looking to make a shopping list

[cropwell]

Whilst I agree with you Jazz,

I have bought most of the build kit, with only a roughed out design. I had good reason to do it that way, I had to spend the money before my wife decided something else was more important. I know that warranties will be wasted and some bits may not turn out to be appropriate, but I didn't see my build EVER happening otherwise.

At least now it won't be new carpets, furniture, decoration, etc instead. I have enough in the garage to start a construction and except for a pulley or belt or something, probably finish it too.

As my granddad used to say before they took him away - 'There's method in my madness'.

Cheers,

Rob

[JAZZCNC]

Whilst I agree with you Jazz,

I have bought most of the build kit, with only a roughed out design. I had good reason to do it that way, I had to spend the money before my wife decided something else was more important.

Easy sorted.??? . . . . Do what I did get rid of the Fat controller and retro fit with newer younger model. When starts putting demands on system do another retro fit. .

[Daveo]

ok, so can any point me to a few links so i can get an idea of what i want.as i said i would like it around 1200mm x 600mm
daveo

[Daveo]

how about these for the sides
http://www.ebay.co.uk/itm/ballscrew-...MAAOSwtnpXkHTK
extrusion
http://www.ebay.co.uk/itm/V-Slot-Alu...gAAOSwv0tVCusb
daveo

[cropwell]

Can you give us some idea what you want to cut ? It makes an awful lot of difference if we know whether you just want to gently slice spongecake or hew titanium at warp speed.

Ta

Rob

[Daveo]

hi
i want to cut carbon fibre and ally, my boy wants to do skate board decks
daveo

[Clive S]

ok, so can any point me to a few links so i can get an idea of what i want.as i said i would like it around 1200mm x 600mm
daveo

Have you done any research on the forum and looked at some of the very capable machines if you are not careful you will waste a lot of money.

It shows you have not done much as you are looking at 25mm ball screws with linear supported rails.
for a decent machine for the size you are looking at you will need 1610 on X and Y and 1605 on Z also the square rails have come down a lot in price are are far better.

First start a build log with a new post to keep all the questions in one place and then design something in cad there is no problem copying other people designs and then you will have a much better idea.
The golden rule is don't buy anything until you have a design sorted then the wise ones on here will put you right.
Good luck with the build .

[Daveo]

hi
yes you are correct, still trying to find out what i want, i have looked but cant find any builds like i want and was hoping for a few suggestion and then start reading
so the 25mm ball screws i was looking at are to big?
thanks daveo

[Neale]

Believe it or not (and you probably won't until you do the sums) an oversized ballscrew will be a bigger limitation on performance than, say, the weight of the gantry. Especially a 5mm pitch as it has to spin faster than, say, a 10mm pitch, for a given speed. When the gantry accelerates from rest, you have to spin up the ballscrew and the rotational inertia of the ballscrew will be a major factor slowing it down. Ditto fitting a too-big motor - a combination of inertia and other electrical factors will reduce performance. This is why it's important to take guidance from the community here - use their experience rather than paying for your own!

[Daveo]

ok thats good info,thanks
so i am looking to build a 1400mm x 600mm
ball screw 1610 on X and Y 10mm pitch and 1605 on Z 10mm pitch ( whats the best motors for theses)
any suggestions on the aluminium extrusion
thanks daveo