Thor, or should that be Zeus?

[Lee Roberts]

I've always used Trent Plastics with good results. They cut to size and will do bends if needed - here is a 1 m square of 5 mm clear poly-carbonate:

https://www.trentplastics.co.uk/poly...e-lexan-sheets

Andrew how about white PVC sheet 8x4, its used as cladding for public toilets and cubicles in places like Tesco, my local uPVC window place can probably get it for me at a better price than eBay but what do you think: uPVC Hygienic Wall Cladding Sheet 8x4 White

[AndrewMawson]

Lee, I know the stuff, I've used it to line the toilet cubicle in my workshop :) Personally I think it's too fragile but then I'm used to industrial stuff and like to make things solid and bullet proof.

Chaz pictures of the PCs attached:

Processor Intel(R) Pentium(R) D CPU 2.80GHz, 2793 Mhz, 2 Core(s), 2 Logical Processor(s)

Most have had the HDD removed but I've found a box of suitable HDD's !!!! Some have DVD / CD players, at least one has a floppy disk play - all are modular so you can make a specific one from bits of the others.

All have a parallel and serial port so good for MACH3

[Chaz]

Ok, problems getting a cooling system for the spindle to work.

The chiller I got from AndrewMawson is way too powerful and it blows the piping off when it starts up. So unless I get some form of bypass valve or control valve, its not going to work.

I tried a few pumps from Amazon, typically used for fish tanks, they are all too weak. Looking at PC water cooling kits but they are pricy. Can anyone suggest a pump that will work with 6mm piping?

Thanks

[Chaz]

So Ive ordered this after reading a few posts. Looks like the other one I tried was not up to the required spec.

https://www.amazon.co.uk/gp/product/...0?ie=UTF8&th=1

[Lee Roberts]

So Ive ordered this after reading a few posts. Looks like the other one I tried was not up to the required spec.

https://www.amazon.co.uk/gp/product/...0?ie=UTF8&th=1

A few have used these and they prove more than up to the job: http://www.ebay.co.uk/itm/371128026468, you dont need to go mad trying to cool these spindles down, they are quite efficient and shouldn't really get hot.

[Desertboy]

Ok, problems getting a cooling system for the spindle to work.

The chiller I got from AndrewMawson is way too powerful and it blows the piping off when it starts up. So unless I get some form of bypass valve or control valve, its not going to work.

I tried a few pumps from Amazon, typically used for fish tanks, they are all too weak. Looking at PC water cooling kits but they are pricy. Can anyone suggest a pump that will work with 6mm piping?

Thanks

should be fine I'm using standard fish tank pump with a 13mm reducer the main thing is the head height and you have 2.5m which should be more than enough.

The chiller does it have it's own pump?

[Chaz]

should be fine I'm using standard fish tank pump with a 13mm reducer the main thing is the head height and you have 2.5m which should be more than enough.

The chiller does it have it's own pump?

Ye, and its much too powerful. I made an adaptor to go from 12mm to 5mm and it blew it off immediately. The chiller is more powerful than most coolant pumps ive seen at full whack :-) Theres an idea ...

[AndrewMawson]

Simple bypass from output to input - just a tap that can be opened gradually and you can set the pressure exactly as you want it. This was standard practice on the main Grundfos 3 kW pumps that circulated water in my Launderettes when I had them - simple gate valve and in that case a pressure gauge. High enough to fill a washing machine PDQ, but not high enough to bust the flexible hoses !

[Desertboy]

I would add a 2nd pump to circulate through the spindle then hook the chiller to a thermostat like this


A pond style water pump will work fine I have a box of 20 of them I can send you one for free if you want and will use less electricity than the pump in the chiller.

With a reasonable size res of 20l's the chiller will only need to run a few minutes in an hour and I bet that water pump in the chiller uses quite a bit of juice.