Messages

21

General Mach Discussion / Re: Angular moves - choose direction?

« on: March 22, 2013, 06:16:34 PM »

Thanks TP, inc is good, and no, the saw will never run more than 360 degrees since it can't ;-)
So the stupid question is:-   is there a gcode for + or - or is it a setting in mach? I take it that "g0 B0" will run in the shortest route to zero?
Thanks for your help so far, Jason.

22

General Mach Discussion / Re: Angular moves - choose direction?

« on: March 22, 2013, 05:41:57 PM »

Software is not a work-around, or not much anyway. I have a five-axis cnc saw which will need software to calculate the offset of the sawblade relative to the cut. This makes it easy to track the whereabouts of the blade regardless of my dodgy gears. You see as the blade pivots and rotates it dis-aligns itself with the z-axis. Hope this is clear.

Anyway, back to the question, is there a way to choose positive or negative rotation within Mach?

23

General Mach Discussion / Angular moves - choose direction?

« on: March 22, 2013, 11:47:49 AM »

I have a worm gear where the spur has a notch taken out of it (robbed from a sattelite dish positioner and the notch i nthe gear housed a couple limit switches).
I have used this worm gear to build a rotary axis but my problem is that when I move the axis, I need to choose the direction in which to move so as not to drive the spur gear off of the worm.
I am writing custom software to track the location of the axis and write the g-code, but I am not sure how to get Mach3 to choose direction. All ideas welcome.

24

General Mach Discussion / Re: can I do this in mach3?

« on: March 19, 2013, 03:52:07 AM »

Hi Steve, I cannot view the picture since I do not have a yahoo account Any chance you can upload a pic?

25

General Mach Discussion / Re: Power supply help

« on: February 01, 2013, 05:58:38 AM »

Ok, I am starting to find details now showing two outputs connected together. A bit more googling and I will be there!
http://sound.westhost.com/project77.htm

26

General Mach Discussion / Re: Power supply help

« on: February 01, 2013, 05:22:01 AM »

Thanks Hood, I take it that is perfectly safe then to connect the output of each rectifier to a single capacitor?

27

General Mach Discussion / Power supply help

« on: January 31, 2013, 06:25:59 AM »

Hi guys, I have just bought a 1500VA transformer, 240v primary to 2x 33v secoondary, giving a rectified output of around 46vdc.
Now I get confused. I have assumed 1500va / 33v to provide 45.45 amps output, so I have bought a 50 amp bridge rectifier. Will this be sufficient or do I need a larger rectifier? 
If I need a larger recrifier, I have only managed to find 3-phase varieties with 5 pins. Can anyopne advise whether these can be used single phase, or recommend a suitable alternative please.

If it is of intereset, I am driving 3x  DSG3 8020 drivers which draw a max current of 20 amps each but unlikely to ever draw more than 40 amps. Is there device which could limit the output from the power supply to 40 amps if this is an option?

28

General Mach Discussion / Smoothstepper issue or PC?

« on: December 29, 2012, 02:06:34 PM »

Hi guys, I have been running USB smoothstepper for 3-4 months with no issues. Today the computer gives me a blue screen with the message "multiple irp complete requests" and after restart, mach3 will only talk to smoothstepper for a few minutes before it times-out and then I get blue screen again.
Is it likely to be smoothstepper (or my wiring) or could it be a PC issue?