Messages

591

General Mach Discussion / Re: Lazycam/ Cams

« on: April 18, 2017, 06:10:01 AM »

That's a lot of holes to be drilled.
Maybe consider breaking up the program into a smaller repeatable program that would be reliable.

RICH

592

Building or Buying a Wood routing table.. Beginnners guide.. / Re: Cant Figure out Rotary Axis

« on: April 17, 2017, 05:59:27 AM »

Glad your off  to having fun again.

RICH

593

Building or Buying a Wood routing table.. Beginnners guide.. / Re: Cant Figure out Rotary Axis

« on: April 16, 2017, 07:23:30 AM »

A rotary axis can be configured as linear or angular and is defined in
General Logic Configuration under Angular Properties for the  axis.

In motor tuning for the rotary axis the Steps per are defined as
"Steps per degree" for angular configuration. If linear then the steps per degree
are relative to linear travel per degree for a cirular object ie; Diameter x pi=
the circumference and that would be the linear distance for 360 degrees.
 
You can use the axis calibration feature ( Settings Alt6 ) tab for a rotary axis.

You need to calculate the steps per for the rotary and should take into consideration gear reduction and  micro stepping,of the axis.

Velocity and accel settings are  trial and error just like any axis.

As far as the other programs read the manuals for them.

RICH

594

Mach3 under Vista / Re: Mach3 Axis Calibration Mystery

« on: April 15, 2017, 11:18:50 AM »

Tweakie,
I agree it's not a Mach problem.

Did a quick try of the posted WOODWAVY SECTION 1A.dxf and generated
a profile code for the complete dxf from Cambam and no arc problems here.
See attached screen shot QUICK TRY RICH.

-------------------------------------------------------------------------

Anders,
Suggest you try generating code for just a small part of dxf
in Cambam.That makes it easier to look into what the problem may be.
ie; see SMALL PART OF DXF pic attached as an example.

The code for that pic is attached....TEST3 RICH.
It is just the a small part of your original nc file and
just added line numbers and commented out the problematic lines
280, 290, 310, 320.Note that there is no problem with most of the code.

If the g2 or g3 coding is not correct you can get crop circles etc.
and that can be due to number of things.

You can compare how it's drawn and how Cambam interprets each arc or line
if you have the time and want to investiagte. Cambam provides info on each
arc and line of the drawing. 

Suggest you  quickly generate code for a profile (with and with out offsets) and engrave and see how it goes.

Take Care,

RICH

595

General Mach Discussion / Re: 'Spindle speed averaging' setting not saved

« on: April 14, 2017, 08:27:01 AM »

How to use xml backup in Mach3? I haven't been done that before.

Each time you change a profile a backup is automatically created and settings are saved in the xml file.

RICH

596

General Mach Discussion / Re: microstep switch explanation request

« on: April 14, 2017, 08:21:15 AM »

Michel,

Also a stepmotor is built 1.8degre 200step. so it can not give a nice cutting curve, for that reason we used a stopper contrôler with many range 2-4-8-16-32-etc for having more angle and more stepcutting ?  is it ok what i say?

No, there is more to it than that, go back and STUDY what is on the Gecko site.

Micro stepping is just rotating the rotor a fraction of a full step and thus
how accurately it can position is limited by all the components of the axis.
Say the axis steps per unit are 20000. Then the theoretical resolution of that axis is 1/20000=0.00005" but doubt very much if you will achive that. If you want to increase the position accuracy then use gearing or a 400 step stepper
for a given screw. Remember that "all components" of the axis system must satisfy the accuracy desired.Also remember that velocity and torque will be affected.

So try jogging the axis in 0.0001" increments and see what the DRO is saying as compared to actual measurement of the move.

On the practical side.........
1.Make sure the steps per unit are correct for the longest possible axis move.
  Make sure any backlash was removed before using the axis calibration feature.
2.Now tune the axis by setting the velocity at say 10 and an accel of 1.
  - just double each value until the axis skips
  - then reduce the values by say 30% ie; if it skipped at say 100 ipm then reduce      velocity to 70 and accel to 7 and refine
  That wil get a reasonable setting for the axis and can refine with experience
  when running or testing doing different tasks.

Also when you say tuning 30% below, is it the value on z Axis ? or is it the value i gave in the toolpath vacarme?

Answer is in above

Remember i want to do the right thing ans also understanding why i am doing this or this.

Understand, but you need to learn more on your owne. Books have been written on the stepper.
  

RICH

597

Mach Screens / Re: Change buttons in active work offset

« on: April 14, 2017, 07:32:52 AM »

You may want consider creating some buttons such that you can select, alter, save the offsets.
Attached pic show what was added  for my lathe screen. You will need to use a screen editor like Machscreen to do.

RICH

598

VB and the development of wizards / Re: Surface grinder programming (aka, just getting started).

« on: April 14, 2017, 07:20:11 AM »

Alan,

Not much info on this site about coding or a wizard for surface  grinding that I can recall. A wizard was requested a long time ago  but it never got posted due to being purchased by someone.

I would think the best thing to do would be to create a wizard for grinding and that is more work and involved than you may think.
Also it is not as simple as one would think.
Like my friend at the shop who did all the grinding work with cnc controlled equipment said......anybody can grind something flat, but, do it to a dimensional tolerance and size, that's a different story!

BTW, Have a bench top Sanford surface grinder, it is sweet and does nice work. 

Keep us posted,

RICH
 

599

Mach3 under Vista / Re: Mach3 Axis Calibration Mystery

« on: April 14, 2017, 07:01:50 AM »

Anders,
Attached pic shows backplot of reply 25 posted nc file as compared to
the dxf. Notice that x axis is scaled in the code as compared to the dxf and also some stuff was not selected. I don't know what your doing in CamBam...........

I got the crop circles in Mach when the nc file was loaded.

Like Tweakie replied the file is not what you originaly posted.

Did you try the "original posted file" with correct config in version 062?

If you stay with the original posted info and solve the problem then
you can go on to more complicated stuff.


RICH

600

General Mach Discussion / Re: 'Spindle speed averaging' setting not saved

« on: April 13, 2017, 07:56:45 AM »

I'm just curious why before the rpm showed up and now is missing

We get a lot "it worked before and now it dose not" and the answer is:
What changes did you do in configuration or to the hardware from when it worked before.

Try an xml file that worked before. A backup to a changed xml is created in the Mach3/xmlbackups directory.
Copy one over to the Mach3 directory and rename the extension from xm# to xml.

RICH