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Messages - n4807g

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1
The take up rolls could be driven but it wouldn't provide an advantage because the quilt matrix still has to be aligned when repositioned due to the stretching of the fabric. 
Thanks for the observation.

N4

2
Your projects are undoubtedly more complex.  This was about as basic as they come....

3
Finished adding 2 axis stepper control to my wife's long arm quilting machine.  Total out of pocket cost including HP Touchsmart computer and Art and Stitch digital design software about $4,000.  Took 10 days and I had a blast.  Smoothstepper and Mach3 made this project a snap...thanks to all who designed and maintain Mach3!!!!  Here's a link to my you tube.

http://www.youtube.com/watch?v=RWmdZi4BODM

PS...Innova's Autopilot CNC system costs $15,000 plus installation. 

4
General Mach Discussion / Re: Limit switches OEM trig
« on: January 17, 2011, 08:58:45 PM »
Problem solved......thanks everyone!

5
General Mach Discussion / Re: Limit switches OEM trig
« on: January 17, 2011, 12:01:04 PM »
Thanks Arturo, that explains my dilemma!

6
General Mach Discussion / Re: Limit switches OEM trig
« on: January 17, 2011, 05:32:47 AM »
By discrete I meant my switch arrangement is individually wired switches to inputs while you are suggesting a serial arrangement where three  switches are wired in series example: X--, X++, X home wired in series terminated at port 1 input 11. In my setup I have each axis with it's own switch wired to individual inputs. So I'm using 4 switches and 4 inputs, I'm not using home.  What I was suggesting (asking) is that in your arrangement when one switch is active all three inputs on port 1 change state while in my arrangement only one of the three change state does this matter?  I assume that any of the three X axis inputs changing state (when the switch is active) should stop the X axis motor.

I have wired the switches 5vdc common NC (didn't work), I've also wired them 5vdc common NO (didn't work).  I've changed the common to ground and used the same two wiring schemes..no change and I've also tried to change the setting to "Active Low" in the Port/Pin screen no change.

I'm using a C25 breakout board and SmoothStepper.  I believe the C25 sets all unconnected inputs to ground through a pull down resistor so all the inputs at Mach 3 would see low voltage.

Does Mach3 look at each assigned input and expect to see a high voltage and act on switch input changing the input from high to low?

7
General Mach Discussion / Re: Limit switches OEM trig
« on: January 16, 2011, 07:09:57 PM »
Thanks Hood.  I have the switches configured as you show them with the exception that I'm using discrete inputs for each switch.  I am assuming that your arrangement is used to conserve inputs, but even though I'm using individual inputs the result should be the same.  The only difference is I've set active low.  Since I can see the switch changing state in the diagnostic screen I'm also assuming that Mach3 can see and should act on the switch.

I'm using Smoothstepper and CNCP4's c25 breakout board. 

I'm pretty much at wits end because it seems like a simple circuit and the diag screen shows the switch changing state.... 

8
General Mach Discussion / Limit switches OEM trig
« on: January 16, 2011, 06:41:14 PM »
Seems impossibly easy but I have tried to set up x and y limit switches and they don't function properly.  I've assigned them port one, pins 11,12,13,15 enabled them and set them active low. I went to System hotkeys setup and assigned OEM triggers #1,2,3,4 the stop code 1003.  Here's my XML:

<OEM1>1003</OEM1>
  <OEM2>1003</OEM2>
  <OEM3>-1</OEM3>
  <OEM4>1003</OEM4>
  <OEM5>1003</OEM5>
  <OEM6>-1</OEM6>

when I check the pin state in the diagnostics screen (mach3 CNC Demo) I can see the switches changing state when activated..

However instead of stopping the motors they continue to run.  If I select the stop button on the screen they stop.

What am I doing wrong????

Thanks

9
Thanks for confirming what I thought.  The motors I'm using have an appreciable margin of error (+torque)  to compensate for possible missed steps scenario.

CM Johnson

10
General Mach Discussion / Does Mach use encoder feedback to update DRO's
« on: January 03, 2011, 01:14:24 PM »
Hi,

Just want to confirm what I have read about Mach DRO's.  I'm going to use Mach and Smooth Stepper in conjunction with stepping motors on a 2 axis system.  I have read that Mach is an "Open Loop" controller and I assume that means the DRO's aren't updated by external information (i.e. encoders) but rather they reflect the current position based on Mach's position output to the motors.  Is that correct?  I can forgo the encoders unless they will provide feedback that is accurately used by Mach.

Thanks for your help!

CM Johnson

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