Initial Design Check Please

[JAZZCNC]

JazzCnc are inductive proximity switches accurate enough to use as home and limit switches? Ive used magnetic hall probes in the past but never there.

Yes they are very accurate see the vid I made.

Also would 3mm plate be strong enough for my cutting bed box with a 10mm drilled mounting plate installed in the bottom or shoul I make the box out of 5mm sheet?

Well if it's just box to contain coolant then yes will be fine but if your thinking to mount cutting bed in there and hang like the drawing suggests then NO WAY will it be strong enough.
To be honest when I first seen the drawing I wondered if you had in mind to put the cutting bed in the bottom of that box and dismissed it that you wouldn't be doing that but now I'm not so sure.! . . . . So which is it.?

[Gotty101]

Hi JAZCNC, Thanks for the vid, was a great help.

With regards to the bed, yes the actual cutting bed is mounted in the bottom of the box.
So i think i need to go back to the drawing board, i got the idea from the post by biketrialsdave of the red CNC.
http://www.mycncuk.com/threads/5549-...rials%29/page9
From the looks of it though maybe i should build the box frame in steal box section with a thick base and then mount the bed to that?
Im sure ive seen a blue machine with a similar design.


There is a nice idea by Jonathan on this post here http://www.mycncuk.com/threads/6484-...strong-machine 14th picture down on the left

Thanks again

Trev

[JAZZCNC]

Doesn't need anything too fancy Just make a strong frame which fastens to main frame and sit bed on it then surround bed with sealed sides and it won't be any issue but just hanging the bed inside the box will make it resonate and vibrate like crazy when cutting.

Would also use thicker than 10mm Ali for the bed 15/16mm minimum 20/25 better.

[Gotty101]

Thanks Jazz, ive just redrawn the lower frame and the bed but just need to finish a few bits before i post any more pics up. Ive ordered the prox sensors.

Thanks

Trev

[Gotty101]

Hi Jazz, ive redrawn the bed its now 20mm thick with a box thats 25x50 surrounding it.

[JAZZCNC]

Better but will be difficult to achieve and be good enough. Far simpler to just make box section frame and sit the Bed on top then just use Thin sheet to make a surround for containing coolant.
Also how you going to drain and filter and remove coolant/chips because that box will soon fill up with chips/coolant.?

[Gotty101]

Hi Jazz, thanks for the reply. Ive altered it and hopefully im getting there. I am planning on using thin aluminium angle to build up a shallow surround. Im planning on using mist cooling and not flood.



With regards to electronics what kind of steppers do you think this cnc will eventually require would it need the 3.1nm or 4nm stepper, only reason im asking is to check the stepper space that ive got for the z axis stepper?
http://www.cnc4you.co.uk/CNC-Kits/Di...3.1Nm-x-3-Axis