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Author Topic: Boxford 160TCL  (Read 38742 times)

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Re: Boxford 160TCL
« Reply #30 on: April 23, 2008, 04:41:09 AM »
Simon.

You asked :-

"Does MACH3 turn the M3 & M4 output off again? I think I only need a 24v pulse to pull the changeover relay one way or the other."

As I understand it M3, M4, M5 are individually persistant on the assigned parallel port output pins, so say your G code sends M5 to stop the spindle, it stays stopped (active)untill an M4 or M3 is sent.

Ian

Offline SimonD

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Re: Boxford 160TCL
« Reply #31 on: April 23, 2008, 05:10:04 AM »
Ian
"Does MACH3 turn the M3 & M4 output off again? I think I only need a 24v pulse to pull the changeover relay one way or the other."

As I understand it M3, M4, M5 are individually persistant on the assigned parallel port output pins, so say your G code sends M5 to stop the spindle, it stays stopped (active)untill an M4 or M3 is sent.

So does M5 need a sepparate pin? or does M5 turn off the M3 and M4 pins?
Thanks
Simon
Re: Boxford 160TCL
« Reply #32 on: April 23, 2008, 06:47:30 AM »
Simon,

M5 does not need a pin it just turns off the M4 or M5 pin.

Ian

Offline SimonD

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Re: Boxford 160TCL
« Reply #33 on: April 23, 2008, 06:57:11 AM »
Attached are my current 2 options for the relays... I can't decide which is better...
The first one uses the original contactor and 2 new relays, the second, just 2 new relays.

Can anyone see any benefits to either? The only benefit I can see at the moment to using the original contactor is it frees up a set of relay contacts to use for a pair of direction LED's or to connect to the speed controller enable line which was just bridged in the original.



Re: Boxford 160TCL
« Reply #34 on: April 23, 2008, 10:01:16 AM »
Simon,

Simple is best for reliability and troubleshooting. You can always add auxiliary contacts to your chosen contactors.

Ian

Offline SimonD

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Re: Boxford 160TCL
« Reply #35 on: May 02, 2008, 05:48:07 PM »
I have now got the steppers running on the 203v's and am busy trying to set up MACH3.

I calculate the steps per mm to be 1000 which gives me a max speed of 1500 mm/min, MACH3 does not let me go any faster than that using 25khz kernel, should I change the kernel speed? The motors haven't started to complain about the speed yet?

Something doesn't seem right though, I am not used to being able to max out the speed before the steppers start to complain!
The only one which complained a bit was the turret!
What speeds should I expect to get from this little machine?

Thanks
Simon

Offline Graham Waterworth

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Re: Boxford 160TCL
« Reply #36 on: May 02, 2008, 07:54:23 PM »
I run mine at 2250/min X&Z @ 45Kz the turret runs at 500.

Graham.


« Last Edit: May 02, 2008, 07:56:08 PM by Graham Waterworth »
Without engineers the world stops

Offline SimonD

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Re: Boxford 160TCL
« Reply #37 on: May 03, 2008, 03:41:01 AM »
Ah, thanks, that is good to know that the machine is capable of those kind of speeds. I will play with the kernel speed when I have the rest of it working. I will also post some new pics when the wiring looks a bit tidier!
Re: Boxford 160TCL
« Reply #38 on: May 04, 2008, 03:40:33 PM »
Simon,

I run at 2532 mm/min using 45kHz and 24 volt power supply. More to come when I fit my 50 volt supply.

Ian

Offline SimonD

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Re: Boxford 160TCL
« Reply #39 on: June 28, 2008, 04:21:06 PM »
I have just about finished the lathe now and I thought I would update the post to complete the information, just in case anybody is interested...

In the end I used 3 Geckos, a CNC4PC C11G breakout board, a CNC4PC relay board and CNC4PC index board.