Messages

5821

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

« on: May 18, 2012, 04:02:15 AM »

This text is 0.5mm high and engraved 0.05mm deep.

OK, it is not that good and would probably make a watchmaker cry if he saw it but the purpose of this (and the previous examples) was to test the accuracy of the prototype tool setter and so far, I am extremely pleased with the results.

I have taken on Stirlings suggestion of incorporating an over-travel switch (just in case) to operate a ‘limit’ input. This will involve a re-design of the PCB and the connecting cable, plug and socket will then need 4 wires instead of 3.

Something to keep me off the streets for a while. 

Tweakie.

5822

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.

5823

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.

5824

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.

5825

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.

5826

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.

5827

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.

5828

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 »

 

5829

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.

5830

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.