of old magnets used as temporary clamps holding the self adhesive(? ) strips in place, I also see the wonky looking sensor on the Y axis (has the casting a machined surface where the strip is located?). If the surface is not machined then there is a good case for fitting the strip in some extrusion. I think I would use some ali 'U' section (with the U upside down) so that the magnetic strip faces downward and the bulk of the sensor head is within the U, as in under an umbella.

Whilst the strip and sensors are probably coolant proof, oil and coolant could migrate its way into the adhesive allowing the strip to detach eventually.

Ian P

29/06/2020 20:31:57
Posted by Michael Briggs on 29/06/2020 20:02:00:

I purchased my magnetic scales from Mdro about 6 years ago. The stainless steel strip was not self adhesive, the alloy section was supplied with a round rubber seal similar to o ring material. The final part of installation was to fit the stainless strip and seal it top and bottom with the rubber insert, I finished the assembly by sealing the ends of the scale with silicone.

Mine was the same, the extrusion. magnetic strip and the SS cover strip were all supplied loose. I did fit it all as the thickness of the extrusion only added 10mm to the tailstock side of the crosslide. (Harrison M250) If I had to do it again I would investigate gluing the bare magnetic strip under the cross slide.

The sensor head and its cable (of the Amadeal kit) looks to be a bit vulnerable, I'm not a fan of the spiral metal conduit but its more robust than what is shown in the top pictures, Maybe I'm doing it a misjustice if it has a tough polyurethane jacket.

Out of interest, how much did that kit cost?

Ian P

Thread: Change to the Code of Conduct
23/06/2020 15:11:19
Posted by Bazyle on 23/06/2020 14:51:08:

Not sure if it is related but one of the things on a few forums that irritates me is the people who just bang up a post to point to their latest video. I don't know if it is to drive views for revenue or they are too lazy to participate normally with a description and a few still pictures as I ignore them.

Edited By Bazyle on 23/06/2020 14:54:25

I second that.

Ian P

Thread: Another mystery tool
19/06/2020 21:11:16

I wonder if the reason for two dials is so that it can be seen by two persons at the same time. We don't how big this thing is but I'm guessing about 8" long, because its hand held one would expect that a single dial version could be used in two positions saving the expense of a second dial.

Another oddity are the four 'feet', if its for checking the level between two surfaces or rails it would only need feet on the bottom, also if it was going to be used on rails then presumably it would have some lateral guides to cater for the crowned surface.

Is the height between the top and bottom feet significant. Maybe this thing is used with the plunger at the top sat between the ram and a platen of a hydraulic press.

More dimensions would be good, its not clear how this thing is assembled but there might be some clue if there is any writing on the dial mechanism. All in all though its an intriguing mystery

Ian P

17/06/2020 14:32:28

Is mention of 'needles' above relevant? i.e. are there indicator dials on the front and back of this tool or just the one?

The scale markings are a bit odd too in that it has four quadrants.

Is there some zero setting adjustment that does not show in the pictures, also what is the total travel of the plunder?

Still not got a clue what its purpose was

Ian P

Thread: Wot's this for ? help please
17/06/2020 14:20:51
Posted by not done it yet on 17/06/2020 13:30:56:

The clip appears to be a simple spacer, rotating with the shaft/pulley/inner race to crudely prevent the pulley bearing on the outer race. As those components are all totating at the rame speed there should not be a problem. A small diameter washer would suffice just as well.

Are both bearings properly designed to accept axial thrust, I wonder?

I think products like this one a mainly 'designed' with saleability as the first priority, performance and longevity are further down the list.

I doubt the bearings are anything special.

I bought a 'Dremel' type power tool that looked quite good in the pictures. It has a cylindrical aluminium body and is fitted with a 1/4" Jacobs type chuck, it also has a supplied 24VDC power supply with speed control all came in a nice moulded carrying case. Now its arrived I find it near useless, It has a brushed motor bonded (I think) into the ali tube outer case and the chuck is bushed in some way so that it fits the 3mm motor spindle (not removable). It has the about 3mm axial freedom in the motors plain bearings and obviously no provision made for thrust.

Yes, it a hand power tool and it was not expensive but not one I would recommend

Ian P

Thread: Mild Steel Rod in Metric Sizes
15/06/2020 11:18:14
Posted by JasonB on 14/06/2020 19:55:48:

M-machine have plenty of metric stock, Mallard do a bit.

But you may be better off using suppliers other then the usual ME ones who mostly seem to be in a time warp, Try Ringwood, or these couple of e-bay sellers BEJ or SCG

Edited By JasonB on 14/06/2020 20:05:51

Curious to know why the usual ME suppliers are in a time warp? (I think you are right, but then some aspects of the ME world are in the same time warp anyway)

If its the lack of materials in metric sizes its probably because ME's (as against home workshop engineers) are themselves mostly working in imperial sizes because that is what is on the most of the drawings. If most customers want to purchase imperial sized stock then that is what the suppliers will hold stock.

My go-to supplier is Noggin End (not too far from me so I can collect), their website shows steel in imperial sizes but I'm sure they have some sizes in metric too.

Ian P

Thread: Does anyone view this forum by first selecting a 'topic'?
13/06/2020 20:25:37

Brian G said,

"Getting back on topic, I can honestly say I have never gone to a topic and looked through the threads, instead using latest posts when I want to see what is happening, and the search facility when I want to find something out."

I'm exactly the same and only ever use 'topics' when I start a new thread.

I dont know if the following behavior is normal or whether its a setting or cookie on my PC,

If I view a thread that is still on the latests posts page but has garnered a lot more replies and maybe moved on to another page, I get taken to the end (or last page) of that thread rather than to the first unread reply. I seem to remember this forum used to take me to the point in a thread where I had read upto. I cleared the brower cache and cookies but that has not made any difference. Does the forum know what I have or have not read?

Ian P

13/06/2020 14:36:35

Its not such a hardship to see posts that have dropped of the top page, it only a matter of clicking 'next' at the top of the list.

We can hope, but its highly unlikely that any software changes will be made to this website.

Ian P

13/06/2020 10:27:46
Posted by Iain Downs on 13/06/2020 09:17:10:

I look at latest posts once or twice a day normally, though I'm the opposite of Jason and start at the top and work down to something I think I've read..

I would personally love it if the site search was improved and/or tagging of some kind introduced. I find it hard to re-discover posts that I KNOW are there because I've read them let alone find new material. There's a wealth of information here, but it's not always easy to find.

Iain

My actual method of using the forum is to open each and all of the latest posts in a new tab (well the posts I know I want to read plus any new ones). I can then read them in whatever order suits me. Very fortunately the text on each tab is the title of that posting (it wasn't always so on this forum, YCAMHIKT)

Ian P

13/06/2020 10:20:48

Jason, the post that Neil moved and which triggered my question was the one about 3 Phase in a ME workshop. Its certainly had more responses since it moved (but whether that is because it was moved or just chance I have no opinion).

Was your rivet squeezer change of title a typo on your part?

Changing Rivit to Rivit squeezer etc wont help anyone searching for rivet!

Ian P

Edit (using the fairly dumb site search feature)

Edited By Ian P on 13/06/2020 10:29:21

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