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Messages - spaceman

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General Mach Discussion / Axis as Spindle?
« on: January 27, 2011, 07:13:10 PM »
Hi,

I'm currently making a 3D printer and was wondering if I could use mach3 to connect the extruders.  I want it to have dual heads and can't seem to figure out how to connect the second head.  If it was a single head I'd just connect it as a spindle.  But with 2 heads, I'm not sure what to do.  Can an axis be 'turned on' without any Gcode? Can Mach3 be configured for dual spindles?

Any insight is appreciated.

Space...... out!

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Promote and discuss your product / Re: Mach3 as 3d printer software
« on: November 04, 2010, 01:04:29 PM »
Quote
Can you tell me how you modified Skeinforge from the 'E' axis to the 'A' axis? I am already well into building a stand-alone 3d printer and this is the problem between Mach and Skeinforge I've run into. My feed steppers are on the 'A' axis and I need to change them.

There is no option for doing this in skeinforge so I modify the source code

Regards,
Nuri Erginer

I was hoping you could direct me to the plugin that you modified the source code.

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Promote and discuss your product / Re: Mach3 as 3d printer software
« on: November 03, 2010, 08:01:52 PM »
Can you tell me how you modified Skeinforge from the 'E' axis to the 'A' axis? I am already well into building a stand-alone 3d printer and this is the problem between Mach and Skeinforge I've run into. My feed steppers are on the 'A' axis and I need to change them.

I love your idea of interchangability!  I wish I had thought of that 6 months and several $$$ ago  :-[

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General Mach Discussion / Re: same switch for all 3 x axis requirements
« on: October 20, 2010, 11:03:17 AM »
I'm confused then.  I thought Home Off was merely a 'DRO offset'.  As the Home switches are at 0,0,0 without Home Off.  the DRO would read the same.  If I set Home Off. to  5,5,5 the head doesn't actually move this distance, correct?  How would that help?

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General Mach Discussion / Re: same switch for all 3 x axis requirements
« on: October 19, 2010, 11:24:27 AM »
After a day of diagnosing, from PC all the way to the switch.... it turns out I had a bad switch!

(paraphrasing) ARGH!

My next question about axis is this:
I hope to use Mach 3 for a 3D printer I'm making (Heated ABS plastic extrusion printing). But I'm stumped how to set up the Z axis home/limit.

For the printer to work, the head must be a very specific distance from the table for the first layer. As opposed to a milling maching, the print head will be stationary in the Z axis and the table will move up and down.  If the Mach 3 moves the table up to trip the switch during the Ref Home operation and then backs the table down until it is off the switch, during the first phase of Ref home (switch trip) the table will crash into the print heads.

Has someone out there already solved this?

My first edumacated guess would be to place a second thickness onto the first table with circular cut-outs of the print heads in the X-Y home position.  This would allow the dual thickness table to trip the switch, back off and be just the right distance for the first layer print. However, can I change the order of Ref Home axis in Mach 3.  I believe it does the Z first, which would defeat the whole idea.

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General Mach Discussion / Re: same switch for all 3 x axis requirements
« on: October 15, 2010, 06:02:08 PM »
You stated that the axis switches are in parallel.  I strongly recommend that
you change that configuration to a series configuration using the normally
closed contacts on the switches.  I think that will fix your problem. 

RWW


Are you concerned about the axis crashing if a switch fails or is there another reasone behind it?

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General Mach Discussion / Re: same switch for all 3 x axis requirements
« on: October 15, 2010, 10:33:46 AM »
The home function didn't work at all so the coords don't zero.  Mach 3 interprets the switch, even in the home function as a limit.

UPDATE: it now works in Ref Home because I set the debounce. I'm going to add capacitors to see if that quiets everything.


DBR549: the switches are in parallel

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General Mach Discussion / Re: same switch for all 3 x axis requirements
« on: October 15, 2010, 09:05:58 AM »
Thanks for the responses guys. Reading my OP, I realized I didn't quite word my setup correctly.  I have 2 switches for each axis.  One at ++ extreme and one at -- extreme.  Each axis is wired to a single pin.  X on 10, Y on 11, and Z on 12.  I just can't get the Home to work yet with this setup.  I did find a couple of articles about debounce and will play with that to see if it works and will report my findings.  Right now,  when I home, it only works if I disable ++/-- and have the switch active as Home.  If the ++/-- is enabled, the axis gets to home and then ( I'm guessing) the switch acts like a limit and triggers an Estop.

Thanks again!

Slainte Mhath Hood

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General Mach Discussion / same switch for all 3 x axis requirements
« on: October 14, 2010, 09:10:35 PM »
Can I set 1 switch for X++ and X-- and X Home?  I've tried to wire it this way with all three switches using one cable on Port 1/Pin 10 but can't get Mach 3 to Ref Home. The Limit function of the switches works but not the home.

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