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Member postings for Roderick Jenkins

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

Thread: Changes to Fusion 360 Terms
18/09/2020 23:17:49
Posted by Emgee on 18/09/2020 22:41:18:

You don't seem to understand Rapid moves and Tool changes in a program are quite normal in many operations on a cnc mill and do not point to commercial use...

I think the point is that you can't do commercial work without them. Sadly, the hobbyist is collateral damage in the war against the freeloaders.

Rod

Thread: Diamond wheel dressing - MEW 297
18/09/2020 14:55:10

The diamond is bonded into the end of steel rod which can modified as required.

Rod

18/09/2020 12:11:58

Will this **LINK** from Axminster do?

HTH,

Rod

Thread: Changes to Fusion 360 Terms
18/09/2020 12:04:50

It seems to me that what Fusion and Onshape have done is to try and make sure that commercial users cannot gainfully use the free versions and are trying very hard to keep a free version available.

While there seem to be viable options for 3D CAD for the home user, I am not sure what the options for CAM are.

Most of Jason's comments on using his KX3 have actually been about using the Fusion360 CAM rather than, in his case, Alibre.

So, what do we use if Fusion360 CAM becomes un-affordable?

Rod

18/09/2020 09:40:53

Don't give up yet, it's still better than anything else at the price wink

You can still make STL files for 3D printing and CAM for 3 axis milling. The loss of multi axis milling is a disappointment though, I am preparing a 4th axis for my little mill sad

I think it is reasonable to assume that professional users have not been playing fair with the personal license.

Rod

Thread: "The Unique"
15/09/2020 14:23:18

Ricard Arwel is trying to identify one of these in "Scribe a line" in MEW 297

Rod

Thread: CamCalc - Manual Numerical Control
14/09/2020 13:44:51

I've had several queries recently about my current Excel version of CamCalc which produces coordinates for the milling of cams for i.c. engines.

The link is:

**LINK**

There is no need to download the Dropbox app. Choose the "Or continue to website" option and wait for the download symbol to appear in the top right hand corner.

There are sometimes queries concerning the look of the cam part way through machining. The machining coordinates are not the outline of the cam but give the path of a flat ended endmill passed across the blank at every (in this case) 3 degrees). You have to go all the way around to end up with the correct profile. The sketch below perhaps shows why this is so.

cam profile.jpg

If there is any way to lodge this spreadsheet on the site I would be happy to do so.

Hope this helps,

Rod

Thread: Wyvern engine help!
11/09/2020 20:55:53

Jim,

I'll send you a personal mail tomorrow.

11/09/2020 19:43:41

JIm,

I couldn't get the ETW carb to work on mine. I had great results using the carb I made for the Matador 10cc glow engine. Very flexible running.

matcarb.jpg

I tried to replicate this with a brass copy with the same internal dimensions as the Matador carb.

new carb.jpg

This runs ok but not as well as the Matador carb. I didn't put an air bleed on the brass version and I think it runs too rich at lower revs - something I intend to put right but I have now developed a leak on the inlet valve so some major work is required.

HTH,

Rod

Edited By Roderick Jenkins on 11/09/2020 19:48:00

Thread: Change Gear Setup
09/09/2020 17:31:31

I believe the gears available with the metric conversion set are:

28, 30,35,40,45x2,50x2,55,60x2,63

According to my calculations the following gives an exact 60tpi:

Drivers: 28 30 35

Driven: 40 50 63

Gearbox set to 14tpi

Would anybody care to check?

I don't know whether the gears will actually mesh but it is probably worth a try.

HTH,

Rod

Thread: Making a rotary broaching tool
09/09/2020 15:15:18

Hi John,

I would put a good radius at the root of the hexagon. I didn't on my first attempt and it snapped off at the transition.

HTH,

Rod

Thread: The Workshop Progress Thread 2020
07/09/2020 22:44:29

Jim,

That really is very nice.

Rod

Thread: Soldering aluminium
06/09/2020 22:05:09

I used HTS2000 for this:

do137.jpg

do138.jpg

do144.jpg

HTH,

Rod

Thread: New Moderators
06/09/2020 21:45:56

I'm sure that most of the spelling mistakes that we see are the result of using touch screens on phones and tablets and the consequent attempts from the spellchecker at interpretation, not ignorance.

Well, that's my excuse anyway.

Rod

Thread: Tyler Spiral Blades
06/09/2020 11:32:07

Spiral fretsaw blades are available from Axminster **LINK**

Rod

Thread: Myford Bull Wheel Indexing
04/09/2020 20:48:23

Hi Martin,

Good question!

rolls milling.jpg

I guess it's because the plates and sector arms etc. are normally on the Timmins head on the mill (and I don't have to wind the the handle 4 x 15 times to mill a square)

Cheers,

Rod

Edit OK, 3x15 times

Edited By Roderick Jenkins on 04/09/2020 20:53:06

Thread: Mystery post
03/09/2020 13:38:15

We had a similar looking box on a post on our 1980's built housing estate. The box was pressed steel rather than cast. We wondered about it for years but it turned out to be for the use of the postman to dump half his bagful and split his round.

 

post box.jpg

Rod

Edit - grabbed a pic from Streetview

Edited By Roderick Jenkins on 03/09/2020 13:58:55

Thread: UK availability of 1/8" Dia shank End mill/Slot drills
31/08/2020 15:48:40
Posted by Greensands on 31/08/2020 15:43:30:

I should add that the cutters should be HSS

May I ask why?

Rod

31/08/2020 15:46:36

These bits from RENNIE are available with 1/8" shanks. I've been using them in my Dremel with success. Although described as router bits I see no reason why they shouldn't be used for milling. I guess the distinction between routing and milling is largely to do with rotational speed and small bits need high speeds.

HTH,

Rod

Thread: threaded rod for table clamps
26/08/2020 22:21:36

Jon,

I made a set of studs for my milling machine from hardware shop 6mm plated threaded rod and they have been perfectly satisfactory. They are plenty strong enough.

HTH,

Rod

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