Messages

5741

General Mach Discussion / Re: z axis loosing steeps

« on: May 18, 2012, 01:13:01 AM »

Hi Dan,

This problem is probably caused by something mechanical.

Not enough output torque from the stepper motor.

Binding or tightness in the z axis (generally the lead screw and nut) or alignment of the motor / screw through the coupling.

Tweakie.

5742

Tangent Corner / Extremely clever electronics.

« on: May 17, 2012, 12:20:37 PM »

For anyone interested in electronics this video is well worth watching.

It is not a ‘fake’ video, it does exactly what it is shown to do – the ‘trick’ is in the fact that there are a lot more electronics, comprising the circuit, than are visible to the eye.

http://acidcow.com/video/32323-unbelievable_6_leds_chain.html

Tweakie.

5743

Show"N"Tell ( What you have made with your CNC machine.) / Re: Gunstocks!!!!!

« on: May 17, 2012, 01:57:41 AM »

Excellent work Jugster, superb surface finishing.

Tweakie.

5744

FAQs / Re: Mach3 cannot see input ports

« on: May 16, 2012, 02:52:32 AM »

Hi Razorab,

Have you set the particular input pin (13) in Mach as 'Active Low' ??

Tweakie.

5745

Show"N"Tell ( What you have made with your CNC machine.) / Re: Constructing a Low Profile Tool Height Setter.

« on: May 15, 2012, 10:43:49 AM »

 

Tweakie.

5746

Show"N"Tell ( What you have made with your CNC machine.) / Re: Constructing a Low Profile Tool Height Setter.

« on: May 15, 2012, 10:27:57 AM »

Too cute, now if you can get that to fit and I can read it, between just two of those lines on that scale. 

LOL - top lines or bottom? - go on Tweakie - you can do it 

Ian

I know when I am beat    (but I haven't tried it using the laser yet)

Tweakie.

5747

Show"N"Tell ( What you have made with your CNC machine.) / Re: Constructing a Low Profile Tool Height Setter.

« on: May 15, 2012, 09:18:51 AM »

 

5748

Show"N"Tell ( What you have made with your CNC machine.) / Re: Constructing a Low Profile Tool Height Setter.

« on: May 15, 2012, 06:42:03 AM »

As always, Tweaks, your work is beautiful and so friggin clean! Love it!

Dave

Thanks Dave.

so your actual resolution and repeatability is?

Hi YNN,

That is a very difficult, if not impossible, question to answer. The difference between theoretical and actual resolution of any machine depends on just so many factors.

In practice, as you know, I do of lot of small engraving work which requires a high degree of positional accuracy but that does not necessarily mean that the work is done to a high degree of dimensional precision, after all, my machine is basically just a wood router but overall, when engraving, I expect to achieve a positional accuracy of better than ± 0.00625mm.

Tweakie.

5749

General Mach Discussion / Re: Charge Pump & Mach 3

« on: May 14, 2012, 06:36:29 AM »

Hi Dave,

Are you certain that the 12.5kHz output from Mach has been stopped or could it be that the C4 is just not recognizing it for some reason ??

Tweakie.

5750

General Mach Discussion / Re: Question about motor outputs

« on: May 14, 2012, 06:25:41 AM »

Hi SD,

If you imagine a square wave - active low will step (a little while after) the transition from the high point of the waveform to the low point of the waveform whereas active high will step (a little while after) the transition from the low point of the waveform to the high point of the waveform.
It is a preference of some driver chips to only operate reliably when this is set correctly (if they expect to see an active low input then this is what should be used).

Tweakie.