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Author Topic: Yet another newbie...  (Read 2849 times)

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Yet another newbie...
« on: June 15, 2006, 05:20:14 PM »
Hi All,

Like many here I have recently completed a router.  I am using Gecko G202's and Mach 3.  At present I can home all axes, and jog around like crazy, but getting the system to draw a picture of that d@#m roadrunner is still elusive.  Perhaps my problems are due to the fact that although I have been a machinist for many years, I have no CNC experience. 

The system details: X axis approx. 16" travel, Y about 12" and Z 4".  X is driven by a NEMA 34 Pac Sci stepper and Y and Z are driven by NEMA 23 Pac Sci steppers.  The Y axis is a second hand Linitech drive (very nice), but most of the rest is garage made.

Although I have read the manual for Mach 3 and have viewed all the tutorials up through Coordinates/Homing (and they are great), I'm still having some problems and have many questions which I hope someone can help me with:

1) Is it normal to have an axis drive whine/hum/whistle while it is idle?  If I jog the axis it will change the sound or stop completely.

2) From the Coordinates tutorial it sounds like I should be able to home the axes, the DRO's auto zero, then jog to the corner of my sheet of paper, manually zero the DRO's, regen the toolpath and then run the roadrunner program.  When I do this, the pen does not stay within the boundaries of the sheet of paper.  Maybe I need to jog to a different point on the paper, or do I need to do something on the Offsets screen?

3) Should the highlighted line on the program window always follow along with the program as it is executed?  Mine does sometimes, sometimes not.  (not a big issue, but it makes me wonder)

4) Is there a library of sample programs that might be better than the roadrunner for determining system correctness, or do I have to write these myself?  Perhaps use some of the wizards to generate circles, squares etc?  What type of geometric pattern would be most usefull to excercise my system?

5) Is there another way to save the global configuration rather than going into the Mach folder and copying/saving the profile?  Seems like there should be an option under the File menu...(again not a biggie)

6) Is the settings for the softlimits (Motor Home/Soft Limits) the only place that I need to tell Mach about the size of my system?

7) Although I believe that I have correctly set my Steps per Unit for each drive on the motor tuning screen, when I try and verify/fine tune them using the "Set steps per unit" button on the settings screen, I get VERY different numbers.  Perhaps it is because I am only asking for pretty small movements to stay within the limits of my 1/2" travel dial indicator?  Is there a way to control the feedrate that this test uses?  It seems to ignore the feedrate selection on the program run screen?

Phew, that is a lot of questions already!  I appologize in advance for my ignorance in this area, but I'm eager to learn.

Thanks in advance for any help you all can provide...
Re: Yet another newbie...
« Reply #1 on: June 15, 2006, 05:22:17 PM »
Wow, the pic turned out to be HUGE!  Sorry about that!

R/L

Offline Graham Waterworth

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Re: Yet another newbie...
« Reply #2 on: June 15, 2006, 07:18:41 PM »
Hi,

The motors when still will hum, this is normal.

If you want to test your movements then here is a small program to try out.

Set an A4 sheet of paper in the middle of your table with the long way front to back,  zero out the X & Y axis in the middle of the paper, draw a cross corner to corner to find the middle.  Then set the pen so it is just touching the paper. Zero out the Z axis DRO.

Cut and paste this program into notepad and save it as test.tap

Load the program into Mach3 and run it

The program will draw a square a circle and some text to tell you the size it had drawn, check the size.

Graham.

(TEST PROGRAM)

G21 G40 (METRIC)

N1 (FELT PEN)
G00 G90 Z25.
X-100. Y-143.5
G00 Z1.
G01 Z0. F200.
G01 X100.
G01 Y143.5
G01 X-100.
G01 Y-143.5
G00 Z25.
G00 X0. Y100.
G00 Z1.
G01 Z0.
G02 X86.613 Y-49.982 R100.
G02 X-86.613 R100.
G02 X0. Y100. R100.
G00 Z25.
G00 X-100. Y120.424
G00 Z1.
G01 Z0.
G01 X-7.839
G00 Z25.
G00 X7.839 Y120.424
G00 Z1.
G01 Z0.
G01 X100.
G00 Z25.
G00 X-95. Y119.591
G00 Z1.
G01 Z0.
G01 X-100. Y120.424
G01 X-95. Y121.258
G01 Y119.591
G00 Z25.
G00 X95. Y121.258
G00 Z1.
G01 Z0.
G01 X100. Y120.424
G01 X95. Y119.591
G01 Y121.258
G00 Z25.
G00 X-79.814 Y143.5
G00 Z1.
G01 Z0.
G01 Y3.766
G00 Z25.
G00 X-79.814 Y-3.797
G00 Z1.
G01 Z0.
G01 Y-143.5
G00 Z25.
G00 X-80.647 Y138.5
G00 Z1.
G01 Z0.
G01 X-79.814 Y143.5
G01 X-78.98 Y138.5
G01 X-80.647
G00 Z25.
G00 X-78.98 Y-138.5
G00 Z1.
G01 Z0.
G01 X-79.814 Y-143.5
G01 X-80.647 Y-138.5
G01 X-78.98
G00 Z25.
G00 X50.104 Y-86.543
G00 Z1.
G01 Z0.
G01 X2.206 Y-3.811
G00 Z25.
G00 X-2.18 Y3.766
G00 Z1.
G01 Z0.
G01 X-50.104 Y86.543
G00 Z25.
G00 X-48.32 Y81.798
G00 Z1.
G01 Z0.
G01 X-50.104 Y86.543
G01 X-46.877 Y82.633
G01 X-48.32 Y81.798
G00 Z25.
G00 X48.32 Y-81.798
G00 Z1.
G01 Z0.
G01 X50.104 Y-86.543
G01 X46.877 Y-82.633
G01 X48.32 Y-81.798
G00 Z25.
G00 X-3.256 Y117.924
G00 Z1.
G01 Z0.
G01 X-6.589
G02 X-5.756 Y119.424 R1.762
G01 X-3.867 Y120.591
G03 Y122.702 R1.222
G03 X-5.756 R1.993
G03 X-6.367 Y121.869 R1.19
G00 Z25.
G00 X-1.559 Y118.477
G00 Z1.
G01 Z0.
G03 X0.997 R1.637
G03 Y122.311 R3.044
G03 X-1.559 Y122.31 R1.637
G03 Y118.477 R3.044
G00 Z25.
G00 X3.355 Y118.477
G00 Z1.
G01 Z0.
G03 X5.91 R1.637
G03 Y122.311 R3.044
G03 X3.355 Y122.31 R1.637
G03 Y118.477 R3.044
G00 Z25.
G00 X-82.831 Y-2.5
G00 Z1.
G01 Z0.
G01 X-86.164
G02 X-85.331 Y-1. R1.762
G01 X-83.442 Y0.167
G03 Y2.278 R1.222
G03 X-85.331 R1.993
G03 X-85.942 Y1.444 R1.19
G00 Z25.
G00 X-79.322 Y0.116
G00 Z1.
G01 Z0.
G03 X-78.766 Y0.505 R2.166
G03 Y2.06 R1.08
G03 X-81.211 R1.909
G03 Y0.56 R0.981
G03 X-79.933 Y0.171 R1.699
G02 X-78.655 Y-0.218 R1.699
G02 Y-2.107 R1.175
G02 X-81.322 R2.236
G02 Y-0.218 R1.175
G02 X-80.544 Y0.227 R3.569
G00 Z25.
G00 X-77.075 Y2.503
G00 Z1.
G01 Z0.
G01 X-73.464
G01 Y2.225
G03 X-75.741 Y-2.497 R5.69
G00 Z25.
G00 X-9.589 Y-2.5
G00 Z1.
G01 Z0.
G01 X-4.589 Y2.5
G00 Z25.
G00 X-7.089 Y2.
G00 Z1.
G01 Z0.
G02 X-5.357 Y-1. R2.
G02 X-8.822 R2.
G02 X-7.089 Y2. R2.
G00 Z25.
G00 X-0.256 Y-2.5
G00 Z1.
G01 Z0.
G01 X-3.589
G02 X-2.756 Y-1. R1.762
G01 X-0.867 Y0.167
G03 Y2.278 R1.222
G03 X-2.756 R1.993
G03 X-3.367 Y1.444 R1.19
G00 Z25.
G00 X1.441 Y-1.947
G00 Z1.
G01 Z0.
G03 X3.997 R1.637
G03 Y1.886 R3.044
G03 X1.441 R1.637
G03 Y-1.947 R3.044
G00 Z25.
G00 X6.355 Y-1.947
G00 Z1.
G01 Z0.
G03 X8.91 R1.637
G03 Y1.886 R3.044
G03 X6.355 R1.637
G03 Y-1.947 R3.044
G00 Z25.
M30

Never give up, time will pass, the cloud will clear, the sun will shine once more.