Here is a list of all the postings jason udall has made in our forums. Click on a thread name to jump to the thread.
|Thread: Drill running off course|
I would add.
Drill chuck run out and straitness
Though 2 .5 is not silly small(try 0.3 mm) the tool holding is critical. 0.1 run out on a 10 mm drill is sort of acceptable it's far too big on a 2.5 mm drill
And typical drill press chucks aren't made to hold small drills well. Plus what rpm. I doubt you are spinning the drill any thing like the 10's of thousands of rpm "ideal".
|Thread: Coping with form and function|
And if you haven't already take a look at is indicator build
|Thread: Q: Print Nozzle Hole Shape?|
Printers print in *all* directions...so a circle cross section will present a constant profile at all directions in the day plane.
Any other profile would give no advantage in an arbitrary angle even if a slight advantage in X or y only feed
The theoretical 0.4 mm dia nozzle would give corners of 0.2 rad. In practice the smoosh of the plastic gives a shape that is at this scale more to do with fluid dynamics than nozzle geometry.
Thus for no gain we change from simple drill/team to broach...more complex for no gain
Andrew. You are a big boy now
You need no ones permission to withdraw your contribution to the forum.
I will miss it but share your lack of need for the drama.
I come here for the engineering
If some (one) doesn't understand the contribution that "production" techneques bring to the hobbyist then more fool them.
Edited By jason udall on 18/07/2019 17:15:08
|Thread: What are these used for please?|
Item three.... knurling tool of some scale
|Thread: Electricity Supply|
Thrid time trying..very trying
Rolec charge points 32A single or three phase
Let's say 7680watts( assume cos phi near 1)
Assume 80-90 percent conversion in charger and battery
Modern showers worse than that
Tesla model 3---60 kwhr
So that's overnight
All do able
Apart from when everyone is doing it and your kerbside parking is not near your house tonight...not all have drives
And just imagine all those charging leads across the pavement?
|Thread: Which thread for T nuts|
I have some tee nuts...long version longer to spread load..
If you made long nuts tapped say 10 in the middle and say 6 mm and 8 mm either side..thus , as has been said you have the flexibility to use the thinner studs...
Edited By jason udall on 09/05/2019 18:13:28
|Thread: You tube videos of entertainment if not informative|
Here's another quirky YouTube video
This guy is fun
Bonkers but definitely fun
|Thread: Metal ball joints for 1/3 scale action figure?|
Just had a thought.
Might be a bit ott but what about a knogo(so?)
Dial guage/ indicator stand?...one I have used in the past could be see for friction and "posed"
|Thread: Lathe screwcutting|
Err just checking....when you inverse tool.....did you check tool height.... don't ask
|Thread: Precision division plates|
So the base accuracy of dividing head is matching of worm and wheel...
This first needs two threaded parts. .of the same pitch and diameter.
One is made into a tap...
The other becomes your worm.
The tap is used to cut the worm... choosing the pitch/circumference ratio desired...which regardless of the pitch will be known...we now have accurate reduction drive.
Now let's think about how you without a screw cutting lathe could generate a screw thread if CONSISTANT pitch?...
Chase a long screw thread...as fine as you can file the chaser
Now arrange to hold many pitches of this thread ( two flat plates) ..you now have a CONSISTANT but weak thread...use this to drive screw cutting for stronger thread also accurate....now make the screw thread required above....
For a laugh...Google Watt micrometer for
|Thread: You tube videos of entertainment if not informative|
Just be clear
Mods Edit. Posts about the wrong man have been removed.
Edited By JasonB on 24/01/2019 18:35:44
|Here's a link for Pablo https://en.wikipedia.org/wiki/Pablo_Cimadevila_%C3%81lvarez|
In this I see a more plausible birth date of 1976... The previous wiki suggested 1957...
I too was surprised .
He works in gold and platinum but seems to show none of the "hygiene" over swarf seen in the gold trade.
Just watch his investment casting station.. foundry is too small a word.
This guy might find the fiddling about with swarf Vs time not worth it....lucky guy
|Can highly recommend other videos by him . He does the lost wax investment casting bit..|
One of his things is to laser engrave finger prints of the customer into the inside of the ring.
Edited By JasonB on 21/01/2019 12:15:51
|Thread: PLA not Sticking to Bed|
|I use"pritt" stick other brands available and also work|
|Thread: Horn Antenna for Radio Astronomy|
|Looks about the same size as a J band one I built at uni.|
Of course at J band even though simular size much bigger in wave lengths (J band is 15 to 30 mm ) and from memory Large end was 800 mm..again from memory output was 15 mm widest so area ratio 2800 gain of around 28dB measured mid band..
Learn to weld brass for this..using beautiful Oxy hydrogen torch..
Edited By jason udall on 03/12/2018 19:06:45
|Thread: The demise of the High Street|
|So. It would seem that the policy to discourage the use of cars from towns is a success.|
Shame these same planners didn't see the obvious consequences...no cars =no drivers
No drivers= no customer for shops.
|Thread: What bearings for a submersible wheelchair?|
|Dry bearings would be the way to go.|
Because any kind of lubrication will upset risk assessment bods.oil or the hint of a risk of oil ib the pool .Even PTFE built into plastics .. would be called a lubricated solid..just avoid that discussion So choose a self lubricated solid. Though avoid leaded bronze or similar...
Edited By jason udall on 05/10/2018 21:36:00
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