beginning steps to building my cnc

[scnc]

Thanx For your help Neil,

That would be very useful and helpful,

I think the best way would be to design the cnc with help, and learn from the forum with help from people like you. Thanx again much appreciated.

My budget is about a £1000 and i would like it to be a stable machine dont really want too many problems in the long run as i would be using it for work. Would be nice if I can cut aluminium, mdf, ply, composits and acrylic sheets.

Thats about all of it really,

I will re attempt some design work today based on the information you gave me and see how I can implement it in to the design. I hope by doing this I have a perfectly designed and well understood cnc machine :-)

Thanx again

[Jonathan]

My budget is about a £1000 and i would like it to be a stable machine dont really want too many problems in the long run as i would be using it for work.

With only £1000 it will be tight - you certainly will have to make it yourself to achieve that.

The electrical parts, i.e. 4*3Nm stepper motors, DQ860MA drivers, PSU, breakout-board will be about £300
2.2kW spindle + VFD, which is the only one worth getting for this size machine since you want it to last and cuts lots of different things, about £240
Water pump for spindle, £15
Steel for frame, about £50
You'll need something like this for the ballscrews and rails:
RM1610-1500mm, *2
RM1610-1200mm, *2
RM1605-250mm, *1
Bearing blocks for ballscrews, *4
SBR25-1500mm rails
SBR20-1200mm rails
SBR20-300mm rails
That's about £520 (bit of a guess but should be within 10%).
Pulleys and belts, maybe £35
Total: 300+240+15+50+520+35=£1160

So actually it looks like £1000 isn't realistic for this size machine. There will be other small parts I've not included in that list which all add up, like fasteners, material for bed. Plus I've not included the metal to make the Z-axis and maybe Y, so easily another £100 there - more if you can't cut it yourself. So a realistic budget for this size machine, capable of cutting the materials you suggest, is nearer £1500.

Just to be clear, the above is not intended to be a shopping list - get the design done first before buying anything otherwise you'll have no chance of making it cheaply.

Would be nice if I can cut aluminium, mdf, ply, composits and acrylic sheets.

So basically everything!