Messages

11

General Mach Discussion / Re: build a real cnc

« on: November 13, 2009, 05:49:56 AM »

  you do not need external motion controllers/cards etc to run full size machines...

I have VMC with 15kW spindle and 2,5kW DC brush servos in X and Y, Z axis I have 5Kw servomotor but drives I use are only able deliver about 4kW power.
For now all of these are running from paraller port and Koyo DL06 PLC.
This setup I have been running 4433 hours ( just checked from maintenans hours) with better reliability than many new cheap commercial machine!

To run these big servos you need commercial drives, not hobby size or quality,
OK Gecko is industrial quality but small power use only...
big or small depeds who you ask, in some commercial applications less than 10 kW per axis is small =)

I use Copley Controls drive "Xenus XTL" witch can be used to drive AC or DC brushless or brush motors..
http://www.copleycontrols.com/Motion/Products/Drives/Digital/index.html
These drives accept directly step/dir or analog commands and accept 110/220V AC power as power supply... no need capacitors etc..
One neat feature is double encoder loop whera you can use encoder signal from motor for tight PID loop and secondary encoder signal from linear scale for accurate position loop....
ok these are lot more expensive... about 800 euros each,  but... THE POWER!! =)

Regards Mika

12

General Mach Discussion / Re: Tool numbers and lengths

« on: December 19, 2008, 01:22:01 PM »

You can check the license from help menu, under About Mach3...
If license is ok you will have your name in box licensed to:

At tool leght comp I am unable to test but from memory I think you need M6 in tool number line eg. T1 M6.

Regards Mika

13

General Mach Discussion / Re: Turn Z part offset

« on: September 23, 2008, 03:31:32 AM »

You could use MDI and type G55 to get new work offset active.
In turn screens do not have work offset button to be able manualy edit work offset register like mill, but you could change active offset register using MDI.

When you start Mach it have G54 offset active and first you set your master tool X0 Z0
Next ghange G55 active and reset X0
Change back G54 active and move X to safe to avoid collisions
Make move you want to be your next location eg. Z-0,75
Change G55 active and reset Z0
Now you have two different work offset you can change in program using G54 and G55.
I think in Mach you can have 255 different work offset if you want from G54 to G59 and G59P1 to G59P254

Regards Mstcnc

14

G-Code, CAD, and CAM discussions / Re: cadcam purchase

« on: September 22, 2007, 05:26:19 AM »

With endless funds..

My choice would be Catia V5 Advanced machining..
One seat is about 90k$ + 15% yearly maintenance, but the software is very good.

Mstcnc

15

Mach3 and G-Rex / Re: G100, Mach3: What's features are not working?

« on: June 10, 2007, 10:31:42 AM »

What about backlash comp? is it workin with G100...
I would otherwise test it but damn wiring change from pport to G100 takes too much time.

Regards Mika

16

Competitions / Re: ******Guess and win a G100 Grex******

« on: May 22, 2007, 09:28:06 AM »

So easy.....

2,712,143

17

Mach3 and G-Rex / Re: MachIV motor reversal ?

« on: May 06, 2006, 07:29:04 AM »

Thank you,

That worked, now I must try loan a camera somewhere ( did broke my own ).
Must make video, I just tested my VMC shizuoka: 3mm thick cut in 50mm width in steel with feedrate of 300mm/min.

Regards Mika

18

Mach3 and G-Rex / MachIV motor reversal ?

« on: May 05, 2006, 04:28:59 AM »

Hi,

I need to have Z axis direction reversed, DRO´s and jogging are ok but machine movement is wrong direction.
In Mach3 you could just set dir pin active low to change direction but it does not change direction in MachIV? am I missing something, are pin settings not effective in MachIV?

Thank you,

Regards Mika

19

Post Processors / My notes for 5 axis post

« on: February 07, 2006, 12:58:02 PM »

In attachement I have compiled information I have collected for my 5 axis postprocessor.
My machine is gantry with 2 axis head.
Head have B axis (rotates around Y axis) and C axis (rotates around Z axis).
I did choose easiest way and did make adjustable head geometry so that B and C axis intersections eachothers, this way it is only needed to calculate X, Y and Z axis transformation according tool tip distance from pivot point and rotary axis angles.

Some problems are still not solved eg. tool tip following error changes according tool lenght.

Regards Mika