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Messages - dacostad

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21
How would you connect the pod to say a Xylotex controller car?

Thanks


David

22
General Mach Discussion / Re: Charge Pump Problem
« on: January 11, 2007, 09:31:30 AM »
Do you know I don't remember, but I think it was user error.  Once I built the card into my pc case (see web.mac.com/dacostad) it all just worked as advertised.

23
General Mach Discussion / Re: Charge Pump Problem
« on: January 11, 2007, 01:29:39 AM »
Yes it works like a charm

24
General Mach Discussion / Limit switch reset
« on: December 31, 2006, 08:45:33 PM »
Hi all, I have just finished building my CNC Router ( check it out here http://web.mac.com/dacostad ) and in the process of adding my limit/ home switches.

I have a simple question - when an axis hits a limit switch, I have to hit reset and move the axis away from the switch (I have auto override set to on).  I have to reset at least twice to get it off the axis but I guess I need to change the debounce setting which is currently zero.  However, my problem is that to reset the axis I have to remember what way to turn my shuttlepro or what arrow key to hit and would like to just hit a button and have the axis move away a safe distance say 1".  Now I know the direction it has to move will depend on which end of the axis it is (each axis has a limit at each end wired in series, seperate pin per axis), but I figure that can be figured out depending on the value of the DRO.  Is something like this possible and if so how?

Thanks


David

25
General Mach Discussion / Re: Charge Pump Problem
« on: November 05, 2006, 07:58:44 PM »
I agree, Arturo has been very responsive and helpful.

I will let you know how I get on.


David

26
General Mach Discussion / Re: Charge Pump Problem
« on: November 05, 2006, 12:29:59 PM »
Hi Brett,  Yes I have already tried putting the jumper on pins 1 and 2 and wiring th 5v to EN and it all works fine, so it seems to be just related to the charge pump.  Arturo thinks it might be due to some tolerance issues with the Frequency between variance in the pc and components.

He is going to send me another board with a different batch of components to see if it makes a difference.

I agree with having an enable switch either way and I will be doing that.

David

27
General Mach Discussion / Re: Charge Pump Problem
« on: November 04, 2006, 07:02:16 PM »
Hi Brett,

I'll have to check whether I am getting 5v or 3.5v from the PC,  but I did change the usb Cable that Aruro sent with the board to one that was sheilded, but it made no difference.

It's interesting that after a re-boot and going into Mach 3 for the first time the Output Status light comes on, on the board and everything works fine, but when I leave Mach 3 and go back in it just flickers and the motor twitch and won't jog properly, with the only cure being a re-boot of the pc.

I have now tried it on a second pc with similar effect - except it goes straight to flickering.   I have also followed all the optimization tips and also trimed down XP to a minimum using XPLight.   It is running on a 2.6Ghz PC wit 1Gb of RAM and no other programs except for DeskCNC which I use with my IMService CNC Router.

The driver test looks good.

I think it may be noise but I am not sure where it is coming from.

I may end up giving up with the charge pump, but I would really like to see it working reliably and not having to re-boot the PC each time I leave Mach 3.

David

28
General Mach Discussion / Re: Charge Pump Problem
« on: November 04, 2006, 11:18:53 AM »
Tried that Graham, but did not make any difference.


David

29
General Mach Discussion / Re: Charge Pump Problem
« on: November 04, 2006, 10:17:48 AM »
Thanks Grahm, that was the problem, as I did not realize that you needed to do this when using the charge pump.    I have now done this and it works, but I still have a problem.

If I exit Mach 3 the charge pump works as expected and disables the output,  however if I then go back into Mach 3, rather than the Output Status light coming on, it just flickers and the motor "twitch" and wont jog properly.  If I re-boot the computer, it works properly again but only for the first time I run Mach 3, after that I am back to the flicker.

Does anyone have any ideas as to what is happening?

Thanks

30
General Mach Discussion / Charge Pump Problem
« on: November 03, 2006, 03:40:01 PM »
Hi all,

I have a Xylotex 3 axis board plus I am using CNC4PC Multifunction board.

I have tested the xylotex board and 3 motors with Mach 3 and it works fine.

I have connected the Xylotex board to the CNC4PC board (to the DB25 port labeled "Output" and the other DB25 port is connected to my PC.

I have connected the 3 required power sources to the multifunction card and I see the appropriate LED's illuminated.

I have gone into Mach 3 Config - Ports and Pins and on the output tab, I have set the line that says "Charge Pump" to be enabled and use pin 17 port 1.  I am not sure whether it should be set as active low or high ( I think high) but have tried both, but I still cannot jog the motors.   

What am I missing?


Thanks

David

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