![]() ![]() The Z-axis of the avid uses a precision ball screw drive which is much more accurate than Acme drives. Racking can cause the X-axis to flex and produce inaccurate cutting. This helps avoid an issue called racking which's common in 4x8 CNC gantry's, due to the long Y-axis length. The avid PRO4896 runs its Y-axis on dual drives, meaning each Y-axis is run by a separate NEMA23/34 stepper motor. The frame of the CNC is high-quality extruded aluminum, which stays rigid without flexing even when run at the highest speeds.Īlthough some machinists insist on welded steel as the frame material, as some of the models that come in the latter part of this review, the frame on the Avid CNC is strong enough to produce accurate cuts for even medium-grade production work. While a belt system offers good speed it is not accurate enough for 4x8 CNCs, and this is where a rack and pinion system wins. The speed is a major challenge with full sheet CNC routers, due to the large travel. ![]() The Y-axis is 8 feet (96"), the best choice for the drive of a 4x8 CNC is a rack and pinion system, and the avid uses that. Unlike 4x4 CNCs and other smaller CNCs, 4x8 CNCs are complicated due to the long travel distance that's involved. The brand and the product are highly reputed in the CNC community due to the quality of their machines.Īll Avid users I know swear by their Avid, and these are people who've been using the same machine for at least 3 years. The Avid CNC-CRP4896 is the best and only choice in my opinion if you are looking to get a high quality 4x8 CNC router under $10,000. ![]()
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