Or it helps.
Sigh.As the title says really.So at that realization.... i have started to delve into the deep rabbit hole that is CNC.

Brief back ground...

Name is liam based in kent/london

day job is cad technician doing highways/parking arrangements (All 2D)in my spare time i play with the 3D stuff.

Did mech eng at college (and some basic G-code stuff) and motorsport eng at uni.Always had an interest in mechanical things Dad is retired car mechanic and was a cycle mechanic for 4 years as well.

Recently bought a house so DIY is my most practiced hobby at the moment...but i now have space available to store a CNC machine..

Hobbies include fishing,golf,bicycles,football and rc car.


As for the Rc cars...i Enjoy building them rather than racing and this has lead me to do a fair bit of 3d printing.3D printed a lower Centre gravity gear box for a toy car and a few side supports.



Build thread of 2 i have build...
http://www.oople.com/forums/showthread.php?t=183146
http://www.oople.com/forums/showthread.php?t=96626

i would no like to machine some chassis for them and make some other bits for my car so i thought i would use the opportunity to build a CNC machine.

Milling/cnc has always fascinated me and have started to notice allot of the DIY kits pop up on fleabay. Looking around at them they are great as they are relativity cheap to get started how ever i feel they are not always as well made as they could, more backlash (quote me if am wrong) and feel like if i build one from scrath i can 'over engineer it' if i wanted too.

Again would love help and input from people as i a newbie.

i initally drew up once from instructables.

https://www.instructables.com/id/Bui...lling-machine/




This was what i came up with:



I am fimiliar with the extruded alu profile i made a frame building jig out of it used a company called minite(but thats another story)


Recently started reading more and more about it (again) and stumbled across mikeyc38 design and this reignited my designing.
what i really like about his desing was the Y and Z axis.

So i decided to 'Borrow' the concept as it looked very neat and counterbalanced the weight of the spindle.Also since looking at his design i have looked and simplifying my design a tad to to make it cheaper/easier to make.




Left was my 'final ish' design utilised 4 45x90 profiles.To the right is a new bridge using sort of mikeys design.

My design will no be as big as mikeyc38s.

My bed dimensions will be 500 x 800 (roughly) So i am not going for a massive machine.

i will be using it to hopefully machine sheet alloy,sheet carbon,alcetal/derlin and wood.

probaly used a Nema 23 type motor and would like to used linear guides instead of rails.

have a few are i would like to address...

1.The design i have based mine up uses a bearing block that takes a '6207' bearing.
i would like to replace these with a standard of the shelf part so means less machining again.
Thsi is what he makes...sure there would be an off the shelf soulution


2.Helps on the X axis understanding what slide/block is needed to link the 'Leadscrew' to the sledge. (as it where)this would help finalise hole placement on the lower part.

3.if using 'Mikeyc38' X Y axis need to under stand how the motor would be mounted and interact with the lead screw.

3.understanding what pulleys and belts are needed.

4.understanding what ball/leadscrews are needed.


probably loads more questions as i get deeper into it.


typical,it will take a while and will try to do a bit each month when the design is final.

burnign question also is it just worth buying a kit machine of internet? (convenience etc etc etc)

Sorry if its rabmly and bit miss jointed.

Look forward to your input

liam