The Evolution 4 is a CNC router DIY kit made with a birchwood frame by BobsCNC.

It was released in April 2020 and its somewhat unconventional design is a hallmark of the US-based company, which is run by four old friends (of which one is named Bob, hence BobsCNC).

The company philosophy is to produce “great products” and “great relationships” with its customers (primarily hobbyists, woodworkers, and craft enthusiasts) and employees.

Its latest product, the Evolution 4 is a new and improved edition of the company’s old E4 CNC router, which, after three years, has been retired (though it’s still possible to find refurbished ones on the BobsCNC website for about $800).

Though the new router is a bit pricier than its older counterpart (it sells for about $1,100) it accounts for a host of changes made after taking account of customer feedback.

So, are the changes worth it? Read on as we review this router’s specs.

BobsCNC E4: Review the Specs

Features

Solid customer service

BobsCNC has built up a reputation for offering quality customer service. If you’re a pretty handy person already this may not matter much to you, but if you’re just getting into CNC routers having a reliable way to get in touch with the manufacture should you run into any issues is worth considering.

Generous Cutting Area

The Evolution 4 gives you pretty generous 610 x 610 x 85 mm to work with. This opens up the range of what you can do with the machine.

Documentation

This router comes with an in-depth assembly manual to help you put it together (it is a kit, after all).

The old E4 (Source: BobsCNC)

Upgrades from the old E4

BobsCNC made a host of changes to the old E4 to build the Evolution 4. The company replaced the threaded rod on the Z-axis with an Acme rod (which is secured with a bearing and locking collar to reduce Z-axis wobble) to speed up Z-travel so jobs can be completed more quickly. There’s also no need to lubricate the Z-drive thanks to a Delrin Acme nut.

Further upgrades are adjustable eccentric spacers to keep the bearings tight against the rails, a torsion box gantry to reduce linear and torsional deflection for a faster cutting speed, and an integrated belt-tensioner to simplify belt-tightening.

BobsCNC created router mounts for quieter, speed-variable routers and you have the option of a DeWalt DW611 or a Makita RT0701C. The self-squaring gantry is now standard and wire routing has been improved to protect the wires from damage and electrical interference.

Lastly, there’s a one-piece spoilboard with inserts to make assembly easier, but you also have the option to design your own if you want to save some money.

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BobsCNC Evolution 4 Commissions Earned
BobsCNC Evolution 4
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BobsCNC E4: Review the Specs

Tech Specs

  • Cutting area: 610 x 610 x 85 mm
  • Machine footprint: 838 x 994 x 530 mm
  • Weight: 48 lbs
  • Accuracy: 0.002 to 0.004 inches
  • Assembly: DIY kit
  • Frame: Laser cut 6 mm baltic birch with rigid box and beam gantry
  • Router spindle: DeWalt 611 (16k – 27k RPM) or Makita RT0701C (10k – 30k RPM)
  • Processor firmware: GRBL v. 1.1
  • Controller: Uno controller
  • Recommended G-code sender: UGS Platform
  • X and Y-axis: GT2 x 6 mm belt drive
  • Z-axis: Tr8 ACME rod with Delrin nut
  • Rail system: Supported rails, 5/16″ stress-proof steel
  • Power supply AC: 12 VDC 8 amps
  • Input: 110 v
  • Drive motors: NEMA 17 stepper motors
  • Holding torque: Nm 0.53
  • Home switches: Self-squaring gantry
  • Servo resolution X- and Y-axis: 0.0125 mm
  • Servo resolution Z-axis: 0.0025 mm

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BobsCNC Evolution 4 Commissions Earned
BobsCNC Evolution 4
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BobsCNC E4: Review the Specs

Where to Buy

Here’s where you can get your own Evolution 4:

BobsCNC Evolution 4
Commissions Earned Check price at

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License: The text of "BobsCNC Evolution 4 CNC Router Kit: Review the Specs" by All3DP is licensed under a Creative Commons Attribution 4.0 International License.

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