FANUC welding robots: ARC Mate, CRX, and what buyers actually compare

FANUC is unusual among the large industrial robot manufacturers in that it sells two genuinely distinct welding paths under one badge: a traditional, dedicated arc welding line in the ARC Mate series, and a full collaborative welding option built on its CRX cobot arms. Most buyers researching “FANUC welding robots” are trying to work out which of the two actually fits their shop, not just comparing spec sheets within one product line.

The ARC Mate Series: FANUC’s Traditional Welding Line

The ARC Mate 100iD is FANUC’s most commonly quoted dedicated arc welding robot, published at 12 kilograms payload, 1,441 millimetres reach and plus or minus 0.02 millimetres repeatability, according to FANUC’s own American product page. It is designed around a slim, hollow wrist body that keeps torch cabling and hose bundles tucked close to the arm rather than looped externally, which matters when the arm has to work inside a narrow jig or fixture.

For bigger parts, FANUC’s ARC Mate 120iD extends payload to 25 kilograms and reach to 1,831 millimetres, with the same plus or minus 0.02 millimetres repeatability figure and the same slim-wrist design philosophy scaled up. FANUC still sells and supports the older ARC Mate 100iC family (roughly 10 kilograms payload, 1,420 millimetres reach) for buyers standardising on legacy cells or sourcing spares for an existing installation, though the 100iD and 120iD are the current generation most integrators will quote for a new cell.

FANUC’s dedicated welding software, ArcTool, runs on top of the standard robot controller and adds functions specific to arc welding: programmed weave patterns for wider joints, multi-pass sequencing for thick material, and touch sensing that locates the actual joint position before the arc fires, correcting for small variations between parts. Thru-Arc Seam Tracking, a real-time correction feature using the welding current itself as a sensor, is part of the same ArcTool package. For shops with parts that vary enough in position to need vision-based part finding rather than touch sensing alone, ArcTool integrates with FANUC’s iRVision system.

On the welding power source side, FANUC’s own press material documents integration with Lincoln Electric equipment, describing Power Wave and STT power sources as a plug and play pairing with ArcTool. A separate integrator case study references an ARC Mate 50iD cell running Miller equipment. A Fronius integration was not confirmed in the sources checked for this guide, so if your shop is standardised on Fronius, verify directly with FANUC or your integrator before assuming the connection exists.

FANUC’s CRX Cobot Line: A Real Welding Option, Not a Side Product

Unlike some competitors that treat their cobot arm as a general-purpose product occasionally repurposed for welding, FANUC maintains a dedicated welding applications page for its CRX line, and the company introduced a collaborative arc welding product publicly at FABTECH in 2019, which is a strong signal this is a deliberate, ongoing part of FANUC’s welding strategy rather than a marketing afterthought.

The CRX range spans several payload classes, all rated with a repeatability figure of plus or minus 0.02 millimetres on the welding-specific configuration FANUC publishes:

• CRX-3iA: 3 kilograms payload, 692 millimetres reach
• CRX-5iA: 5 kilograms payload, 994 millimetres reach
• CRX-10iA: 10 kilograms payload, 1,249 millimetres reach
• CRX-10iA/L: 10 kilograms payload, 1,418 millimetres reach
• CRX-20iA/L: 20 kilograms payload, 1,418 millimetres reach
• CRX-30iA: 30 kilograms payload, 1,756 millimetres reach

FANUC’s CRX welding configuration includes torch angle control and touch sensing carried over from the ARC Mate lineage, along with Thru-Arc Seam Tracking on the welding-specific package. Supported processes listed by FANUC include MIG (GMAW), TIG (GTAW), plasma and laser welding, which is a wider process list than most cobot competitors publish for their own welding packages.

Traditional ARC Mate or CRX Cobot: What Actually Changes the Decision

The honest answer buyers get from integrators is that payload and reach rarely decide this choice on their own, since the two product lines overlap in capability at the lower end. What actually moves the decision is guarding and floor space (a CRX cell can run with lighter guarding under ISO/TS 15066, while an ARC Mate needs standard fencing), production volume and cycle time (ARC Mate models run faster without collaborative speed limits, which matters at high single-part volume), and how often the part mix changes (a CRX cell is generally faster to reprogram and redeploy for a new job).

See welding cobot vs industrial robot for the fuller category-level comparison, and welding cobot models for how FANUC’s ARC Mate and CRX lines stack up against KUKA, ABB and cobot-focused newer entrants.

What a FANUC Welding Cell Actually Costs

FANUC does not publish arm pricing and sells exclusively through its integrator network, so every real number in this space is an estimate rather than a manufacturer figure. General industry content puts FANUC’s full product range, not welding-specific, anywhere from around 10,000 dollars for the smallest arms to well over 400,000 dollars for heavy-payload classes, which spans FANUC’s entire catalogue rather than the ARC Mate or CRX welding lines specifically.

A more useful data point for planning purposes comes from the used equipment market, where secondary listings for ARC Mate units, sourced through resellers rather than FANUC directly, commonly run somewhere in the 8,000 to 20,000 dollar range depending on model, condition and controller generation. That figure is resale pricing for a bare arm, not a new-unit price and not a deployed, integrated cell cost, which typically runs several times higher once fixturing, guarding, the welding power source and commissioning are added, as with any arc welding cell regardless of brand.