Hello Guest it is December 06, 2019, 01:58:03 PM

Author Topic: 1997 DYNA MYTE DM4800 VMC to Mach3 Conversion  (Read 100500 times)

0 Members and 1 Guest are viewing this topic.

Re: 1997 DYNA MYTE DM4800 VMC to Mach3 Conversion
« Reply #30 on: October 07, 2011, 06:17:27 PM »
JH are you going to use a PLC for the ATC this time or are you happy with the approach you used on your previous mill?

I appreciate you taking the time to post your efforts not only because it helps others to learn but because it is inspires many
people to complete their retrofits.

Keith

I like the logic and control in the control itself.  VB is easy to use and it provides access to all the core internals of Mach (ie eStop, User Interface Input, logging, ect )  For me, its easier to do it in VB M6Start.m1s and other Macros than a PLC ladder diagram.

Glad this helps,
JH

Re: 1997 DYNA MYTE DM4800 VMC to Mach3 Conversion
« Reply #31 on: October 08, 2011, 02:23:42 AM »
fot toolchange if you can use PLC, i think is better and safer
mach run in windows and it not safe %100

Amir
**Even a clock that does not work is right twice a day**

Offline Hood

*
  •  25,856 25,856
  • Carnoustie, Scotland
    • View Profile
Re: 1997 DYNA MYTE DM4800 VMC to Mach3 Conversion
« Reply #32 on: October 08, 2011, 04:00:48 AM »
I would think if you are using the PP then you will either have to use either electronic gearing in your drives or low count encoders on your motors. I personally would use an external device as it would mean pulserates would not be limited as with the PP.

As for VB versus PLC Ladder, personally ladder for me is much easier and much more powerful. Obviously macros are  still needed to talk to the PLC but they will be simpler affairs.

Hood
Re: 1997 DYNA MYTE DM4800 VMC to Mach3 Conversion
« Reply #33 on: October 08, 2011, 01:56:16 PM »
fot toolchange if you can use PLC, i think is better and safer
mach run in windows and it not safe %100

Amir


If your worried about windows mach3 and safety, then you shouldn't being using windows and mach3 for your axis control and user interface either.  Or mach3 at all ....  Just saying

Re: 1997 DYNA MYTE DM4800 VMC to Mach3 Conversion
« Reply #34 on: October 08, 2011, 02:33:49 PM »
the crash result in axis is for example :breaking tool (in addition,Finally drivers can stop axis with fault signal)
but in toolchange this result is very big and maybe Horrible accident
Amir
**Even a clock that does not work is right twice a day**

Offline cnc-it

*
  •  153 153
    • View Profile
Re: 1997 DYNA MYTE DM4800 VMC to Mach3 Conversion
« Reply #35 on: October 08, 2011, 06:42:13 PM »
Well I can see Amirs point of view but i've found Mach to be very stable and have never had it lock up mid proramme.

I'm with Hood on moving away from the printer port. That machine will really move if you want it too plus with something like the Galil controller you would get the closed loop back similar to what the Meldas would have had.

That said you can close the loop in the drive on the modern Mitsubishi drives and they will take step and direction signals from the pp.

But as far as I know anything bigger than 1KW needs 3 phase in on the Mits!

Found these on ebay..

 http://www.ebay.co.uk/itm/120587634024?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

Item number: 120587634024

They also do other sizes on there web sight.

John

Offline cnc-it

*
  •  153 153
    • View Profile
Re: 1997 DYNA MYTE DM4800 VMC to Mach3 Conversion
« Reply #36 on: October 08, 2011, 06:44:20 PM »
Btw those flexi couplings on your motors cost an arm and a leg if you need to change to new motors with different shaft sizes...just thought i'de mention it!
John
Re: 1997 DYNA MYTE DM4800 VMC to Mach3 Conversion
« Reply #37 on: October 09, 2011, 10:56:08 AM »
hi John
do you have any experience with Galil card+mach?
do we can to compare it with Meldas?

Amir
**Even a clock that does not work is right twice a day**

Offline cnc-it

*
  •  153 153
    • View Profile
Re: 1997 DYNA MYTE DM4800 VMC to Mach3 Conversion
« Reply #38 on: October 09, 2011, 02:31:55 PM »
Hi Amir
I am working on a mach set up with galil and Mitsubishi servos for a small mill. Not at the powering up stage yet though.
Have used mach with steppers though and it works well.
My full size machines all have Fanuc 6. I have no experience with meldas but the industrial controls in my opinion are very robust and the software never let's you down.  In fact its as bullet proof as you can get.
Although my Fanuc controls can't cut as fast as mach without losing accuracy they are better at doing back lash comp and closing the servo loop. Same goes for the meldas I expect.
John
Re: 1997 DYNA MYTE DM4800 VMC to Mach3 Conversion
« Reply #39 on: October 09, 2011, 02:39:31 PM »
john
about galil :Which series did you use?
**Even a clock that does not work is right twice a day**