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Messages - rdean

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51
General Mach Discussion / Re: Newbie with newbie problem
« on: July 13, 2014, 05:55:20 PM »
Make sure you are using the correct post processor in V-Carve.  Mach2/3 arcs inches for inches

52
General Mach Discussion / Re: Z-Axis Home Problems
« on: May 30, 2014, 02:56:29 PM »
After doing a clean install is the M3 font still different then the rest?

Ray

53
G-Code, CAD, and CAM discussions / Re: Aspire 3.5 and Mach 3
« on: May 22, 2014, 12:52:16 PM »
Did you install the correct XML file from the old computer?
If you had a custom named configuration it will have a different name and that is the one you want.

Ray

54
General Mach Discussion / Re: Y AXIS with 2x Ball Screw Alignment
« on: April 29, 2014, 08:43:01 PM »
OK the most likely reason for the in balance between the screws is from belt stretching.  I commend you on having built a very excellent adjusting system but there is still a stretch on the drive side of the belt.  

Everything else being the same if the ball screws had been of 7.5mm pitch or about 0.25" per revolution the error would be reduced to slightly over 0.05mm.  Since it is not practical to replace the ball screws then replace the belt pulleys.  

Increasing the belt pulley diameter to say twice that or 2" would make the belt travel farther to get the same result of screw movement.  Since the load or work done by the belt is the same then the belt stretch would remain the same but the error would be reduced significantly.  I will have to do some calculations to tell you actually how much but at first thought it would be 0.025mm.

Ray

55
General Mach Discussion / Re: Y AXIS with 2x Ball Screw Alignment
« on: April 29, 2014, 07:16:00 PM »
If I understand correctly you have a deviance of 0.1mm or about 0.004" between the movement of Y axis sides.  

What is the pitch of the ball screws?
What is the diameter of the belt pulleys?

Ray


56
General Mach Discussion / Re: Mach3 and second parallel port card
« on: January 14, 2014, 07:26:33 PM »
I have the same problem did you ever find a solution?

Ray

57
General Mach Discussion / Re: cabinet design
« on: November 21, 2013, 01:01:46 AM »
The computer components will be mounted on the removable back plate not shown.  The box, purchased locally, comes from Spain I believe as the label was cutup when I installed the monitor.  I will be installing cooling fan with filtered inlet air.
 
Ray

58
General Mach Discussion / Re: cabinet design
« on: November 19, 2013, 07:37:28 PM »
Mark4 I too am building a new control cabinet for my next mill project.  It will contain all electronics, computer and three Allen Bradley servo drives.
Thanks
Ray

59
General Mach Discussion / Re: Auto Squaring Gantry
« on: November 13, 2013, 08:23:42 PM »
I don't have a video but this is the way it works for me.

Z axis moves up or positive until it hits the limit switch and then reverses back down until off the switch.

Y axis moves in the negative direction until it hits the limit switch then reverses positive until it is off the switch.

X and B axis move in the negative direction together until one of them hits its limit and both motors stop.  The side that hit the limit first moves in the positive direction until it is off the switch.  Then the other side starts moving negative again until it hits its limit switch and then stops and reverses to get off the switch.  (This sequence is dependent on which side hits its limit first)
This is the Ref All Home script that I am using and it sets the work and machine coordinates to "0"

DoButton( 24 )
DoButton( 23 )
DoButton( 22 )
DoButton( 26 )

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

Notice here I am slaving the X and B axis together.  If you ever plan on running a rotary axis it has to be designated as the "A" axis for the rotational feed rate to work so  
I would suggest you set up your slave drive as "B" now to save problems later.

In the ESS setup screen under "Noise Filtering of Inputs" you may have to set a debounce time for the "Limits" and "Home" boxes to make it work properly.  
The ESS controls the debounce now not Mach3.  (Mine are set to 5 in each)

You should already have the "Motor Home/Soft Limits" ( this is where you set the ref speed and distance the drive reverses off the switch)  set up in Mach3 before running the script.
Each of my axis have their own limit switch and are on separate inputs.

I probably have forgotten something since it has been 2 years since I set mine up but it would be a good idea to "Step" through the script one line at a time for safety.

Ray


DoOEMButton(135)

60
General Mach Discussion / Re: Auto Squaring Gantry
« on: November 13, 2013, 06:32:02 AM »
I am using the ethernet smooth stepper for squaring my gantry with no problems.

Ray

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