My baby 15" x 15" machine

[GEOFFREY]

Wilfy, its a good job you are such an expert with sketchup (wish I could hack it), but it looks like you are getting close to this build now Good luck, G.

[D.C.]

i bust my 2 length limit by about 2 meters which i didnt want to do, but it's not the end of the world it's only another £30. however i have a feeling it's all going to change

In the corners of the machine you have a long vertical piece that the ballscrew mounts to and you also have a short vertical piece that doesn't seem to be doing anything, could you get rid of the short pieces to save your self some length?

If you have a load of flatbar left over you could also use that for the cross members of the bed instead of box section, that should get you back to your 2 length goal.

[wilfy]

i got all my help from this thread
http://www.mycncuk.com/forums/cad-ca...iscussion.html

[wilfy]

i cant see how 3mm flat bar can replace a 50x25mm piece of box section, the bed bending is the one thing i'd imagine u dont want. also the upright i could get rid of, but the little white spacers are all that the rails will be mounted to. i'd rather over spend and have solid for the sake of £30.. if it was another £100 i'd be more worried

[JAZZCNC]

Hi Wilfy,

Had a play see what you think to this.? It's well within the 2 lengths but it does use 50x6mm (or5mm) flat instead of 25mm but you'll see why.

Although slightly taller this way strengthens and helps with squareness of quite few area's and allows the screws to be brought down and to the side which will help with crap hitting them.
Because your using twin screws you can get away with slightly less bearing spacing so gained you about 90-100mm extra in the X axis (twinscrews) by shortening the bearing spacing slightly and off setting the rails back.

Let me know what you think and I'll tidy up the model and send back.!

Edit: Blue is 50x25mm Red 50x6mm
Edit2: Oh and if you don't like it then don't be afraid to say so you won't offend me.!

[D.C.]

i cant see how 3mm flat bar can replace a 50x25mm piece of box section, the bed bending is the one thing i'd imagine u dont want.

Fair enough, if you do end up with a load of flat bar left over it is quite easy to weld two pieces together into a single piece of angle.

[wilfy]

Fair enough, if you do end up with a load of flat bar left over it is quite easy to weld two pieces together into a single piece of angle.

never thought about that, but if you look back at the previous page, dean has kindly gone over my design and reduced it down and says that it should leave me with 3 meters now out of a full length and all i have to use is 50mm x 5mm instead. which outs the cost at £90 on the dot so i'm more than happy.. and it looks a damn sight better than mine lol

[wilfy]

looks awesome and very professional and its funny cuz i had the screws there on the x axis the first time. i feel happier about the rails not bending on the x and y axis with the supports and i didnt realise i wouldnt need to support the back of the y carriage. and if you gained me back some x axis length then thats even better.

brilliant thanks a lot dude.. if you gonna send me the drawing can u send it as a dwg, dxf, skp, 3ds, dem or ddf... strangely enough sketchup lets you export as an OBJ but wont let u import as one :S

[JoeHarris]

Looks like you are getting the hang of skp. What travel are you getting on you x and y?

[JoeHarris]

enough sketchup lets you export as an OBJ but wont let u import as one :S

that's google trying to annoy you into forking out for the full version!