Instructables
Picture of Simple CNC Machine
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What I'm going to try and show you in this instructable is how to build a simple CNC machine.

Now when I say Simple I mean you only require basic tools & materials to build the machine.

The machine is made out of Sawn Timber, drawer sliders, nema 17 Stepper motors, a TB6560 Driver Controller Board and a Dremel Trio as the milling/cutting tool

I started about year ago trying to build a CNC machine, I tried a few different designs but i struggled to get the building of them right. This was mainly down to the complexity of some of the designs and the lack of equipment I needed to build them and the money that they cost. So I went back to the drawing board and tried to build a machine that was easy to make and used readily available parts to keep the price down. The machine that i've produce seems a little ruff around the edges but the results of the stuff made have been ok

The Video Gives a quick overview of the Machine
 
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Step 1: What you need

CNC Driver and stepper motor kit
Ball Bearing Full Extension Drawer Slide
A computer to run Linux EMC2 software (the computer will need a parallel port)
A copy of Linux EMC2 (which is fully functional CNC control software)
Wood
Threaded Rods
Nuts
Bearings
A routing tool (I've used a Dremel trio)
Pulleys
Polymorph

A miter Saw
A hot glue gun
Drill
Screws and Screw driver

What you need video

pjethy24 days ago

great job. I am new and interested to make one. I want to know what software to use and how to learn that one.

pjethy24 days ago

great job. I am new and interested to make one. I want to know what software to use and how to learn that one.

pjethy24 days ago

great job. I am new and interested to make one. I want to know what software to use and how to learn that one.

pjethy24 days ago

great job. I am new and interested to make one. I want to know what software to use and how to learn that one.

pjethy24 days ago

great job. I am new and interested to make one. I want to know what software to use and how to learn that one.

pjethy24 days ago

great job. I am new and interested to make one. I want to know what software to use and how to learn that one.

pjethy24 days ago

great job. I am new and interested to make one. I want to know what software to use and how to learn that one.

pjethy24 days ago

great job. I am new and interested to make one. I want to know what software to use and how to learn that one.

Plasanator1 year ago
Great job
johnparker1 year ago
Great instructable! I needed simple instructions as I am a simple person and you have provided those instructions.

Thanks a lot!.
billyduc1 year ago
hello sir,
I'm very interested in your super simple CNC ^^, can you post a guide on how to use Linux EMC2 with this driver?
thank you so much
karkarkar11 year ago
Hi. This CNC Machine looks really well. I'm going to build it.
What's diameter of pulleys?
PTAIYAT1 year ago
This is nice I wanna try it though software part of it is still a problem to me.
gomibakou2 years ago
Instead glueing the rods to the bearings you could use washers and blocking nuts (these ones with plastic in the inner). Make a sandwich: nut-washer-bearing-washer-nut.

Something similar is used in roller skeaters (even you could use some kind of special washers used in them).

In this way the rod won't move and the bearing will be what turns more efficiently helping and smoothing the movement in the rod.

I suppose the coupling nuts you use have some backslash, i mean the free space between the rot threads and the nut threads. You could improbe the efficiency of these making your own "nuts". Use a kitchen plastic cutting table (i don't remember the name of the plastic, it something like DPEM, or PEDM or.. dunno, well all are made of the same material), cut 2 pieces and join them in a sandwich (the size is what you need for your nut). make a hole in the center few milimeters smaller then your rod diameter. Now comes he fun part: apply heat -a hot air gun is nice-, until the plastic melts, then attach the 2 sides around your rod and wait it to cool.

Don't forget you need to join the 2 parts, so make your "nut" wider to have space for some screws (i prefer it rather gluing the plastic).

The process basicly is making a mold in the plastic that cast with it's threaded shape. These kitchen cutting tables are common, cheap and the plastic melts easily under heat and soldifies when cooled.

I also suggest using aluminum. Not all, but maybe in the critical parts as the frame and the "bed". It's "cheap", easy to find and more easy to mechanize at least for our purposes :)
So you would avoid the wood dilatations and contractions (it's a live material), and strenghten the structure...

I think these tiny changes would improbe your performance without increasing the price (the aluminium is the most expensive).

So, you got a "nut" that almost hasn't backlash.
>I also suggest using aluminum. Not all, but maybe in the critical parts as the frame and the "bed". It's "cheap", easy to find and more easy to mechanize at least for our purposes :)

ummm no, aluminium suitable for this project is hard to obtain and very expensive - it would double the cost of this build easily. Buying online is out of the question because of shipping costs
I forgot to tell you could use the same idea about the nut to cast your nuts (not the couppling one). Again, a piece of the our helpful kitchen plastic cutting table, apply heat -much xd- to the nut and leave it on the plastic. You'll have a perfect cast for it. For safety apply some glue.

For smaller nuts i usually apply heat using an iron solder (30w used in electronics). I place the nut on the plastic, then place the iron solder tip in the middle of the nut.... in seconds the heated nut melts the plastic casting it around it. I suppose (because i never did it with such big nuts) you need a higher wattage iron solder (or whatever you can use to heat the nut xD).

Yes i love to see metal things melting plastics xDDD
temper1 year ago
@Redic I would like to know where you can get stepper motors suitable for this project for 99P! (printer tin can type steppers won't cut it) - more like 99 pounds!
Love this design, thanks for posting! I was thinking of building something similar. What kind of tolerance can you get? Think you could etch PCBs with this? What do you think the weakest link in the design is...That is, if you had an extra $50-$100 to spend on this project, what is the first thing you would upgrade?
Thanks!!
What's the cost of that control board?
Depends on the board you use, and where you source it from.
Galahir9502 years ago
What is the working area of this? i.e. The largest rectangle it can cut is 2' 6" X 3' 0".
Well in 1D X" x X" ...I assume you mean the X Axis

Width of the X Axis is 400MM
Length of the X Axis is 400mm, on 450MM sliders... so... about 850 depending on various flactors like levels of play and stuff...

So 400MM X 850MM and Metric...
to Imperial via google 400 millimetres = 15.7480315 inches 859 millimetres = 33.8188976 inches

Doing the math... It's working area 15' 74" X 33' 81

The largest rectangle it can cut, will depend on afew thing's like how thick the wood you use for the Y Axiz, think wood = less play along the Y axis = smaller rectangle.. but needless to say it should be like -3" x -3"
so the Rectangle will be like 12.74 X 30.81 as a rough guess...

This simple design is easier because the X Axis does not move but the table underneath it... Simpler, and stronger, and more working area on X axis

this is what makes this design so much easier from the other CNC instructables on here...
as less moving parts, and less things to go wroung....

and a much larger X Axiz.

Enjoy.
Redsic Redsic2 years ago
Actually.. here is another Sliding X Axis design on here
(cheap and simple)
http://www.instructables.com/id/Building-a-drawer-slide-CNC-machine-for-under-200/

Very simmilar design, and all measurements are listed in Imperail as you like,
although it looks less sturdy as only 1 support for the Y axis, enjoy.
Redsic2 years ago
Hey, great Instructible...
I am looking at building my own, but the stepper board and power supply are quite pricy.. So I will be using an Arduino Controller + and an old ATX PC power supply(cheap and easy!)

But I will be using your structure... Just trying to get the Materials to build it now...

Please correct me if I am wroung, but it needs...

Sumarized Item's required, bill of materials :
1x Cactus Very Sharp ! (Ouch)
1 x water level (need this for accuaracy !)
1 x big base sheet of solid meterial to mount whole project on 500x600mm piece of solid sturdy wood (the sturdyier the better.)
1 x Plywood/MDF 400x430mm for X Axiz table(maybe buy bigger and keep offcuts.)
1 x 300mm by 300mm bit of Plywood/MDF to mount routing tool(cut smaller as needed ofc..)
80 x screws (Enough screws to secure evey piece of wood + some spare incase of error)
10 x small small cut's of wood. to clamp/secure nut's in place (call them wife !)
10 x Length of wood wood atleast 200/250/3000mm to cut as required to join pieces and stabilize/strengthen structure...
4 x Wood Lengths of 300mm long (frame structure...)
4 x Wood lengths of 400mm long (frame structure...)
2 x Wood Lengths of 430mm long (frame structure...)
1 x Wood Lengths of 500mm long (frame structure...)
4 x 430mm Drawer slider (frame structure...)
2 x 500mm Drawer slider (frame structure...)
2 x 300mm Drawer slider (frame structure...)
3 x Threaded rod 500mm (frame structure...)
5 x Nuts (only need 3, but made it 5, incase you loose one or something...)
8 x Bearings (only need 4, but you need spare moving parts !)
4 x glue gun stick (for all you messy glue gunners you may need more !)
8 x 150g Polymorph (or 4 polymorph and router tool mounting kit.. Ouch, link is 150grams for 6 quid from Maplin Cheaper on ebay, 20pounds per kg Ouch...)

Broken down Via Axiz
X Axiz
2 lengths 400mm long
2 Lengths of 430mm
1 piece of Plywood 400x430mm
8 screws
2 430mm drawer slides...
1 Thread 500mm
1 Nut
2 Bearings
1 glue gun stick
2 small lump's of wood. to clamp nut in place
8 Screws
1 Polymorph

Y Axiz
2 x 400mm
1 x 500mm
4 x 300mm
2 x Bearings
2 x 500mm Drawer slider
20 x Screws
1 x Threaded rod
2 x Nuts
2 x Glue
4 x pieces of wood to clamp
2x lengths of wood to join pieces...

Z Axiz
2 x 300 MM Draw sliders
13 x Lump/length of wood
2 x Bearing
1 x Glue
1 x water level
1 x 300mm by 300mm bit of MDF to mount routing tool(cut smaller as needed ofc..)
40 x screws
4 x Polymorph /router mounting equip
1 x big base sheet of solid meterial to mount whole project on 500x600mm piece of solid sturdy wood

I did not understand what gomibakou implied/meant by melting plastic's and precise locations of bearing's.. So I have kept original design for simplicity...
Redsic Redsic2 years ago
Costing it up so-far My rough notes...


Software
http://www.linuxcnc.org/?bcsi-ac-1f5bdcd2691dbbc3=1F39928700000503qrMoMc+2CE5wove6JTjOe/hHM/YFAAAAAwUAADEtmAAIBwAAAQAAAFULAAA=
there are other's, but this will run well on the Raspberry PI, i will use to control this.
Frame
Wood,
http://www.homebase.co.uk/webapp/wcs/stores/servlet/ProductDisplay?langId=110&storeId=10151&partNumber=318088
FSC Untreated Sawn Timber 25x50x2.4m - Pack of 6 - £18.89
What we need it for
10 x small small cut's of wood. to clamp/secure nut's in place (call them wife !) -1 -8
10 x Length of wood wood atleast 200/250/3000mm to cut as required to join pieces and stabilize/strengthen structure... -1 -2 -7
4 x Wood Lengths of 300mm long (frame structure...) - 4
4 x Wood lengths of 400mm long (frame structure...) -2 -2
2 x Wood Lengths of 430mm long (frame structure...) -2
1 x Wood Lengths of 500mm long (frame structure...) -1

What we got for 19quid
2.4m = 2400mm
x6 planks
1plank 2400 - 500 - 430 - 430 - 400 - 400 - 240 = 0
2plank 2400 - 400 - 400 - 300 - 300 -300 -300 - 200 - 200 = 0
3plank 2400 - 300 - 300 - 300 - 300 - 300 - 300 - 300 - 300 = 0
4plank 2400 - 300 - 300 - 300 - 300 - 300 - 300 - 300 - 300 = 0
5plank 2400 -300 = 2100 Spare
6plank 2400 = Spare
= enough and almost 2 planks spare...

Still need bash sheet of wood and 2 plywood sheets

Sliders
http://www.homebase.co.uk/webapp/wcs/stores/servlet/ProductDisplay?langId=110&storeId=10151&partNumber=417112
Ball Bearing Full Extension Drawer Slide - Zinc Plated - 45cm 1 set £13.49

-
Ball Bearing Full Extension Drawer Slide - Zinc Plated - 50cm £13.99
http://www.homebase.co.uk/webapp/wcs/stores/servlet/ProductDisplay?langId=110&storeId=10151&partNumber=422621
Ball Bearing Full Extension Drawer Slide - Zinc Plated - 35cm £12.49
http://www.homebase.co.uk/webapp/wcs/stores/servlet/ProductDisplay?langId=110&storeId=10151&partNumber=405888
Ball Bearing Full Extension Drawer Slide - Zinc Plated - 40cm £12.99
http://www.homebase.co.uk/webapp/wcs/stores/servlet/ProductDisplay?langId=110&storeId=10151&partNumber=411444
Thread
http://www.wickes.co.uk/invt/511122
Threaded Rod M8x500mm PK2 - Nuts & Washers Size: M8 x 500mmPacket size: Pack of 2£3.49£1.75 per EACH

Pulley - nut
http://www.wickes.co.uk/invt/156644
Studding Connectors M8 PK4 - Nuts & Washers Size: M8 Packet size: Pack of 4 £2.56 £0.64 per EACH

Stoppers
http://www.wickes.co.uk/invt/156598/?source=123_75 Steel Dome Nuts M8 PK8 Nuts & Washers Size: M8 Packet size: Pack of 8 £3.00 £0.38 per EACH
http://www.wickes.co.uk/invt/215116/?source=123_75 Rawl Nuts & Washers M8 Zinc Plated Pk20 £1.36


Polymorph
http://www.maplin.co.uk/polymorph-97325 150g - 6 pounds
http://www.ebay.co.uk/itm/1kg-Polymorph-Thermoplastic-Friendly-Plastic-DIY-/170750078621?pt=UK_Body_Shop_Supplies_Paint&hash=item27c17f6e9d
1kg Polymorph Thermoplastic Friendly Plastic DIY £15.60 + £5.40 - Standard Delivery

Bearings
http://www.bearingboys.co.uk/Budget-2561-c?bcsi-ac-1f5bdcd2691dbbc3=1F39928700000503qrMoMc+2CE5wove6JTjOe/hHM/YFAAAAAwUAADEtmAAIBwAAAQAAAFULAAA=
no 8mm ??
http://www.midwestcontrol.com/part.php?id=2525 10 for £1.91 each = £19.10. Ouch.

Gears cams and pulleys
http://www.maplin.co.uk/gears-cams-and-pulleys-97345
£5.99 - out of stock, doesnt matter anyway, i have loads from all the old cheap 99p scanners i bought off ebay, and stripped for their stepper motors, also got cheap glass, control boards with stepper motor control chips, and fluorescent tubes with power supplies. Ace for cheap parts for my hobby projects.
Controller
http://www.ebay.co.uk/itm/CNC-Kit-3-Axis-Stepper-Motor-Driver-Nema17-12V10A-220V-/270900965305?pt=UK_BOI_Industrial_Automation_Control_ET&hash=item3f12f4afb9
Ouch, buy an arduino, and some breadboard with control chips /salvage them cost = 40 pounds max

Power supply, get the cheapest one from a supplier like ebuyer, or free from an old pc, people are always throwing these out... Cost = 8pounds/free.
gives +12 +5v -6.6 +9 +3.3 + 2.2 -2 -5 and a whole lot of other voltages.
If you need any special voltage, attach a voltage regulaor(less than 2 quid on ebay) into the circuit
Enjoy.
Redsic Redsic2 years ago
I really like this CNc design/Instructible, because it is really Simple !

I have broken down the cost, and with the contoller/steppers/psu in this instructible it probarly cost well over 300 pounds, but If you source it differently but dont source the Frame it will cost like 230 pounds.. If you allready have most of the stuff, it will most likely break down the cost till almost free.
but I am guessing most people like me dont have the Slider's and bearing's lying around... so maybe there are some cheaper alternatives. but Not looking at that, The BOM I compiled is like 230 Pounds,
You can find it below....

enjoy.

Cost Breakdown

Controller - 40 pounds max
Power supply - 10 pounds max
Tools - Misc
Draper routing tool - 15
Software - free, the way it is meant to be.
Stepper Motors - 3x99Pfrom ebay + time picking up old dead aplliances+dismantling(never undervalue yout time and not put price on it-life lesson)... 3pounds.
Base Material 11.69
plywood X axis 11.95
Plywood Y axis/router 6.50
Screws £8.69
wood for fram/support 18.89
sliders 40.47
Threaded Rod 6.98
nut/pulley £2.56
Stoppers 4.36
Bearing's £19.10
Glue 5.00
Polymorph 21.00
Gears/pulleys 5.99
Total Max = 231.18
but alot of this can be elimnated be keeping an eye out for what people are throwing out... and pickung up the parts from them...

the biggest hit is the Sliders at 40.47 and bearing's at 19.10 , wish I could find those cheaper.... the Rest of the stuff is not so bad.

Controller
http://www.ebay.co.uk/itm/CNC-Kit-3-Axis-Stepper-Motor-Driver-Nema17-12V10A-220V-/270900965305?pt=UK_BOI_Industrial_Automation_Control_ET&hash=item3f12f4afb9
Ouch, buy an arduino, and some breadboard with control chips /salvage them cost = 40 pounds max

Power supply, get the cheapest one from a supplier like ebuyer, or free from an old pc, people are always throwing these out... Cost = 8pounds/free.
gives +12 +5v -6.6 +9 +3.3 + 2.2 -2 -5 and a whole lot of other voltages.
If you need any special voltage, attach a voltage regulaor(less than 2 quid on ebay) into the circuit

Tools
A Saw (efficent clean cutting, if you have wobbly hand's dont use a hand saw... needs precision cut or dont bother at all)
A hot glue gun (big or small)
Drill (with a few different bit's like one to dig out the holes for the bearings to fit in...
Screw driver, I would have a nice wone with plastic handle, and maybe a little cordless bosh one too(Easy)
Water Level (Precision and strength of frame are essential to a good CNC machiene)

Items I am not accounting for, as I will use other variant's
Powersupply - I will use ATX PC PSU, Easy mod (There is instructable on here to turn one into a bench PSU, look at that for guidelines on how..)
Conrol board- I will use Arduino - I will use arduino (There are instructables on here about how to do this, and how to salvage stepper motors and control chips..)
Routing Tool - Dremel, I will use a Dremel, it is arguably better>speed's/rpm Dremel is like 25/30 punds draper is like 15..
Software - I will use some custom softwater that interfaces with the controller, probarly of a raspberry pi, and small salvaged lcd touchcreen.
Stepper motors, I did some bargain hunting and got about 10 old scanner's/printers etc for 99p a piece off ebay, they guys selling them are happy to get rid of them obselete or faulty/no ink, most old scanners dont work with windows 7...
Pulleys and gears, I will use ones, i got from the scanners and printer's, I have TONS! why buy more? .-)
I also plan to build in an ardino oscilloscope, regulated powersupply, fuction generator, and multimeter all to run off an arduino connected to a raspberry PI,
making this a very usefull, and prictical... low workbench space outlay and cost workshop buddie for beginners.. but that is my own project, not listed in this BOM, and alows space for some lead acid batteries... Should be good.

Sumarized Item's required, bill of materials :
1 x big base sheet of solid meterial to mount whole project on 500x600mm piece of solid sturdy wood (the sturdyier the better.)
MDF for base
http://www.wickes.co.uk/mdf-board-9x606x1220mm/invt/110512/?source=123_74 11.69
But I will salvage some sturdier wood from an old timber door being tossed out. should be better(sturdyer, mdf is abit flimsy/bendy - not good)... and is Free.

1 x Plywood/MDF 400x430mm for X Axiz table(maybe buy bigger and keep offcuts.)
http://www.alwayshobbies.com/Tools-$4-Materials/Wood-Packs-and-Panels/Birch-Plywood-$4-MDF/Birch-Faced-Plywood-Sheets.ice?utm_source=google&utm_medium=organic&utm_campaign=shopping
11.95
Plywood is everywhere ! It is cheap stuff that is always being thrown out, if i keep my eyes open, maybe i will be lucky. I saw some in a skip down the road this morning even... hrmm..
1 x 300mm by 300mm bit of Plywood/MDF to mount routing tool(cut smaller as needed ofc..)
http://www.alwayshobbies.com/Tools-$4-Materials/Wood-Packs-and-Panels/Birch-Plywood-$4-MDF/Birch-Faced-Plywood-Sheets.ice?utm_source=google&utm_medium=organic&utm_campaign=shopping
6.50

80 x screws (Enough screws to secure evey piece of wood + some spare incase of error)
http://www.amazon.co.uk/dp/B000LFYASM/ref=asc_df_B000LFYASM9124210?smid=A3P5ROKL5A1OLE&tag=googlecouk06-21&linkCode=asn&creative=22206&creativeASIN=B000LFYASM
£8.69 Silverline 273213 780 Pack Silverline Countersink Screws They come in a box, have differnt sizes, and come with plenty extra all sizes... for under a 10er... Bargain !

http://www.homebase.co.uk/webapp/wcs/stores/servlet/ProductDisplay?langId=110&storeId=10151&partNumber=318088
FSC Untreated Sawn Timber 25x50x2.4m - Pack of 6 - £18.89 What we need it for

What we get for 19quid
2.4m = 2400mm x6 planks
1plank 2400 - 500 - 430 - 430 - 400 - 400 - 240 = 0
2plank 2400 - 400 - 400 - 300 - 300 -300 -300 - 200 - 200 = 0
3plank 2400 - 300 - 300 - 300 - 300 - 300 - 300 - 300 - 300 = 0
4plank 2400 - 300 - 300 - 300 - 300 - 300 - 300 - 300 - 300 = 0
5plank 2400 -300 = 2100 Spare
6plank 2400 = Spare
= enough and almost 2 planks spare...

10 x small small cut's of wood. to clamp/secure nut's in place (call them wife !)
10 x Length of wood wood atleast 200/250/3000mm to cut as required to join pieces and stabilize/strengthen structure...
4 x Wood Lengths of 300mm long (frame structure...)
4 x Wood lengths of 400mm long (frame structure...)
2 x Wood Lengths of 430mm long (frame structure...)
1 x Wood Lengths of 500mm long (frame structure...)
All wood frame sorted, for less that 20 quid, might want to spend afew more bob, and get treat wood... it lasts longer, or aluminium if you feel like welding...
but that is no longer a "SIMPLE CNC" so sod that, keeping it simple shal we.

Sliders
I am not sure from this outlay if there needs to be different size sliders, ... but yeh he could of just used the same size and not cared if it overlaps, or not.. Simple.. yeah ?
He gave a link for 45cm, so lets account to use only 45cm ones...
they come in a pair for 14 quid, and we need 3 pairs for the three axiz, i am not sure if the X axiz used two pairs.... but for now lets just assume 3, because these are expensive, and we are keeping it simple. = 13.49 x3 = 40.47 OUCH !! 40 Pounds on sliders... Lets see If i can salave some of these off some old draweres,,, but they will likely be the ball and tray ones... not these nice bearing sliders... might have to fork out 40 quid for these... keeping it simple and precise
Ball Bearing Full Extension Drawer Slide - Zinc Plated - 45cm 1 set £13.49http://www.homebase.co.uk/webapp/wcs/stores/servlet/ProductDisplay?langId=110&storeId=10151&partNumber=417112
Ball Bearing Full Extension Drawer Slide - Zinc Plated - 50cm £13.99 http://www.homebase.co.uk/webapp/wcs/stores/servlet/ProductDisplay?langId=110&storeId=10151&partNumber=422621
Ball Bearing Full Extension Drawer Slide - Zinc Plated - 35cm £12.49 http://www.homebase.co.uk/webapp/wcs/stores/servlet/ProductDisplay?langId=110&storeId=10151&partNumber=405888
Ball Bearing Full Extension Drawer Slide - Zinc Plated - 40cm £12.99 http://www.homebase.co.uk/webapp/wcs/stores/servlet/ProductDisplay?langId=110&storeId=10151&partNumber=411444
4 x 430mm Drawer slider (frame structure...X)
2 x 500mm Drawer slider (frame structure...Y)
2 x 300mm Drawer slider (frame structure...Z)

Threaded rod,, Thread

I actually have some of these in the garage that I got from a B&Q clearance sale about a year ago, I bought them for likr 50p knowing one day i would build a CNC :D
but adding up cost's here to be accurate...http://www.wickes.co.uk/invt/511122 Threaded Rod M8x500mm PK2 - Nuts & Washers Size: M8 x 500mmPacket size: Pack of 2£3.49£1.75 per EACH
Comes in acks of two, we need 3, so we have to buy 4.2x3.49 = 6.98
3 x Threaded rod 500mm (frame structure...)

Pulley - nut
http://www.wickes.co.uk/invt/156644 Studding Connectors M8 PK4 - Nuts & Washers Size: M8 Packet size: Pack of 4 £2.56 £0.64 per EACH
well we only need 3 really,, comes in pack of 4.. so 2.56 for 4 These are nice big Nut's I only got little nut's in the BQ sale D
4 x Nuts (only need 3, but made it 4, incase you loose one or something...)

I get what gomibakou is saying about not useing glue to stop the rail from sliding, use stoppers... Increased simplicity +efficency, they are cheap.. so lets get some.
Stoppers
http://www.wickes.co.uk/invt/156598/?source=123_75 Steel Dome Nuts M8 PK8 Nuts & Washers Size: M8 Packet size: Pack of 8 £3.00 £0.38 per EACH
http://www.wickes.co.uk/invt/215116/?source=123_75 Rawl Nuts & Washers M8 Zinc Plated Pk20 £1.36
4.36 Pounds Optional cost, could just use glue... Yucky.

Bearings
http://www.bearingboys.co.uk/Budget-2561-c?bcsi-ac-1f5bdcd2691dbbc3=1F39928700000503qrMoMc+2CE5wove6JTjOe/hHM/YFAAAAAwUAADEtmAAIBwAAAQAAAFULAAA=
no 8mm ??
http://www.midwestcontrol.com/part.php?id=2525 10 for £1.91 each = £19.10. Ouch.
6 x Bearings (only need 4, but you need spare moving parts !)

4 x glue gun stick (for all you messy glue gunners you may need more !)
http://www.amazon.co.uk/Stanley-Dual-Temp-Glue-Stick/dp/B000RHZZC4/ref=sr_1_2?s=diy&ie=UTF8&qid=1344429101&sr=1-2
5 pounds... Be sure the Size of blue stick you buy is the right size for your gun !!! they come in different sizes ! and even if sold together they might not be compatible...
Polymorph

http://www.ebay.co.uk/itm/1kg-Polymorph-Thermoplastic-Friendly-Plastic-DIY-/170750078621?pt=UK_Body_Shop_Supplies_Paint&hash=item27c17f6e9d
1kg Polymorph Thermoplastic Friendly Plastic DIY £15.60 + £5.40 - Standard Delivery
8 x 150g Polymorph (or 4 polymorph and router tool mounting kit.. Ouch, link is 150grams for 6 quid from Maplin Cheaper on ebay, 20pounds per kg Ouch...)

Gears cams and pulleys
http://www.maplin.co.uk/gears-cams-and-pulleys-97345
£5.99 - out of stock
Redsic Redsic2 years ago
Okay, I have two fundamental (probably simple Questions)

2 Questions..

From your link I found cheaper bearings..
I assume they have to have an inside diameter of 8MM to fit the 8MM metal rods ?
(http://www.bearingboys.co.uk/MR148_Open_Miniature_Ball_Bearing_-7817-p
http://www.bearingboys.co.uk/MR148-ZZ_Shielded_Miniature_Ball_Bearing__Pack_of_10_-7820-p)


Also what Length of sliders do you use ?
the same length 450MM for all 6 Sliders along the three axis ?
Or different ones for each axis ?

The version of this CNC machine I am building will build have an elevated hollow base underneath it,
I will put the Arduino, and Raspberry PI and all the other projects.... So I can make this one box, It will, take up a small bit of a table, have all the Lead's coming out of it, and be a small work lab. so I can move the lab in the garage to the study desk...
I intend to build in my own power supply out of a modified PC ATX Supply, and an Arduino and some chips attached with some sensors and circuits to build into it some other projects...
Oscilloscope
http://www.instructables.com/id/Girino-Fast-Arduino-Oscilloscope/

Waveform Generator
http://www.instructables.com/id/Arduino-Waveform-Generator/

Simple Logic Analyzer
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1223530321

Multi-meter
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1266030815/7

Voltage Regulator
http://www.arduino.cc/playground/Main/RegulatedPositiveVoltageBooster
I don't particularly like this one.. I might just build my own circuit separate from Arduino and all else with some cheap components off ebay, like some caps, and inductor coils and variable voltage regulators, with a little cheap 2£ blue LCD voltage display, and some potentiometer dials...
Then I will have a workspace that I can keep in the house, that the women wont toss into the bin, or the garage.. :-)
keep it small, keep it tidy.
rimar20002 years ago
This is impressive!
rimar2000 I loved your instructibles, your welding ideas and fish trap are great !
Thank You.
Thanks for this !, It seems a extremely simple build. Although can i ask how is the z axis holding up ? Do the support beams not move or vibrate when its milling ? ...
koff1979 (author)  stephenniall2 years ago
The CNC machine is holding up ok. The Z axis is working well much better than I thought it would.

It doesn't vibrate much, however i've had to keep the speed down to 3inch/per mins and I haven't cut anything to tough or thick.

I think if I was to build it again I would use thicker wood for Y axis and give it more support. As the more support you can give it the better it will be.
Thanks for the reply ! I'm going to try build one sort of like this, Is there any chance of a video of it in operation ? Milling something ?
In his initial Overview Video just before step 1, He has it milling out a a word, although I didnt regognise what it read.
ea4222 years ago
Nice!
Mine has a similar design and works well. I know all-to-well the struggles you went through to accomplish your CNC.



img_7087.jpg
aleftinas2 years ago
hm, interesting
dionicia122 years ago
This was just what I was looking for. Thanks for posting.
nukky2 years ago
Thanks for this write-up! I'm in the midst of gathering parts for a similar level of drawer-slide machine (ie - doing it on the cheap), so it's reassuring and helpful to see your build.