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Author Topic: First CNC build  (Read 170 times)
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« on: July 13, 2017, 09:54:32 PM »

Hello all.  I am a brand spanking newbie to home CNC.  I never thought about it until 3 weeks ago when my fabrication hobby opted for CNC Plasma.  So I have built a controller here using 4 Gecko G214's (y slaved to a), ESS Smooth Stepper, MB2 BOB and THC3T THC up/dwn (installing npn prox sensors when arrive for home/limit).  The cables are Molex SJOOW shielded 18/4c with GX 20 5 pin I/O connectors and 4 Delta 150 cfm fans in a push pull arrangement.  All this in a Hoffman 20x20x8 nema enclosure. Just installed Mach3 a bit ago.  I think I understand.  Just configure I/Os to match my BOB.  Any input appreciated.  Never did this before 3 weeks ago. I'm this far by reading alone.  Thanks

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« Last Edit: July 13, 2017, 09:57:56 PM by aricannon » Logged
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« Reply #1 on: July 14, 2017, 12:51:46 AM »

Excellent work - that has the makings of a fine machine.

(Not a criticism just an observation...
I have never used those toggle connectors so don't know for sure but when you have it all up and running perhaps check that you don't get a voltage drop across the ones between the PSU to the Gecko's as it is generally always best to wire each Gecko's power lines direct to the PSU without any terminal blocks).


Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.

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« Reply #2 on: July 14, 2017, 11:40:02 AM »

Thank you for the encouraging words.  I didn't consider the IR  drop across those toggle terminals.  I never used them before myself.  I will certainly inspect losses under load to see if it is a factor.  They bite hard into the wire though.   I was surprised at how strong they grabbed.
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