MPCNC Primo vs LowRider CNC 3 — V1 Engineering's Two Different Philosophies

The Design Difference: Fixed Bed vs. Riding Router

In English: MPCNC is a "table machine"—you mount work on a table and the router hangs over it. LowRider is a "riding machine"—you lay a sheet flat and the router rides on top of it.

Work Area & Material Volume

This is the primary decision point.

MPCNC Primo:

• Typical work area: 24×24" (600×600mm)
• Maximum practical: 36×36" (900×900mm) before rigidity becomes problematic
• Use case: brackets, small panels, precision parts, anything under 24"

LowRider CNC 3:

• Work area: up to 4×8 feet (1220×2440mm)
• Practical size: scales with your space
• Use case: full sheets, cabinet sides, large flat panels, signs

The hard truth: if you need to route a 4×8 sheet of plywood, MPCNC doesn't exist for you. LowRider is the only option. If you only route things under 24", MPCNC is purpose-built and cheaper.

Cost Comparison

MPCNC Primo Complete Build:

• Frame kit (V1 Engineering): $200–250
• Extra conduit & hardware: $50–100
• Spindle (Makita RT0701C): $95–120
• Controller & PSU: $80–120
• Bits, misc: $30
• Total: $455–620 (typically ~$550)

LowRider CNC 3 (750×750mm):

• Frame kit (V1 Engineering): $350–450
• Extra hardware: $50–100
• Spindle (Makita RT0701C): $95–120
• Controller & PSU: $80–120
• Bits, misc: $30
• Total: $605–820 (typically ~$700)

LowRider CNC 3 (1000×1000mm):

• Frame kit: $400–500
• Hardware: $75–125
• Spindle: $95–120
• Controller & PSU: $80–120
• Bits, misc: $30
• Total: $680–895 (typically ~$800)

Cost difference: $100–300 depending on LowRider size. LowRider costs more, but you're getting dramatically more work area for the investment.

Cost per square inch of work area:

• MPCNC (600×600): $550 ÷ 360 sq in = $1.53 per sq inch
• LowRider (750×750): $700 ÷ 5,625 sq in = $0.12 per sq inch
• LowRider (1000×1000): $800 ÷ 10,000 sq in = $0.08 per sq inch

If work area matters, LowRider is dramatically cheaper per square inch.

Rigidity & Precision

Both use the same aluminum extrusion and V-wheel systems. Both achieve:

• Repeatability: ±0.5–1mm with proper tuning
• Precision ceiling: ±0.5mm achievable with care
• Surface finish: clean on wood, good on acrylic

There's no meaningful difference in rigidity when compared at the same scale. MPCNC at 600×600 and LowRider at 600×600 perform identically.

Where they differ: larger machines flex more. A 4×8 LowRider has more XY flex than a 600×600 MPCNC simply because the cantilevered distance is greater. This is physics, not design failure. Most builders accept this tradeoff.

Z-Axis & 3D Capability

MPCNC wins decisively here.

MPCNC:

• Z travel: typically 80–120mm
• Z rigidity: good (ballscrew or leadscrew, depends on upgrade)
• 3D carving: fully capable

LowRider:

• Z travel: typically 20–50mm depending on build
• Z rigidity: good but shorter travel
• 3D carving: limited (you can do it, but low Z clearance is restrictive)

Why: LowRider rides on the work, so the spindle starts only inches above the surface. You can't do aggressive 3D work when you're constrained to 30mm Z travel.

Reality: if 3D carving matters, MPCNC or a fixed-frame machine is better.

Setup & Workflow Difference

MPCNC Setup:

• Mount work on a table inside the frame
• Set work home/zero
• Run job

LowRider Setup:

• Lay plywood on a flat surface
• Position LowRider on top of the work
• Set corners or registration points
• Run job

LowRider workflow is actually simpler for large flat panels (no clamping inside a frame, work sits flat). For small precision work, MPCNC is more secure (work is clamped inside frame).

Shared Ecosystem (This Matters)

Both MPCNC and LowRider:

• Use GRBL firmware (same controller, same G-code)
• Use Makita RT0701C as standard spindle
• Share hardware sourcing (V1 Engineering supplies both)
• Have overlapping community (V1 Engineering forums)
• Have compatible controllers and electronics

This means: if you start with MPCNC, you understand LowRider. If you build MPCNC and later need to handle 4×8 sheets, the LowRider learning curve is shallow—same firmware, same workflow philosophy, just bigger.

Material Capability

Both handle the same materials equally:

• Wood: excellent
• Acrylic: excellent
• MDF: excellent
• Plywood: good (tearout control needed)
• Aluminum: barely (not recommended on either)

No difference here. Material suitability is determined by spindle power and feed rate tuning, not machine design.

When MPCNC Primo Wins

• Work area under 24×24" is sufficient: purpose-built, optimal cost
• 3D carving is 50%+ of your work: better Z travel and stiffness
• Precision under 0.5mm is critical: more Z rigidity
• Budget is under $600: MPCNC is cheaper
• Setup complexity bothers you: MPCNC is simpler (work clamped in frame)
• You're new to CNC and want to learn: smaller, less intimidating

When LowRider CNC 3 Wins

• You need to route full sheets or large panels: non-negotiable requirement
• Cabinet making or furniture is your primary work: purpose-built for this
• Work area requirements exceed 24×24": LowRider scales easily
• Your shop has floor space but limited wall space: LowRider sits on the work
• Material volume matters more than precision: cutting batches of panels
• Cost per square inch is important: LowRider is dramatically cheaper at scale

The Decision Criteria

Upgrade Path Reality

MPCNC:

• Can upgrade to ballscrews (~$150–200)
• Can swap to linear rails (~$200–300)
• Cannot practically scale much larger (work area ceiling ~36×36")
• If you outgrow it, you build something else

LowRider:

• Can upgrade to ballscrews (~$200–400)
• Can scale larger (add sheet size, extend frame)
• Forward-compatible: same platform at all sizes
• If you need more, you extend it

Bottom line: MPCNC is a fixed destination. LowRider is scalable.

Verdict

MPCNC Primo is the best small-format CNC for the price. If you're routing things under 24 inches and want to learn CNC affordably, it's unbeatable. The community is large, the docs are excellent, and it's simple enough to troubleshoot.

LowRider CNC 3 is the best full-sheet CNC for the price. If you're routing cabinet parts, panels, or large flat work, it's purpose-built. Same community, same firmware, same accessibility—just different footprint.

Don't pick MPCNC expecting to do LowRider-sized work. Don't pick LowRider expecting MPCNC precision and 3D capability. Pick based on what you actually cut, not what you might someday cut.

If you have both needs (small precision + large sheets), that's two machines. Many serious shops have both. V1 Engineering made them complementary on purpose.

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Related Articles

• MPCNC Primo Complete Build Guide
• LowRider CNC 3 Build & Setup Guide
• MPCNC vs PrintNC: Accessibility vs Rigidity
• V1 Engineering CNC Ecosystem: Firmware & Community