Messages

581

Screen designer tips and tutorials / Re: wired toolpath and no idea why

« on: April 23, 2017, 06:13:37 AM »

M7, M8 or M9 (in MDI-input) - but not, when I hit the button, that should toggle cooling or mist

Compare the OEM button code used in  your modified screen  to the 1024 screen set buttons.

RICH

582

Screen designer tips and tutorials / Re: wired toolpath and no idea why

« on: April 22, 2017, 05:16:06 PM »

You could of just copied the xml you use for the 1024 screen set and renamed the copy to say, MSCREEN.
Then open Mach3 using MSCREEN, load your modified screen and save settings, exit Mach. Open Mach using MSCREEN and your new screen will be used but the settings should be the same as the 1024 screen profile. All that was done was to define what screen set to use.

RICH

583

Share Your GCode / Re: trouble making 8 lug spacer

« on: April 22, 2017, 05:08:35 PM »

Ok guys why do my small hole always look like hell on this thing ?

What thing you talking about? The "O" in the word ok looks fine to me.

RICH

584

Screen designer tips and tutorials / Re: wired toolpath and no idea why

« on: April 22, 2017, 06:40:18 AM »

Create individual profiles / xml 's for each screen.  Make sure configured  settings are the exact same. Don't just
change / load a different screen to test. See how it goes.

Seems like there is an offset in play when you loaded your screen. Check diagnostics immediately after loading the file in both screens and compare axis positions.

FWIW,

RICH

585

General Mach Discussion / Re: Scaling troubles

« on: April 22, 2017, 06:21:18 AM »

Forget about the picture.

So your using a router machine to "mill" and just let me say that
you probably do not have the rigidity of a milling machine.
Don't expect milling machine tolerances. The whole "system"
as applied to the machining task comes into play and is also dependant on the material your working with. So I will repeat "YOU have what YOU have" and it will only do what it can.

So do some testing both in the material you are working with, how the code is done, tool used, etc and see what it can do.

If you want better than what it can currently do then you need to look at each part of the system for possible improvement.

RICH

586

General Mach Discussion / Re: Scaling troubles

« on: April 21, 2017, 06:27:44 PM »

I am curious, can you post a picture of your cnc machine.

RICH

587

General Mach Discussion / Re: Scaling troubles

« on: April 20, 2017, 06:01:04 AM »

Use an indicator , preferably one that can measure to 0.0001", to measure the total run out.
Put a ground rod, drill blank, etc into the collet / chuck, rotate the chuck manually,
Measure both very near the collet / chuck and also at a distance approx. where the cutting edge of the end mill would be.

Do a few tests with your machine.

Mill a hole through some scrap for say a 1" dia hole doing a rough cut, a finish cut, and a spring cut in the kind of material you want an accurate hole to be milled. Measure the hole. If it's under than change  diameter of the end mill to something smaller in the wizard / cam and do it again. Say your under by .004" then change the end mill diameter  down by .002" or half what it is under.

That gives you a practical idea of how good the system is how to adjust for YOUR machine.

Easier would be to do the hole with code based on the center line of the hole and start point of the first move from the same location.

That takes into account everything. You have what you have, just need to consider what you can do with it and how to adjust to get what you want.

RICH

588

General Mach Discussion / Re: Scaling troubles

« on: April 19, 2017, 05:55:55 PM »

There are number things that affect the accuracy.
How accurate do want want the 1" hole to come out?

1. What are you steps per unit for the axes?
   Say it's 20000, then best possible resolution would
   be  0.0005". Also the axis needs to calibrated correctly.

2. How accurate is your machine in both axis when actualy
   moved at the location where the 1" hole is done?
  
   ? Any backlash, don't say none, it's just a matter of    degree!

3. How did you measure the diameter of the tool?
   I use V anvil mic's as they are accurate and made for       that purpose.

4. How much run out do you have at the end of the mill?

5. How is the coding done? ie; mltiple cuts, spring passes,
   etc.

If everything was perfect and the code was correct then the hole would be correct, BUT , that is not the case in the real world.

BTW,
If the hole comes out under then in cam you can just change / adjust the tool diameter ( same tool ) as the machine knows no difference!


RICH

589

G-Code, CAD, and CAM discussions / Re: mach 3 tool offset issue

« on: April 18, 2017, 06:41:31 AM »

The attached file provides some info on cutter compensation and includes some
posts by Graham and Gerry.

There is a lot of info on cnc programing  but You may want to consider purchasing CNC Programming Handbook by Smid.


RICH

590

Share Your GCode / Re: trouble making 8 lug spacer

« on: April 18, 2017, 06:11:21 AM »

Have you looked at any of the wizards?

RICH