3x4 CNC Router: The Rectangular Format for Sign and Panel Work
Not every project is square. A sign shop running full-size exterior blanks works in a rectangle: 30 to 36 inches wide, 40 to 48 inches tall. A 3x4 machine matches that workflow exactly without the excess footprint of a 4x4. The savings in bench space and machine cost are real for shops whose work runs consistently in this proportional range.
A 3x4 CNC router has a cutting area of approximately 3 feet by 4 feet, or 36 by 48 inches. This rectangular format provides significantly more Y depth than a 3x3 while keeping the X gantry span at a manageable width.
The direct answer: Avid CNC’s configurable PRO series is the most accessible commercial path to a 3x4 work area. Onefinity offers extended-format Journeyman configurations near this size. At 4 feet of Y travel, ball screws and profile linear rails are required for consistent quality; lead screws spanning 4 feet flex under load.
What a 3x4 Work Area Handles
- Full-size exterior sign blanks (34 by 46 inch capacity)
- Chair back and seat panels in a single setup
- Paired cabinet door panels nested together
- Guitar/bass body templates with multiple copies nested
- Long architectural molding profile runs
- Decorative furniture headboard sections
Drive Requirements at 4 Feet of Y
Ball screws on X and Y. Profile linear rails on all axes. NEMA 23 motors minimum. Lead screws spanning 4 feet flex under mid-span cutting loads in ways that become visible in long straight cuts.
Closest Commercial Options
Avid CNC PRO3648: Rack-and-pinion X/Y, ball screw Z, NEMA 23/34 options, CNC12 controller. The most direct commercial path to 3x4.
Onefinity extended formats: Onefinity’s Journeyman extended configurations approach this work area. Hollow-shaft guides, ball screws.
Verdict
The 3x4 format suits sign shops and furniture operations whose work runs longer in one dimension than a 3x3 allows. Avid CNC PRO is the most direct commercial option. Ball screws and rails are the correct spec at this size.
FAQ
Is there a production machine at exactly 3x4 feet? Avid CNC PRO series can be configured at this size.
What’s the difference between 3x3 and 3x4? 12 inches of additional Y depth. Matters for full exterior sign blanks and chair back panels.
References
- Avid CNC PRO: avidcnc.com