Here is a list of all the postings Russell Eberhardt has made in our forums. Click on a thread name to jump to the thread.
|Thread: First Clock in Metric|
My first clock was John Parslow's design for a 15 day skeleton clock, published in ME about 10 years ago. I started a thread on the clock here. The build articles will be available in the ME archive.
Some pictures of my build are to be found in my album. Feel free to PM me if I can help.
|Thread: Grinding tool bits|
The curvature on the front face of the tool won't cause any problem. In fact it can be an advantage as you only need to hone the top and bottom of the front face so much quicker.
To cut down a long toolbit I just use an angle grinder with an abrasive (not diamond!) cutting disk or occasionally the notch and hammer technique.
|Thread: KNEW Piercing-Saw Frames|
Never had any problems with my Eclipse frame. The ability to rotate the blade would be useful on occasions though.
|Thread: Chatter/finish problem|
Well done Steve. You are definately getting there.
The bronze (not brass) bush in the headstock is split for adjustment. The grub screw is to stop it rotating and shouldn't compress the bush. The casting the into which the bush is fitted is also split so tightening the hex headed bolt will compress the bush to take up slight wear. I would imagine that there should be a stack of shims in the slot in that casting to control how far the compression goes. Thet would allow the bolt to be done up tight without locking the spindle.
Have you seen the section on Zyto lathes on lathes.co.uk ?
The banner with the arrow is just an animated GIF image. Perfectly O.K.
|Thread: Old rule divisions twelfs etc|
It's known as a scale rule.
|Thread: Chatter/finish problem|
Agreed. It will in fact give a severe negative rake to the cutting point.
If you want to have a small flat, or a rounding, on the point it should be ground all the way down the leading edge. The top of the tool must remain flat.
Edited By Russell Eberhardt on 28/09/2021 19:03:17
You might find this link useful:
Edited By Russell Eberhardt on 27/09/2021 19:12:36
|Thread: Hello, from Spain|
Burgos, que parece un casco antiguo interesante.
Welcome to the forum Fernando. I am in France, about 25 km from the Spanish border.
|Thread: Not enoughh CO2 ?|
Back to the food shortage problem; Isn't it possible to change over to nitrogen in the packaging? I seem to remember that's what was used in the past.
Another possibility is just to use air from which most of the oxygen has been removed. A molecular sieve is used to extract oxygen from the air for medical use.
|Thread: Cutting Steel Plate.|
Plasma cutters are becoming quite cheap now:
Don't know if they will deliver to UK now following Brexit.
|Thread: Myford boring bar help|
+1 for the GHT between centres boring bar. Not only easy to adjust but easy to measure the tool projection.
|Thread: A Couple of Questions about Pipe?|
Just be careful how you ask for pipe in France!
|Thread: CNC conversation or pro made?|
I too converted an SX2P mill. Build thread is on MYCNCUK forum Here:
For motor cycle work I would consider a slightly heavier machine. I've found the SX2P more than adequate for model engineering and clock making. Total cost for the machine, conversion, and software was about €1,000 but prices have gone up since.
|Thread: Deburring Tool|
I wonder why it took so long to be granted?
|Thread: Clive Sinclar|
My preferred choice as well, no need for brackets. I still use my HP 32s or, if I haven't my calculator at hand, the RealCalc app on my Android phone.
Anyone else built one of these. A class D amplifier with a claimed 10 W output from the early 1960s. You were lucky to get 2 W out of it and it produced copious amounts of TV and radio inteference:
About ten years later I was working on low power circuitry for a portable TV using a special channel plate CRT at the Mullard Research Labs and was given a Sinclair MTV1 television to test. In one word, rubbish!
However he did do a good job in popularising cheap home computers.
Edited By Russell Eberhardt on 17/09/2021 15:07:58
|Thread: Parametric design bug|
Ian T recently posted a link to a video showing a bug in Freecad:
As I have the three packages above installed on my laptop I thought I'd try to replicate what the author of that video did on those packages. Creating the model in those packages was straightforward.
The first one on which I tried to make the change he did was Freecad. My installed version is 0.18 so slightly earlier than his version but yes it failed although in a slightly different way.
The second one I tried was Fusion 360, personal edition. That also failed as after editing the second sketch everything after that sketch disappeared.
The third one was Onshape. Surprise! It worked perfectly.
So it looks as if I will be sticking with Onshape for now. I don't like having my work stored only in the cloud and being made public but as it runs in a browser it works fine on Linux as well as Windows. I gather that a new version of Freecad is due out in December with many bug fixes so I look forward to testing that.
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