DIY CNC Milling Machine From Scratch
Hello everyone, well after making my first router type cnc machine on a budget ive decided to push the boat out and make a milling machine based of a sieg x3 machine.
The machine is going to be a bit larger than an x3 and hopefully far more rigid.
linear rails on all axis
DQ860MA 80V Drivers
yet to decide on powersupply
3.0Nm on X and Y nema 23
4.5Nm on z nema 34
2.2kw spindle to start with and hopefully BT30 spindle with ATC in the future.
Pictures to follow:
Re: DIY CNC Milling Machine From Scratch
Hopefully this is what it will look like: Nearly fully Drawnhttp://img.tapatalk.com/d/14/06/26/zu7yde6y.jpg
Ears welded up to support the z axis
http://img.tapatalk.com/d/14/06/26/epy4u4a9.jpg
Z axis sides, 20mm thick:
http://img.tapatalk.com/d/14/06/26/husu9y2u.jpg
The z axis fully built ready to be surface ground:
http://img.tapatalk.com/d/14/06/26/nyzamede.jpg
Surface ground and holes drilled and tapped for the ears:
http://img.tapatalk.com/d/14/06/26/beneme2u.jpg
Just checking the squareness: looks pretty good although this is adjustable on final assembly:
http://img.tapatalk.com/d/14/06/26/6eza8are.jpg
Mock up:
http://img.tapatalk.com/d/14/06/26/8e6u8e7y.jpg
Steps machined for linear rails and ball screw supports and nut:
http://img.tapatalk.com/d/14/06/26/ryma9ezy.jpg
All holes drilled for linear rails, ball screw supports and the screws which will push them towards the parallel edges:
http://img.tapatalk.com/d/14/06/26/une7ehad.jpg
Y axis plate machined and holes drilled ready to mount the rails and then surface ground:
http://img.tapatalk.com/d/14/06/26/umu2e8y5.jpg
Re: DIY CNC Milling Machine From Scratch
This is just a test piece to check how well the taper locks up: was pretty good with just letting it drop in under its own weight, it would stay in when held upside down, and with a tap of a mallet i wasn't able to pull it apart by hand :)
http://img.tapatalk.com/d/14/06/26/hu9ubehu.jpg
http://img.tapatalk.com/d/14/06/26/aradupa3.jpg
Adjustable gas strut to help with the weight of the heavy z axis:
http://img.tapatalk.com/d/14/06/26/y4a8ege3.jpg
That's all for now apart from the rails and ball screws that everyone has seen before, material for the bed has been ordered and hopefully will be starting this soon :)
Hopefully everyone likes the build so far!
Re: DIY CNC Milling Machine From Scratch
Very nice and definitely will be following this build.
Re: DIY CNC Milling Machine From Scratch
There I was at lunch time today browsing through google images at other peoples mill type builds (shortly after reading through JBs x3 conversion thread), i'm keen to have a go at my own mill type, is it obvious yet?
Then I jump on tonight and I find this gem of a thread! Yea! Perfect timing, cant wait for the rest totts !?!
.Me
Re: DIY CNC Milling Machine From Scratch
Starting to look very purposeful. Well done. G.
Re: DIY CNC Milling Machine From Scratch
Thankyou, lots still to do, everytime i think about it theres more to do! :(
Re: DIY CNC Milling Machine From Scratch
Quote:
Originally Posted by
totts
Thankyou, lots still to do, everytime i think about it theres more to do! :(
Hehe always the way, are you going to fill the z axis column with anything to help with resonance or do you plan for something else, what are you going to use for the base of the machine, my thoughts are a nice slab of steel?
.Me
DIY CNC Milling Machine From Scratch
I have a nice solid slab of aluminium as shown in the drawing, about 500mm x700mm by 76mm thick so i hope this will be solid enough.
I was going to fit some of the electronics into the colomn but i am now going to make a stand to house the spindle cooler, electronics, pc and coolant pump, so will probably think about filling the column with something after the z stepper and y stepper is mounted so i know where to fill.
Trouble is the cost keeps mounting up :( best not to take note and hide the reciepts from the missus hahah
Re: DIY CNC Milling Machine From Scratch
Good start - almost getting jealous!
A few general observations...
Have you seen the BT30 ATC spindles on Aliexpress? If you're happy with 6000rpm then they're not excessively expensive:
http://www.aliexpress.com/wholesale?...initiative_id=
PSU - why no decision? A toroidal transformer of around 500VA would be ideal.
What is the mass of the Z-axis (head, spindle etc) and what are the dimensions of the Z-axis ballscrew? I've made a script to calculate it more accurately, so if you post that information we can make sure the motor you've chosen is the best option. I suspect you may be OK with one of the 3-4Nm Nema 24 motors. The gas strut makes surprisingly little difference if you try to get a reasonable acceleration...
Correct me if I'm wrong, but it looks like you're leaving the back of the Z column open, so it's a C-shape section not a box? If so then you should defiantly put another plate on the back, as the torsional stiffness of a C-section is very low compared to a box. That's one of the big advantages of putting the ballscrew on the front of the column, not inside - you can have a closed section.