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View Full Version : BUILD LOG: First CNC build 2x1.5 meter



Dakn
17-04-2019, 11:06 AM
So we are building a CNC Router.

And i am in the designing phase

25672.

The machine should primarily cut wood, but should be able to handle aluminium at a decent speed.

Electronics (had this from an earlier project)
Nema 23, 420 oz steppers 2 for the x axis and 1 for y and 1 for z with
Gecko 540 drive.
UC100

Spindle
2.2kw watercooled chineese thing from cnc4you.co.uk //thank you Clive S

Frame
Supported x side would consist of 120x80 mm aluprofiles
Legs will be 80x80 alu profiles

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The gantry is where i have a few isssues i dont wanna make it to complexm i am considering adding another 80x80 profile so that it will be 80x240


Linier motion
sbr25 supported round rails for y and x
For z (400-500mm) I am considering square rails or the round unsupported since I have been told on another forum that the sbr may not be the best for Z

I have chosen the round rails due to the cost and from what I can figure out it has an accuracy of 0.01 mm over 1-2 meters.

rm2010 ballscrews for x and y
rm1605 ballscrews for z

A lot of people have advised rack and pinion but to me, it seems a more complex solution with a lot of issues,
I dont have a reason really other than I am in love with ballscrews (i know about whipping)

I have also been advised to move the ballscrew up so it is a little higher up than the sacrificial plate.

Clive S
17-04-2019, 03:33 PM
Welcome to the forum Dkan. why "Spindle 2.2kw aircooled chineese thing from cnc4you.co.uk" water cooled are so much quieter

Dakn
17-04-2019, 03:52 PM
Welcome to the forum Dkan. why "Spindle 2.2kw aircooled chineese thing from cnc4you.co.uk" water cooled are so much quieter

Because apparently I dont know the difference between air and water :P

It is ofcourse a watercooled spindle with vfd.
https://www.cnc4you.co.uk/Spindle/Water-Cooled/Spindle-Motor-Single-phase-to-3-Phase-2.2KW-Water-cooled-ER20-with-Matching-VFD-plus-Mount

Clive S
17-04-2019, 04:54 PM
Because apparently I dont know the difference between air and water :P

It is ofcourse a watercooled spindle with vfd.
https://www.cnc4you.co.uk/Spindle/Water-Cooled/Spindle-Motor-Single-phase-to-3-Phase-2.2KW-Water-cooled-ER20-with-Matching-VFD-plus-Mount

Have you shopped around https://www.ebay.co.uk/itm/HY-WATER-COOLED-SPINDLE-MOTOR-ER20-2-2KW-SPINDLE-2-2KW-DRIVE-INVERTER-VFD-NEW/282145254631?hash=item41b12aece7:g:BnIAAOSwCPRawOq 5&frcectupt=true

Dakn
17-04-2019, 05:47 PM
Have you shopped around https://www.ebay.co.uk/itm/HY-WATER-COOLED-SPINDLE-MOTOR-ER20-2-2KW-SPINDLE-2-2KW-DRIVE-INVERTER-VFD-NEW/282145254631?hash=item41b12aece7:g:BnIAAOSwCPRawOq 5&frcectupt=true

Well not really, iv been told that the quality of the spindle varies a lot, while they also offer a china model I was kinda hoping that getting it through a European country would give me some warranty or at least a quality check before I got it

AndyUK
17-04-2019, 09:40 PM
Well not really, iv been told that the quality of the spindle varies a lot, while they also offer a china model I was kinda hoping that getting it through a European country would give me some warranty or at least a quality check before I got it

The cynic in me thinks that the European ones are imported Chinese ones with a mark-up. I guess the mark-up might help pay for a warranty.... :/

I got my 2.2kW water-cooled spindle + VFD direct from China through Fred @ BST Linear (an often-recommended supplier on these forums). Seems alright.... advertised as having (get this) *FOUR* bearings, and pump, and hoses, and an ER20 collet set, etc etc. Was about as cheep as you'll find elsewhere, and if I'm going to put faith in anyone from thousands of miles away, Fred appears to have earned it on the all the other items I've bought and the transactions I've heard about.

Dakn
17-04-2019, 11:31 PM
The cynic in me thinks that the European ones are imported Chinese ones with a mark-up. I guess the mark-up might help pay for a warranty.... :/

I got my 2.2kW water-cooled spindle + VFD direct from China through Fred @ BST Linear (an often-recommended supplier on these forums). Seems alright.... advertised as having (get this) *FOUR* bearings, and pump, and hoses, and an ER20 collet set, etc etc. Was about as cheep as you'll find elsewhere, and if I'm going to put faith in anyone from thousands of miles away, Fred appears to have earned it on the all the other items I've bought and the transactions I've heard about.

I expect the spindle from an European country to be more or less the same as I buy in China, but it is a lot easier to talk warranty and support with a company in the UK or Germany.

I will take a look at Fred from bst.



For the CNC build, I am switching the round rails with squares( i got a good offer)

ill place it on the side of the build, and I will probable add the ballscrews at the same place as the sbr25 on the y-axis.

I will make the ballscrew fixed in both ends which should give me a theoretical speed of 1000pm before it starts to whip.
2,7*10^8 * (1x15) / 2000^2 = 1012.5

ill post a new design tomorrow.

Dakn
12-05-2019, 05:36 PM
First build day things are moving forward :)

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