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Member postings for fizzy

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

Thread: Cast iron welding electrodes
29/10/2019 09:15:47

I strongly advise drilling a hole either end of the crack, seems to help stop it cracking more when you weld it. You didnt say if your rods had been pre-heated, im guessing not, and therein lies your problem. They need to be hot.

Thread: First foray into 3D printing
28/10/2019 19:52:31

edge of shelf mounted er32 collet holders...starting simples!...to be continued

collet 1.jpg

Thread: VPN?
17/10/2019 01:02:02

when i was on the road i had to use a vpn, now i work from home and have good security i dont really need it as i dont remotely access my server.

Thread: Curve Cut Problem
14/10/2019 19:39:45

Hi. Im using Curve Cut to process a 2d drill sequence. Problem is no matter what inputs I use I cant get away from "will result in more than 20 passes". Its a simple drill, retract move and repeat. Any idea what im doing wrong?

Thread: Would you buy one of these collets?
12/10/2019 15:57:31

At not more than £10 from most well known UK suppliers why would you?

Thread: Question from a customer
06/10/2019 15:22:29

The way I thought about it is....if the boiler were just a strong sealed container (which it effectively is) with water in it and heat applied, the water would turn to steam, the pressure would go up. Let it cool down and the pressure comes down to exactly where it was when you started. Nothing can have changed. The only difference when using it for real is that there will be less water in it when it cools down, assuming no more has been added. Ive tested this with a smaller boiler with no clack, running the water level down whilst maintaing 40 psi driving a D10. Closing the steam valve and after cooling there is absolutely no negative pressure that I can detect.

06/10/2019 13:04:33

anyone?

06/10/2019 10:13:01

A customer of mine has the set up below, two 5" boilers set up running a Victoria powering a dynamo. He asks: as the boilers cool they suck in water via the clacks - if there were no clacks could they implode? Now we know they dont, and blowing down isnt mandatory so how much negative pressure is there? I have never experienced this but its worth asking you folks. img_20191006_090424.jpg

Thread: Has to be seen to be believed
06/10/2019 00:42:07

And therin lies my unmentioned dilema. As a professional boiler maker I see how terrible this item is - If put under pressure it will simply distort and eventually fail - it wont explode, its not a bomb and it probably will fail at 15 psi....but its a terrible thing that is being passed off as well made. Do we have a duty of care to point this out or do we say nothing in the hope that nothing bad comes of it?

05/10/2019 11:10:33
Posted by Baz on 05/10/2019 11:01:52:

What is the significance of his statement he volunteers at Hollycombe Steam Collection?

This qualifies him as an expert in all things steamy

04/10/2019 21:04:42

Seller claims it is well made - what do you think?

**LINK**

Thread: A (new to me) Tom Senior Major ELT
01/10/2019 18:34:43

Lovely machine....how are you going to move it? looks very heavy!

Thread: Water in fuel
24/09/2019 21:16:57

Studdied biochem at uni long ago...but....IPA will keep the water in (the fuel) solution and thus minimise corrosive effects. It has bveen used in vehicles up to 40% bv but this can be counter productive to longevity. It is reccommended not to exceed 10% bv in a petrol car. At 10% the RON will roughly increase by 2.5 which is good news for your engine, so its a win win realy. I dont have first hand experience of commercial addatives but its most likely just dressed up IPA...why reinvent the solution?

Thread: How many Hammers
24/09/2019 20:43:42

got nine...all used regularly depending on job.

Thread: scratch built beam engine
18/09/2019 21:03:03

Athough not an interferance fit the valve needs to be held close to the port face or air will get under it and it will never seat. Its also possible your timing is out so instead of going to compress the cylinder it is going straight out the exhaust - thick oil is always useful for starting out.

Thread: Drill running off course
17/09/2019 11:18:48

If I need total accuracy I have found it essential to use a centre drill to start and have the job clamped solid. You need a good centre pop too.

Thread: Current leakage om CNC
12/09/2019 19:17:20

Ian - it was bought off ebay from China, not a great starting point I know but there are a lot of them used in the UK and apart from me being electrocuted how they make them for the money they charge is anyones guess. Ive now earthed it and it shows varying but very low volts and almost zero amps so its going in the right direction. Nothing tripped and ours is a new house. My mate forced the two pin plug into a uk 3 pin socket - I never even saw it or gave it a thought until you kind lot prompted the questioning so big thanks to one and all.

12/09/2019 16:11:51

nope, defo no earth. I will be adding chassis earths and converting to twin and earth 3 pin plug.

12/09/2019 14:31:45

Im using the earth of the 240v socket - there is no earth pin of the plug, hence my concern.

12/09/2019 14:15:14

Update! I tested the wall socket as advised and all is as should be so I tested the spindle motor - 4 pins, 3 of which were 120v, same as the frame measured. I had a spare motor so swapped it in and ran it up. Now 70v between table and earth. Dissconnect spindle motor and 40v between earth and table. Tested resistance from plug earth to table and no reading at all. I tested wherever I could and got the same no reading. Tested continuity and nothing....now my mate set this up for me so ive never been near the wiring but on investigation I see that the cnc has a TWO pin plug. My question is, woild fitting an earth strap to everything and connecting it into the extension cable (checked that and all good) allow the current to escape or is there a fundemental problem with my machine? Many thanks

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