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Member postings for Baldric

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

Thread: Lathe Move
09/09/2021 19:27:47

I used this guy for a Bridgeport move

**LINK**

Thread: Spiral Milling
18/06/2021 11:36:15

I did a similar job a couple of years ago, a 2 start square thread, I used gears rather than belts, but I did need to get a big gear ratio, I had to make the "banjo" and I 3d printed the gears as it was a one-off to make the part & 2 taps.

2019-09-29 17.53.10.jpg

Not sure why this image is on it's side, it is not on my PC.

2019-09-29 17.52.58.jpg

2019-09-29 17.52.20.jpg

The cutter is 1/16", I used the handle on the dividing head to driver the table, the return was made & faster easier by making an adapter to use a socket on the nut driven from a drill.

Baldric

Thread: GPO test meter fault
14/06/2021 10:49:17

It looks like this could date from the 1930-now, so an idea of age would be good...

**LINK**

Baldric

Thread: Ropey Radio Reception?
08/05/2021 09:07:27
Posted by John Haine on 07/05/2021 11:31:34

DAB can't fix this problem because it simply transmits the audio stream in which the pips are embedded. Until someone develops a negative delay line it's a laws of physics problem. There may be time signals embedded in the DAB multiplex but receivers don't seem to use them if so. (Actually there are only a few DAB chipsets so not much variation in the low level capability between sets.)

About 14 years ago I was involved with a project associated with BBC radio, there were plans to insert the PIPs early in to the digital feeds, but I believe it was dropped as not only is it going to depend on the transmission medium (FM/DAB/Freeview/Freesat/sky), but also what the receiver does with it. At about the same time listening to radio via the internet was becoming more wide-spread, that added a whole host of other variations. There is also the route the signal takes to an FM transmitter, that will probably be digital, with minimum delay, I used to here on my radio it switch from one transmitter to another as there was a small repeat of part of a word.

If you want accurate time I would suggest PC time, if set from an external source, or AM/FM radio.

Also of note there was talk of stopping the analogue transmissions, but I am not sure what happened to that proposal.

Baldric.

Thread: Issues 303 stepper driven rotary table with hobbing capability
02/05/2021 12:24:06

John,

I like that idea for the sensor, I can probably do something similar.

I have a 6" rotary table, I think it is a Vertex one, I also do have an Elliot 5" universal dividing head I could use, but I would then need to consider the work to add a stepper motor to this.

Regarding the gears, they are 14DP, with 111, 95, 82, 44, 31 & 15 teeth, if this is not practical using the rotary table for hobbing I may have to do one tooth at a time. I would be interested in your thoughts on the suitability of the equipment I have available.

Before starting work on any of this I will need to also look at the cost & availability of such a hob.

Baldric.

02/05/2021 11:36:52

Thanks for that Joe, I will start to look in to all of that.

Baldric.

01/05/2021 16:29:56

I would also like to thank Joe for highlighting the Bresenham algorithm, I was just working out how to resolve the issue I had with my existing steeper driven rotary table where I could end up with an error. I have come up with something similar, in that for each division, I will take the number of steps required for a full revolution, then work out the difference between the n and n+1 divisions, and use that to advance the table, rather than just using the number of steps divided by the number of divisions. Using this method does mean that after 1 full revolution the table should be exactly where it started rather than a few steps out for some numbers, with the "extra" steps added regularly.

Baldric,

01/05/2021 16:19:21
Posted by Joseph Noci 1 on 30/04/2021 20:48:55:
Posted by JasonB on 30/04/2021 18:54:00:

Joe will hopefully see this thread and respond, he also did a thread about it here

He saw and here he is...

Always a trade off with articles like that - to make it a DIY construction article would probably occupy two or three magazine editions and would perhaps tend to bore most folk. It's not really fair on subscribers to pay for the magazine and have heavy, possible uninteresting content, occupy many issue perhaps? I would not know..

Anyway, I don't really see the need for frustration - as Jason indicated I did do some posts which show in some detail what you would be letting yourself in for if you wished to build something like this, and I generally am around these forums and happy to assist any wishing to give it a try! Paul White, another UK forum member was actually the motivator for this - to build an electronic hobber, and so this was born and Paul did build and use it.

I can provide circuits, C source code if you wish to modify/roll your own, or binary code to you requirements ( within practical reason!) etc. My Wife is the software boffin behind all this. We do not use the Arduino development / compile, etc environment - it's to tacky for our way of working - so we use open source tools on a PC. The code runs on an STM32 microprocessor, on a NUCLEO module - very similar to the arduino type modules, but 32bit and much faster. So all interested let me know how you wish to go! All/most of the bits should be available from RS, Digikey and Mouser, and other favourites you may have.

The unit is not complex, but you need to be able to read a circuit, solder some electronics, deal with LCD character displays, etc, albeit at basic levels.

Can be via email, or on the forum, whatever works and very happy to help.

Joe

Joe,

Thanks for replying.

At the moment I am considering how I will make the gears I require, buying a single hob does appeal rather than having to buy several gear cutters and cut all the teeth one at a time, either-way also adding a power-feed to the X-axis would sound sensible to me as well.

I spent 12 years working in TV studios, maintaining. repairing & modifying the electronic kit, so can do the electronics, I now write software in C++, just I use Visual Studio, so that should also not be a problem in making any changes that suit my needs, so anything I can get from you will be a great starting point for me. The bit I am not so familiar with is some of the issues associated with interfacing the hardware to the software

Baldric.

01/05/2021 16:10:12
Posted by JasonB on 30/04/2021 18:54:00:

Joe will hopefully see this thread and respond, he also did a thread about it here

Thanks, I will read through that.

01/05/2021 16:09:52
Posted by Andy Carruthers on 30/04/2021 18:46:51:

Have a look here:

https://www.worldofward.com/rotarycontroller/overview/

Have just purchased one, simply don't have time to figure everything out myself...

I don't think that does gear hobbing, and I made an equivalent of that from MEW 249, here.

30/04/2021 17:51:39

I found the article on using a stepper motor with a rotary table to hob gears interesting, I will need to make some gears for my 3" Foden and had been wondering about doing this. I have already driven my rotary table using a previously published article with an Arduino and I am generally happy with that, but don't think it has the speed to cope with hobbing. What seems missing is any link to the code used in the article, is that available anywhere? I did try using the search on this site, but it only titles that did not seem to match.

Has anyone done this using a Bridgeport, if so any tips on where to mount the sensor? I have an older step-pulley head, that I expect to run at it's lowest speed.

My rotary table has a 90:1 gearing, I appreciate this means the stepper will have to work harder, but I guess I can reduce the micro-stepping to compensate for that.

Thanks in advance,

Baldric.

Thread: Dickson holder storage
19/02/2021 21:39:11

Oldiron, I would have had to get some material in to do that job or cut up a largish sheet, so for me it was easier to design & print, also a good exercise in CAD, even if a simple one. Before I moved I did use a aluminium u-channel screwed to the wall, they then hung of that, it worked but 11 holders took up quite a bit of room.

Baldric.

19/02/2021 21:35:39
Posted by Chris Evans 6 on 19/02/2021 19:45:24:

Like Oldiron mine are on a shelf bolted to the splashback. Trouble is the shelf is also handy for lots of odds n sods like boring bars and threading tools. All equals an untidy mess due to lack of personal discipline.

My Boxford has a shelf, but not a very long one, it normally has a few bits on it, but not room for 11 holders.

Baldric.

19/02/2021 21:33:44
Posted by Oldiron on 19/02/2021 18:02:51:

The 3D printed hangers are a great idea. I believe there are a lot of designs on Thingiverse that can be downloaded for the 3D printer. A 3D printer would be handy but do I really want to get into another tech stream at my age?

I need to find someone with a good 3D printer locally and have some made.

regards

Edited By Oldiron on 19/02/2021 18:03:14

I did look on Thingiverse, there was nothing that I liked, there are some there but I felt they would take up a lot of wall space as the holder would be along the wall rather than perpendicular to the wall. The are a few designs to hold indicators in the toolpost though that look interesting.

Baldric.

19/02/2021 17:42:09

I have built a workshop but didn't really want to just put my Dickson tool holders on a shelf, I had seen various designs & a supplier of a pre-made one, then a friend pointed me in the direction of a 3d-printed holder that sits on a bar. Using this as inspiration I thought I could design something that I can screw to the wall. I decided I would make them as individual items so I can just print more as I want. Here is the end design.

tool holder.jpg

I printed one, only to find that not all the dickson (style) holders were the same, so some didn't fit. A quick change and here is the first one attached to the wall.

20210219_170434.jpg

I now need to print another 10, at about 2 hours each it will take a time! 2 more are printing as I type, I could have got it to print more in one go, but I don't want it running overnight really.

Having done this I may make more special storage for other lathe accessories, such as allen keys, chuck keys and chuck jaws, all good for learning 3d-cad, this time may be Solid Edge so I can compare that with Fusion360.

For those interested the design was complete in Fusion360, the hardest part was working out how to put in the screw-holes perpendicular to the back, then put the counter-bore from the front, but not at an angle. After a bit of looking at web-pages I realised what I needed was to create a plane from the back, offset forward, draw on that and make holes from there, simple once I realised that.

Baldric.

Thread: Plans for updating the archaic forum?
17/02/2021 06:47:56

I thought I would add my comments having looked at the flying site, and using other forums.

If it ain't broke don't fix it. If I use a mobile phone to look at this site I have to rotate the phone & zoom in a lot, as I often have 10 minutes only that is how I view a lot of site, because this site is bad it means I don't visit very often. The new site seems to solve that issue.

The Modeleng proboards site has got all the features I have wanted, I can see a list of the topics that have new posts, I can click a button on that list to take me to the first new post & I can be logged in on multiple devices so don't have to login each time I visit. As I have not signed up to the flying forum I can not confirm it has all these features, but as it looks like a modern bit of software I assume it does.

Colours, I like the current colours, on the other model eng forum I am happy with the default colours, with a black background, but as a member I can go to my settings and have options, that is good for those that have different requirements.

Request for a test, isn't that why it has been applied to a single forum first, to gather feedback? I would suggest that if anyone wants to comment they should look at the flying forum and give it a try. I would assume there was some prior testing with a few people. As a software developer I am also aware that if you ask 4 people what they want you will probably get 5 opinions, so trying to please everyone will not be possible.

On the whole the changes look OK to me as far as I can see without signing in, so that means I will visit more often, so I guess that is a win for the advertisers who pay to keep the site running.

Baldric.

Thread: New (Old) mill R8 problems.
05/07/2020 17:46:49

Just incase you were not aware, I believe R8 collects are designed to grip one size, therefor do not compress much, so don't expect to use a 1/2" collect to grip a 12mm tool, where as with the ER system you could do this if needed.

My mill still has the pin and I have not had a problem with any tooling, but as most of it came with the mill I guess the previous owner may have solved any issues and I may have been lucky with the couple of tools I bought.

Baldric.

Thread: Gantry crane in MEW - probably
23/06/2020 15:38:49

Thankyou Neil, it was the one in issue 279 that I was thinking of, I had it in my mind it was earlier than that for some reason.

Baldric.

23/06/2020 14:41:44

I thought that I read an article about fitting a gantry crane in a workshop, probably a garage, in MEW, however I can't find it in the on-line indexes. Did I dream about this or was it in some other publication?

Baldric.

Thread: Moving milling machine
11/06/2020 17:23:12

Just an update, a bit later than expected due to the move delays for obvious reasons. In the end I used this firm **LINK**, the lorry may have been overkill, but it made lightwork of the job, I would use them again if I needed to do another machine move like that.

Baldric.

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