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Messages - Tweakie.CNC

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5801
General Mach Discussion / Re: PWM signal not showing correctly
« on: August 30, 2012, 11:56:06 AM »
Hi Andre,

My scope was set...

Y = 0.5 V/cm (10x Probe)
x = 0.5 mS/cm

(The PWM waveform is 5 Volt peak to peak with a pulse repetition frequency of 1 kHz).

Tweakie.

addition...   This post may be of interest to you http://www.machsupport.com/forum/index.php/topic,12444.msg155403.html#msg155403

5802
Show"N"Tell ( Your Machines) / Re: The Laser Project.
« on: August 30, 2012, 11:41:01 AM »
Hi Jeff,

I have been following your progress on the Vectric forum with great interest - Very nice work you are producing.

Art's Mach3 Impact / Laser plugin does just as you describe, producing the shades of gray by a PWM method of varying the laser on time. This is OK for certain materials (such as wood) but many other materials just do not accept shade.
After many trials and comparisons I prefer the half-tone method but, as you have shown, each method has it's own merits.

Tweakie.

5803
General Mach Discussion / Re: PWM signal not showing correctly
« on: August 30, 2012, 08:11:14 AM »
Hi Andre,

I am pleased to hear that you are making progress.

Just out of curiosity I thought I would take a look at the Mach3 PWM waveform (the setup was with a maximum pulley speed of 100).

The following pics show a 25% PWM as produced with the S25 command and a 75% PWM with the S75 command.

Tweakie.

5804
G-Code, CAD, and CAM discussions / Re: Increment Spindle RPM per Cut
« on: August 30, 2012, 03:27:52 AM »
Hi Joel,

If you are controlling your spindle speed via the Mach PWM output then spindle speed is set by the S*** command and changing speed just needs the insertion of a different S*** commands within the GCode as required.

Tweakie.

5805
Hi Nigel,

If you haven't done so already you should perhaps check out Gearotic Motion http://www.gearotic.com/
Art and Bob have developed a pretty easy to use gear design software and method of use for helical as well a spur gears (active forum as well).

Just a thought.

Tweakie.

5806
Tangent Corner / Re: F1gur471v3ly 5p34k1ng?
« on: August 29, 2012, 11:50:12 AM »
Hi Dan,

I must admit that I first tried to interpret it in text speak (M8 for mate etc.) but it is just not that subtle. Interesting nonetheless.  :)

Tweakie.

5807
General Mach Discussion / Re: PWM signal not showing correctly
« on: August 29, 2012, 07:38:37 AM »
Are you now seeing the PWM square wave from Mach3 on your scope ??

Tweakie.

5808
General Mach Discussion / Re: PWM signal not showing correctly
« on: August 29, 2012, 06:13:49 AM »
Hi Andre,

You are possibly looking in the wrong place with your oscilloscope. The PWM signal is on the Spindle Step Pin (as set up in Ports and Pins / Motor Outputs).

Tweakie.

5809
Tangent Corner / Re: F1gur471v3ly 5p34k1ng?
« on: August 29, 2012, 01:23:45 AM »
 ;D ;D ;D

Tweakie.

5810
Tangent Corner / Re: F1gur471v3ly 5p34k1ng?
« on: August 28, 2012, 08:34:36 AM »
Hi Russ,

P3RH4P5 7H47 3XPL41N5 WHY 4LL 7H3 G1RL5 L00K 50 G00D WH3N 7H3 B4R CL0535.  ;D

Tweakie.

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