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People do use that method, such as my build here;
http://www.mycncuk.com/forums/gantry-router-build-logs/6565-ready-steady-eddy-3.html#post50664

which actually turned out like this;...

Yep me but the smaller 2Nm they are brillant. See my video here. Leadshine Closed loop stepper - YouTube

These old Wadkins change hands on Ebay for around £1000-1500 and if you have the space they are a good buy in my opinion. I have seen some good mach conversions and for bulk processing stuff like...

In LinuxCNC you can specify a tolerance on the G64 command, so the controller sacrifices constant speed to maintain the toolpath within the specified tolerance. e.g. put 'G64 P0.05' at the begining...

Mach doesn't send Pulses it sends "DATA". . .Has in Trajectory DATA to the Motion control Card which use's this DATA and does some Complex Maths with it to then create "PULSES" which it outputs to...

Mach3 is only the limiting factor when using the parallel port and even then it's Not really Mach3 it's the Parallel port and it's driver.
When you use an external motion control card all these...

Silyavski If you are thinking of Linuxcnc and need to slave motor on one axis there is a problem with homing that has not been ironed out yet. See here LinuxCNC Support Forum :: Topic: Homing and...

Sorry, don't want to hijack the thread, but here is what i think.

I agree with all that Dean said. But the reason i am still digging for BOBs is axis count and money i would pay for what i would...

Yes, yes, they will change direction/the forces. But... on a typical router the bearings that move the gantry are spaced 260-300mm/including, if rectangular supported/. On a heavy duty, like my...

At the bottom of that drawing is Force D and Force C, these are are right angles to the rails.
With your proposal these forces would be along the rails, parallel to them and pointing in opposite...

reading this will answer your questions about the forces in play. what you suggest will not work , as you have to decrease moment B and the best way to do it is to increase distance D4.

11037

The Nema24 motors are 4mH/phase and ideally need 60v but are shipping with a 36v supply and 42v drives . The Nema23s are 3mH/phase and ideally need 55v and ship with 38v supply and 50v drives.
...

YES your not seeing plenty.?

First the only difference between Nema 23 & 24 is physical outer Dim 23=57mm 24=60mm both have the same Bolt centres so both can be used on same mount.

The...

As I'm sure you're aware, you can improve the response of a resonant system in just two ways - either raise the stiffness to reduce the magnitude of the deflection, or increase the damping so the...

I mentioned something similar to you in an email Jon and feel the machine would benefit from 1 more rail on both Y & Z axis. One Higher up on Y axis and on 3 sides of box on Z axis but more to help...

It's hard enough to align 2 rails let alone four. If you really need the higher load ratings, it's easier to just use bigger rails.



Soon. Sasha's still sorting them out but he's more...

For the machine in this thread, there would be no benefit - in fact it would probably make the machine worse. Larger stepper motors tend to not spin as fast, but output more torque. If the smaller...

[Please note this post is not quite finished - I will be editing it in the next few days to include costings among other things]

Just over two years ago, when I made the steel frame for my router...

I've been thinking about how to attach bearings and a timing pulley to a ballnut such that it can be rotated with a stepper motor, instead of rotating the screw.

I've already done this on my...

A Tutorial on motor torque calculations

A question oft asked on MYCNCUK is "how big a motor do I need?". There is no simple answer to this, and the options are usually:
a) follow someone elses...