My Home made CNC Router finished and 60 hours later

[Matty Zee]

Sorry, think i mislead you. I mean the nut (i think there are three to the left in your photo. Just wonder what the length and the OD is, and what the threaded bit is.

That pic looks great. Did you design it yourself?

[simso]

Yes my own picture from a scanned piece of paper. The nuts are supplied by homecnc, they are the standard non preloaded units. I dont know what the external size is Ill have a look later but need to access some remote areas to do it, Im pretty sure however they are about 28mm dia with a length of about 45mm. Basicaslly just buy his units and build from there

[CNCRob]

Great job on the router build. Looks like some pretty impressive projects you have been doing with it.

[simso]

Thanks Rob, Matty the ballscrew nuts are 43.5mm long total, 27mm dia on but the one side with the ball recerculating tube is an additional 7mm in dia, the threaded section of the unit is 13.5mm deep. When attaching these to you axis's all I used was a block of alloy drilled and tapped and simply screwed thes ballnut into the block, the block is attached to the axis with two bolts as well. I have seen people simply use a piece of 5mm angle line instead of a solid block and it works fine too. Hope the picture explains all
Steve

[crocky]

Hi Steve,

Can you please upload a picture like this one but taken of the front of the gantry. I am a one handed (LH only) who is soon to be building a CNC and a view, or views would be pretty good as I am just at the stage of working out where everything goes to do with the gantry and the up and down things.

I do know Rod from over there too

I have so far got Router, Xylotec 269 ready to go kit, linear bearing blocks and slides. I have got ballscrews and pre-loaded nuts coming from homeshopcnc and all the ITEM coming from Melbourne to build a frame.

Your machine looks great by the way!

Regards,
Bob

[simso]

Hey bob, yes rod gets around doesnt he, he doesnt have an obsession with these at all, I think hes planning unit no 5 now. Okay heres some more photos hope they help. PS I didnt use preloaded ballnuts, just the standard ones and I can guarantee there accuracy its phenomenal. Theres also a pic of a 23 piece unit cnc cut out and sanded and assembled on page 3 of a roo drinking beer, to show you how accurate they can be.
Steve

[crocky]

Hi Steve,

Thanks for the photo's, just what I needed

Looking at the centre photo, is that a piece of 25mm square or something similar. It goes the full height and I would guess there is another on the other side too. It looks like that is how you get enough room for the leadscrew to fit, just the info I needed... Thanks!

[simso]

Your talking about the z axis. That is a piece of 25mm thick by 100mm wide piece of aluminium. I milled the whole centre out to a depth of 15mm so that way the ballscrew and nut could fit smoothly in and the rails sit on the two sections left proud after milling out the guts. I looked at just simply bolting some 25mm by 25mm onto a base piece, but the feasability accuracy ridgity ect became issues and this was just easier and came up a lot better as its one solid piece.
The trick I found was to complete an axis and make it independant by itself. Example finish the y axis as a completed unit. Then make a z axis complete by itself and then bolt the two together, that way neither part relies on partys from the other to work properly, they are completley independant. Example my y axis is complete with a 160mm by 300mm plate that moves from left to right. My z axis simply bolts onto this plate
My x axis is a complete stand alone unit where you simply bolt the gantry onto, the gantry does not complete the x axis but simply attaches to it

[crocky]

Thanks Steve,

Just had a call from Linear Bearings, they are cutting my ITEM as we speak

I can't get that much machined but I think I can get hold of some 25mm square section and that should do very nicely until I can organise something better

Regards,
Bob

[pinemartin]

Hi Simso, Nice machine..
Have the same problems getting bits.
Me i am just starting out to try and build my own cnc. looked at BOBart seems to do the job, but who knows.
Dont suppose i could ask you for some guidance. if you have time

Dave

Scotland

[simso]

Course its okay, thats what its all about nowadays sharing information and helping others with the same interests. If it wasnt for a local person who I met through this same process I would probably be still building mine and altering and redesigning ect

[pinemartin]

Thanks
I have designed the table. still to be built though.
What i would like to know is what equipment i would need to start running if you have a schematic layout of what i would need i would point me in the right direction. i dont know what else is needed besides stepper motors even then which one what else goes along with the to make the machine run in all 3 axis. god i sound dumb.. i do have autcad and i am pretty good with it if that helps?