Messages

1

Tangent Corner / Re: Controlling micro servo with Mach3

« on: July 06, 2021, 02:39:04 PM »

Again, thanks a ton for your responses, insights and recommendations.

2

Tangent Corner / Re: Controlling micro servo with Mach3

« on: July 03, 2021, 03:47:04 PM »

OK, I just found a couple of videos on YouTube from LogiCNC from 8 years ago, but that's all I've found....so far!  Any additional help you can provide is appreciated.

3

Tangent Corner / Re: Controlling micro servo with Mach3

« on: July 03, 2021, 03:36:56 PM »

Thanks Tweakie.  I've read through your documentation and I'm not too proud to admit that this is waaaay out of my wheelhouse, but It's awesome to have a solution.  I tried to follow the link embedded in your documentation for an off-the-shelf controller (http://www.logicnc.com/rcnc.html) but unfortunately it's not active.  I googled logicnc but didn't find anything.  Can you provide me with other ready-made controllers? 

4

Tangent Corner / Controlling micro servo with Mach3

« on: July 03, 2021, 01:47:59 AM »

I want to control a Tower Pro SG90 micro servo using Mach3.  Before I dive in and start experimenting I thought I'd reach out and see if anyone has done it or has an idea how to do it.  I'm thinking it might be as simple as using the Mach3 spindle controls and just connect the signal terminal for the servo to the step pin of the controller (like a Gecko G-320x).  Anyway, any insights would be appreciated.

5

General Mach Discussion / Re: Tangential Control

« on: February 23, 2016, 03:36:02 PM »

Thanks.  I have tried coding just XY moves while relying on Mach3 to provide the tangential control of the A axis.  The resulting movement is very jerky.

I have not tried to compute the associated angle (hypotenuse leg) of each XY pair and add that in to each XY move command.

6

General Mach Discussion / Re: Tangential Control

« on: February 23, 2016, 01:47:11 PM »

Here is some example code.  The behavior is at the two lines "G00 Z0.0000", which I've separated with spaces from the rest of the code.

G00 G49 G40.1 G17 G80 G50 G90
G20
(2 1/2 Axis Profiling)
G00 Z0.0000
X-1.2292 Y-0.3717
G01 Z-0.3000 F100
G17
G02X-0.1397Y-0.5086I0.5129J-0.3220 F100
X-0.4167Y-1.4766I-0.7741J-0.3020
X-0.7216Y-1.7075I-5.2693J6.6393
G03X-1.2241Y-2.2658I1.2598J-1.6394

G00 Z0.0000

X-1.2586 Y-2.2238
G01 Z-0.3000 F100
G03X-2.0651Y-1.4633I-2.4982J-1.8414 F100
G02X-1.9607Y-0.1278I0.4639J0.6355
X-1.1878Y-0.4262I0.2264J-0.5639

G00 Z0.0000

A0
X0 Y0
M30

7

General Mach Discussion / Tangential Control

« on: February 22, 2016, 02:46:14 PM »

Hi.  I'm trying to control a cutting knife using the Tangential Control feature in Mach3.  

Everything is working well with one exception; at corners in the cut geometry, where the A axis needs to re-position to be tangent to the upcoming XY move, the Z lift and A re-position are a blended movement.  

Normally, as with a true milling operation, this isn't an issue but in this case the knife I am using has an offset blade tip.  So, when the Z begins to lift and the A begins to rotate, the tip of the blade is dragged through an arc gouging the material.  What I need to for the Z axis to lift to zero and then rotate the A.  

I can't figure out how to do this.  Any ideas out there?  

Thanks.