The Shop > CNC
The basics
Will_D:
SoI will need steppers/drivers/psu so from the UK I see a nice priced package:
http://www.ebay.ie/itm/3-Axis-CNC-Kit-425oz-in-Nema-23-Stepper-Motor-Driver-CNC-Mill-Router-Lathe-/121787136378?hash=item1c5b14397a
Will the 425 oz N23's be up to the SX2P?
I'm sure X & Y will be fine but what about Z? (Uses counter weights/gas struts may maker for zero'ish loading on Z
And of course there's that USB to 4 axis controller box thingy that got me going down this path!
WONGA WARNING!! DO NOT FOLLOW THIS LINK!!
http://www.banggood.com/50KHZ-CNC-4-Axis-Offline-Controller-Breakout-Board-Engraving-Machine-Control-System-Card-p-1021134.html
raynerd:
--- Quote ---am getting tired of twiddling the X- axis on long cuts.
So some form of stepper motor control may be needed for X & Y and maybe Z.
--- End quote ---
Sounds like a power feed may be better suited rather than a full on cnc. That said, my first ever project many years ago, was a stepper motor based power feed. This got me into the basics of steppers, drivers and cnc on one axis, and admittedly, it required very little accuracy so backlash wasn't an issue. It certainly introduced me to cnc ...
Will_D:
Indeed Raynerd,
I am not (yet - or even ever) loooking at full CNC capability.
What I am looking towards in 2 axis control form either manual or very simple g-code (like what is generated by the G-Wizard Simulator Wizards)
If I get the basic mechanicals correct then the full 4 axis g-code will follow.
PK:
Here's how I did it on my X3
I used double shaft motors which let me keep the hand wheels, albeit with them sticking out a bit more.
The mounts were fabricated and then machined true.
The helical couplings are inside the tubes and you can see the access holes for the clamp bolts..
Imagineering:
This is how I did my X & Y Axes.
First Photo is the X Axis. Solid Coupled Motor and twin Thrust Bearings at the other end. This setup relies on the Stepper Bearings for thermal compensation. No issues in 6 Years of operation, 65micron accuracy.
Second Photo is the X Axis from above.
Third Photo is the Y Axis. Solid Coupled Motor with twin Thrust Bearings. This LeadScrew is so short it didn't require a Bearing at the far end.
Fourth Photo is the Y Axis from above.
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