Messages

931

Show"N"Tell ( Your Machines) / Re: Success! Mini Machining Center under Mach3 control - Video link

« on: April 12, 2010, 12:06:36 PM »

Good looking boards, Steve and the 4th axis is just professional!

How did you do the printings on the boards?

Daniel

932

General Mach Discussion / Re: Turn Eccentric Wizard

« on: April 01, 2010, 08:25:50 AM »

Agree with you, Graham.

Just curious how would look the code for a square? Looks like it's Sin and Cos minus some product of them with some relative parameter...?

Daniel

933

General Mach Discussion / Re: Turn Eccentric Wizard

« on: April 01, 2010, 01:57:09 AM »

The code is the easy bit the hard bit is getting a machine that can follow the code instructions,  you need the X or Y axis to be in sync with the spindle. 

Don't they both need to be in sync... but then from the nature of how Mach works, if you get one in sync, the other would be automatically in sync.

Then the code is generated using Sin and Cos of a selected arc length on a offset centre point, the Z movement is then divided into the number of cords.

If I see right, the part cut in the video is a square. I think using the method you suggest would cut a circle...?

If you make the conforming machine I will write you the code.

Ha..ha... thanks Graham. As you say it's the machine that is the hardest part, but I will remember your offer if I ever build/buy one

Daniel

934

General Mach Discussion / Re: Turn Eccentric Wizard

« on: March 31, 2010, 04:01:40 PM »

Looks to me like the Mazak has a Y axis unless its just an optical illusion.
Hood

It certainly has a Y axis, doesn't look like an illusion because the tool remains in contact (centre line) of the work. Any ideas how the gcode was made?

Daniel

935

General Mach Discussion / Re: Turn Eccentric Wizard

« on: March 31, 2010, 01:46:29 PM »

I did Phil. It is so very impressive! I have no idea what it takes to make the gcode for this part... Are there CAM packages that can handle such things?

Daniel

936

General Mach Discussion / Re: Turn Eccentric Wizard

« on: March 26, 2010, 02:22:33 PM »

Even if you work out the X axis speed issue, producing the gcode to cut the eccentric would be something far not obvious.

Daniel

937

General Mach Discussion / Re: Motor outputs????

« on: March 09, 2010, 11:13:05 AM »

You can define a spindle relay on one of the pins of the parallel port and then use a multimeter to measure the voltage on that pin and see if it actually changes when you command Mach to turn the spindle ON and OFF. This is one easy way to check your parallel port actually works.

Daniel

938

General Mach Discussion / Re: Cutting errors

« on: March 09, 2010, 05:58:10 AM »

Is the play you found along the axes? If so it's backlash. One way to measure backlash is to put a dial indicator aligned with the axis being tested, move the axis towards the dial indicator till it engages and read the value it shows, then program a move (say 1mm long) in the same direction, then program the same move in the opposite direction and read the value. The difference between the two readings is your backlash. Repeat this at several spots along the screw and see how it differs.

Daniel

939

General Mach Discussion / Re: Cutting errors

« on: March 09, 2010, 01:26:34 AM »

Hi Norm,

Also might be worth checking the backlash on your axes. Have you done this?

Daniel

940

Show"N"Tell ( What you have made with your CNC machine.) / Re: Custom Guitars

« on: March 09, 2010, 01:20:31 AM »

Looking professional! Very beautiful!

Daniel