DIY CNC milling machine parts checklist

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04 Apr 2021 18:02 #204795 by benqick
hello there
After 4years working on CNC milling machine I decided to make one of my own for some extra cash
past few months I've spent in researching and finding out what I really want
it came down to 1500x1500x500mm (1200x1200x250mm working area)
I'll be working hardwood, plastics, and maybe some aluminium from time to time

about design
for X axis, I'll be using linear guide rail 20mm with 2010 ballsrews on each side
for Y axis, 2x linear guide rail 20mm with 2010 ballsrew
and for Z axis, linear guide rail 20mm with 1605 ballsrew
Frame will be welded steel and gantry 90x180mm extruded aluminium profile
Z axis will be mounted on 150x500x20mm aluminium plate

I think that covers up what I want, here's the list I came up with

4x 4Nm closed loop steppers KIT with drivers and power suplly from stepperonline
Motors link

3kW air cooled spindle from rattm-motor with VFD (it's cheaper then 2,2kw)
SPINDLE
VFD

inductive switches and emergeny switch (still have to find which one)

I was plannig to use MESA 7i96 STEP DIR I/O daughtercard
correct if I got something wrong
for that card I need separate 5V power supply ?
card power

I've seen lots of projects where ppl use buch of other stuff in their system (noise filters, fuses etc)
Do I really need those, or can I just connect everything according to schematics ?

I'm sure I missed something, so before I go on shopping spree, I'd be grateful if you can point me and correct before I buy something wrong or something that I dont need
thanks in advance

here's a rough idea of what I'd like to make
Cheers, Goran
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06 Apr 2021 00:25 #205006 by andypugh
I think that you probably should expect to need a line filter for the VFD, but they do not add much to the cost.

DIN rail breakers are neater than fuses, and are a one-time cost. They can be had in very small sizes: uk.rs-online.com/web/c/fuses-sockets-cir...&sort-order=asc&pn=1

Pricing seems random.

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06 Apr 2021 18:32 #205168 by benqick
thanks for advice
gotta look up for that too then
anything else I'm missing ?

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06 Apr 2021 18:50 #205171 by andypugh

anything else I'm missing ?


Equipment wire, ferrules for the wires. Connectors (I like Neutrik SpeakON for steppers, rated 20A)

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11 Apr 2021 15:50 #205648 by benqick
yea of course :)
what about mesa cards, is MESA 7i96 STEP DIR I/O daughtercard alone enough ?

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11 Apr 2021 17:30 #205659 by tommylight
Get the 7i76E if possible.

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12 Apr 2021 04:06 #205695 by benqick
What do I get with 7i76E for extra 100€?

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12 Apr 2021 06:31 #205702 by Clive S

What do I get with 7i76E for extra 100€?


Spindle control, mpg software encoders, more inputs and outputs plus other stuff.

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21 May 2021 03:51 #209726 by datarat
don't forget to use shielded cable for all your connections! beldon wire is the best to keep gremlins at bay

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