[OlfCNC]

Mach3 does not require much computing power, it runs fine on old computers. I guess it is because it is an old software and was developed for old and slow computers.
The UCCNC is a bit more picky but according to the developers only for the graphics card.
You can test the demo softwares though to see how well they run on your computer.

[wmgeorge]

That’s what I hope If I try Acorn. If it runs from a board with its own processor and memory why it needs more that just a basic Win 10 computer.

[davida1234]

Everything else is finally finished and I am excited to be able
to move on to the final phase of my build before I can start
tramming the machine, setup the software and start cutting.

LINEAR DRIVE:

The machine will be using Teknic Clearpath SDSK servos.

I chose the CPM-SDSK-2321P-RQN, a Nema 23 sized, fairly
low power model with 246 oz-in peak torque, 4000 rpm and
a $300 price tag to see how it will perform on the machine.

Due to chosen gearing, servos on this machine should have
3000-4000 rpm capability. There are other Nema 23 sized
SDSK servos that go up to 528 oz-in peak torque with those
specs but the costs go up pretty high too.

Teknic servo to be used:
Attachment 414960

I use clamping pulleys to not damage
the shaft. Install the 40 tooth pulley
using a piece of paper as spacer:
Attachment 414962

[HuguesP]

i was looking for the exact same thing but the difficulty to found clamping of taper clamping pulley at a reasonable price sets me back. are all your pulleys clamping, where did you get them. On the other side tknik also offer some 1400-1800 model, that would not require any gearing. what make you choose this setup

[davida1234]

SDP/SI sells them at $19. They are nice quality.

Product | Designatronics Store | Stock Drive Products/Sterling Instrument

The rpm are required due to final drive ratio.

[davida1234]

Pulleys installed:
Attachment 414964

Spacers for the servos:
Attachment 414966

With the servo:

[davida1234]

The fans for the servo drivers:
Attachment 414972

Servos with fans:
Attachment 414974

And 9mm belts:

[davida1234]

37mm angular thrust
bearings for the ball nuts:
Attachment 414980

The servo mount with the thrust bearing
and the shoulder bolt installed:
Attachment 414982

And the ball nut retainer cage:

[mactec54]

37mm angular thrust
bearings for the ball nuts:
Attachment 414980

The servo mount with the thrust bearing
and the shoulder bolt installed:
Attachment 414982

And the ball nut retainer cage:

I though that is what you where going to do by where your motors where mounted having a rotating Nut is a good design to use, I use rotating nuts quite often as well

[davida1234]

The double ball nut used on the machine
(with the dust shield taken off):
Attachment 414990

Attachment 414992

Attachment 414994





You are welcome to utilize any parts of the design for your personal use.
Please contact me for commercial applications.

[davida1234]

Parts for the rotating nut together:








You are welcome to utilize any parts of the design for your personal use.
Please contact me for commercial applications.

[davida1234]

Rotating ball nut assembled
on the servo mount
(without the ball nut retainer):
Attachment 415000

And with the retainer:
Attachment 415002

Dust shields mounted:
Attachment 415004






You are welcome to utilize any parts of the design for your personal use.
Please contact me for commercial applications.

[davida1234]

Ready for installation
on the machine:
Attachment 415006

A bolt with a locknut as a gage makes sure
that the retainer is parallel with the mount:
Attachment 415008




You are welcome to utilize any parts of the design for your personal use.
Please contact me for commercial applications.

[Ntl]

What kind of rapids will you get with the ball screws?

[davida1234]

The ball nut is a 1204.

4mm per revolution = 0.15748 inches per revolution

Belt drive factor is 38 tooth to 40 tooth = 0.95 ratio

Lead per revolution: 0.15748 x 0.95 = 0.1496 inches per revolution

At 500 rpm = 74.805 ipm
At 1000 rpm = 149.6 ipm
At 3000 rpm = 448.8 ipm

[davida1234]

having a rotating Nut is a good design to use

Thank you mactec54, the rotating ball nut
runs really smooth on the one screw I tried.

[davida1234]

.

Z-SLIDE BALL SCREW INSTALLATION:

Installation of rotating
ball nut on the Z-axis.

Spacer and shoulder bolt in place:


Servo with belt in place:

[davida1234]

What kind of rapids will you get with the ball screws?

Ntl, to elaborate on your question a bit more,
attached is the torque curve from Teknic's website.

Full torque is available at up to about 1,000 rpm.

50 percent torque is available at about 1,750 rpm.

So, I would say, heavy cutting, as much as the
servo can deliver, would be up to 150 ipm.

Lighter cuts up to about 250-300 ipm.

Rapids at about 350-450 ipm.

Max. theoretical rapids at 4,000 rpm would
be at about 600 ipm if you are brave enough
to run that speed on a 2x3 cutting envelope.

[Ntl]

Ntl, to elaborate on your question a bit more,
attached is the torque curve from Teknic's website.

Full torque is available up to about 1,000 rpm.

50 percent torque is available at about 1,750 rpm.

So, I would say, heavy cutting, as much as the
servo can deliver, would be up to 150 ipm.

Lighter cuts up to about 250-300 ipm.

Rapids at about 350-450 ipm.

Max. theoretical rapids at 4,000 rpm would
be at about 600 ipm if you are brave enough
to run that speed on a 2x3 cutting envelope.

Ok I was curious of the ball screws vs what I have rack and pinion. I wouldn't worry about the 600ipm your machine looks really well built, my router is similar size just a bit bigger in the y axis and I'm running 900ipm rapids with no problems and that's with 25000 steps per revolution. The higher rapids even on a small machine are nice if you have a job with a lot of tool changes really speeds things up. My fast jog is set at 450ipm and it seems slow after running the machine for a couple months now. But yes your right on the feed rates, the fastest I've needed for my work has only been 120ipm so far not counting my spoil board surfacing which was 200ipm and for the hell of it I ran part of the program with a 200% feed rate override with no problem. I'm looking forward to seeing some videos of your machine in action when it's done. I especially want to see your mister in action, the system you designed is rad actually the whole machine is pretty rad. Great work!!

Dan

[Arjay]

Not to hijack your awesome thread, but speaking of rotating ball nuts, here is my design: https://youtu.be/iuAQnf6vSAA