New build with recycled parts on a ridiculous budget 120cm*60cm work area

[Clive S]

I was told if you tap 1 phase of 3 to get 230v mains you mustn't have a load on the other 2 phases and the load should be balanced over all 3 phases.

This is not true you seem to be contradicting yourself in domestic wiring they only take one phase into the house and the next house would get another phase etc this is so the 3 phases are balanced. The same in a factory the phases need to be balanced as far as possible.

The danger can come in domestic use if a guy runs an extension lead to his neighbours house its possible to get the high voltage in fault conditions

[Desertboy]

This is not true you seem to be contradicting yourself in domestic wiring they only take one phase into the house and the next house would get another phase etc this is so the 3 phases are balanced. The same in a factory the phases need to be balanced as far as possible.

The danger can come in domestic use if a guy runs an extension lead to his neighbours house its possible to get the high voltage in fault conditions

Thanks for the reply, I actually meant to write
"1 phase of 3 to get 230v mains you mustn't have a load on the other 2 phases otherwise the load will be unbalanced over all 3 phases." What they were stressing to me was that it was ok for the load not be balanced if I used only 1 phase but if I used all 3 phases (Say 3 different single phase circuits) then it should be balanced. But I have no idea if I was fed bollocks lol.

I think I am misunderstanding balanced but I'm also repeating what I was told by an electrician. I was only talking from the POV that I have a 3 phase input to a 5 wire socket and I take 1 live, the ground and the earth. Not a home situation if I was doing this at home I'd run 32amp Twin and earth from spare slot on the board and add the correct breaker. I've done this before and it cost me ~£45 last time for the wire and breaker, my house hasn't burnt down yet lol.

I'm not sure I understand how my neighbour balances me because one side house has been empty for a year and the other side they work nights so I would think the 3 phases are not balanced unless balance isn't load which is what I assumed it to be. Also what happens when it doesn't divide by 3? When I was thinking of balance I was thinking it needed to be equal draw on all 3 phases a once which is how 3 phase motors work of course.

I'm not an electrician lol but interested and would like to improve my leccy skills especially as the last electrician I had at home I ended up having to fix his dodgy wiring lol. (Patched my Electric oven cable in the wall with 13amp!) Trust a trader my fucking arse.

I just realised reading your post that I need to check which phase is which in the fuse box before I wire this up I think a volt meter should be the right tool for the job. I'm assuming they put the different phases on different rows.

[Clive S]

Thanks for the reply, I actually meant to write
"1 phase of 3 to get 230v mains you mustn't have a load on the other 2 phases otherwise the load will be unbalanced over all 3 phases."

You have to remember that it is not just one house but many so there are many on each phase and they will average out.

For three phase to run correctly they must all balance out. (I am not having go)

Regarding the oven I believe there are some that run from a 13A socket these days.

[Desertboy]

You have to remember that it is not just one house but many so there are many on each phase and they will average out.

For three phase to run correctly they must all balance out. (I am not having go)

Regarding the oven I believe there are some that run from a 13A socket these days.

Not mine lol I have the manual for it recommends a minimum 30amp also the cable I only discovered the wiring because the smell of plastic burning coming from behind my tiles and when I got the melted charded mess out I was glad it was under tiles and not plasterboard lol.

I want to learn Clive so tell me where I'm wrong I need to be educated lol as my teacher said you don't learn anything by being right it's only by being wrong that you learn ;)

I assume that if I only use 1 phase out of 3 then I need not worry about balancing at all? I want to wire the 3 phase socket as it's easier to convince my dad to let me fit the socket if it's 3 phase.

Also I have the 3 phase stuff and I want to buy a 3 phase plasma cutter so it all makes good sense to me if it's safe of course.

[Desertboy]

This will set me back another week but after extensive talk to someone in the know I've decided to pour epoxy resin inside my aluminium extrusion (Gantry only for now).

Probably this stuff
http://www.mbfg.co.uk/epoxy-resins/p...ble-resin.html

Mixed at this sort of ratio
50% aluminium filler powder
35% Epoxy
15% Carbon fibre powder

Fill these cavities


I've found out that epoxy resin generates heat in curing which would cause problems but I will bolt the gantry mount on one end fill the extrusion up leaving another space to bolt the top plate on tight. Then I will put the whole thing in a water bath for overnight to cure evenly.

From discussions with the fibreglass guy it'll be stronger than aluminium but weaker than steel for ~4kg's of weight added to the gantry should make it much more rigid.

Will make the gantry mounts with 25mm ecocast to reflect this, I'm going to have a rectangle milled the size of the extrusion so it's embedded 5mm into the mounting plate when bolted in.

Also getting the aluminium drilled next week so it will bolt together with 10mm A2's and will add in the centre struts.

[Desertboy]

Getting closer just ordered a 1605 ballscrew 250mm with fittings for z axis as not happy with the ballscrews I have (40cm) and had a score on the tool aluminium which has saved me £70 ;)

Local aluminium supplier had a few pieces that were cut too short for the customer which are perfect for me £30 ;)

2* 360mm*150mm 20mm these will be my gantry mounts
1*300mm*120mm 15mm this will be the basis of my Z

Still need to work out what other little bits I need but a score and a 1/2 ;)

[Desertboy]

Dilemma 25mm supported rail with 4 bearings for the bottom axis or 15mm Original HIWIN with 4 carriages?

I now have the rail and then some lol ;)

Some nutter just bought a lot of rail and 40 carriages lol.

[A_Camera]

This will set me back another week but after extensive talk to someone in the know I've decided to pour epoxy resin inside my aluminium extrusion (Gantry only for now).

Probably this stuff
http://www.mbfg.co.uk/epoxy-resins/p...ble-resin.html

Mixed at this sort of ratio
50% aluminium filler powder
35% Epoxy
15% Carbon fibre powder

Nasty stuff... Read the safety instructions before starting.

[Ger21]

This will set me back another week but after extensive talk to someone in the know I've decided to pour epoxy resin inside my aluminium extrusion (Gantry only for now).

Probably this stuff
http://www.mbfg.co.uk/epoxy-resins/p...ble-resin.html

Mixed at this sort of ratio
50% aluminium filler powder
35% Epoxy
15% Carbon fibre powder

Fill these cavities


I've found out that epoxy resin generates heat in curing which would cause problems but I will bolt the gantry mount on one end fill the extrusion up leaving another space to bolt the top plate on tight. Then I will put the whole thing in a water bath for overnight to cure evenly.

From discussions with the fibreglass guy it'll be stronger than aluminium but weaker than steel for ~4kg's of weight added to the gantry should make it much more rigid.

Will make the gantry mounts with 25mm ecocast to reflect this, I'm going to have a rectangle milled the size of the extrusion so it's embedded 5mm into the mounting plate when bolted in.

Also getting the aluminium drilled next week so it will bolt together with 10mm A2's and will add in the centre struts.

Not sure if you've done this yet, but it won't make you're extrusion more rigid, or stronger, unless you try to crush it.

[Desertboy]

Not sure if you've done this yet, but it won't make you're extrusion more rigid, or stronger, unless you try to crush it.

Hi Ger21, I'm the same person who posted on cnczone I remember your comments, since then I changed the design to use 3 pieces of extrusion 2 4545 and 1 4590 profile bolted in a straight vertical line they are all the heavy duty profiles and I am embedding the extrusion 5mm into the gantry mounts both sides (Plates are 20mm thick).

I won't epoxy the gantry but I might fill the 4590 extrusion cavity (This is a large one 4l's in volume) with sand on advice from some crazy Germans ;) Who claim it can have a big effect on reducing vibrations.