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Messages - Vogavt

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191
General Mach Discussion / Re: incresing speed on stepper motors
« on: January 25, 2011, 04:21:33 PM »
I understand speed of the motors are controlled by velocity and acceleration. How do I make my motors go faster without them stalling on me? I see other machines cut really fast and mine seems slow in comparison when I see machines in videos.

If you don't have resonance dampeners installed you might want to look here and here.

I made and installed them for each axis and the difference is night and day.

Vogavt

192
General Mach Discussion / Re: 4th axis - GCode degrees vs distance
« on: January 25, 2011, 01:02:12 PM »
I did purchase CNCWrapper a couple of months ago. Great program but it doesn't allow Arc commands due to Mach limitations. All arcs must be converted to lines.

When I asked him about it he gave a good explanation as to why it wouldn't. Can remember the details, but it was Mach related, not his software.

193
General Mach Discussion / Re: 4th axis - GCode degrees vs distance
« on: January 25, 2011, 10:38:38 AM »
Resurrecting an old thread here. After reading through this I still need to get my mind around what it takes to work in the A-axis. I would ask that someone clarify my understanding.

Example One: If you are wanting to engrave a cylinder you could to set all the A-axis references in the gcode to Y-axis and simply tell Mach the diameter of the cylinder somewhere. My question is now I'm not sure how having the A-axis in angular or linear would then apply or even how to calibrate the steps per.

Example Two: If I'm wanting to drill four holes at 900 apart, I'd need to tell Mach that I'm wanting an angular setup and reference A-axis in degrees. Correct?

Example Three: To add even more confusion, how do I cut threads?

Still not clear on how to make the A-axis move at a reasonable rate when the other axes are moving.

I suppose I can see where I might need different profiles.


Could someone post a simplified explanation of how to set this up in Mach and where/what it applies to? I've read several posts now and like others have said "I'm more confused now than ever".

Thanks in advance,
Vogavt


194
General Mach Discussion / Re: homing and limit switches
« on: January 17, 2011, 10:11:53 PM »
Thank you!

195
General Mach Discussion / Re: homing and limit switches
« on: January 17, 2011, 09:57:10 PM »
DoButton( 24 )
DoButton( 23 )
DoButton( 22 )
DoButton( 25 )


DoOEMButton(133)
DoOEMButton(134)
DoOEMButton(135)
DoOEMButton(1025) 


So do I keep the blue or the red?

196
General Mach Discussion / Re: homing and limit switches
« on: January 17, 2011, 09:02:08 PM »

If you want to zero the A Axis after the homing then DoOEMButton(1011) should work fine.


Yes, I'm hitting the "Ref All Home" button (which is where I got the code from and posted in post #5).

Looks like I don't need all the information that's in there since I don't have encoders. Correct?

I simply added the DoOEMButton(1025) to the bottom of the list.

Thanks for taking the time to look at this.

197
General Mach Discussion / Re: homing and limit switches
« on: January 17, 2011, 07:47:06 PM »
Nope. Wasn't 1025.

I've got it hooked up and it rotates until it finds the new magnetic NC switch. Once it finds it, the table reverses until the switch goes closed again, but it won't zero the dro like the other 3 axis do.

Here's what I've got but it doesn't work. Any ideas?

DoButton( 24 )
DoButton( 23 )
DoButton( 22 )
DoButton( 25 )

DoOEMButton(133)
DoOEMButton(134)
DoOEMButton(135)
DoOEMButton(1025) 


I also tried (1011), but it didn't work either.



198
General Mach Discussion / Re: homing and limit switches
« on: January 17, 2011, 03:50:10 PM »
Yes, A-axis.  I believe I found it on the wiki as DoOEMButton (1025).

199
General Mach Discussion / Re: homing and limit switches
« on: January 17, 2011, 01:46:18 PM »
Quote
DoOEMButton(133)   ' Zero X Encoder
DoOEMButton(134)   ' Zero X Encoder
DoOEMButton(135)   ' Zero X Encoder

I may be stating the obvious, but shouldn't it be:

DoOEMButton(133)   ' Zero X Encoder
DoOEMButton(134)   ' Zero Y Encoder
DoOEMButton(135)   ' Zero Z Encoder


I was searching for a way to AutoZero my A-axis after the other three are finished. I don't want the rotary table to actually move, I just want it to zero after I manually hit a switch since I don't use it all the time.

BTW, do you happen to know what the DoOEMButton() is for the A-axis?

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