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This is a broad category of RepStrap that is build from "whatever I had laying around" + "as little purchased as possible".

It's the extremely budget-conscious version, for those with lots of time, and less money.

Essentially, it's a case of:

Build a 3-Axis table

  • Out of whatever you've got lying around. Wood, Steel, etc.

Locate 2nd-hand steppers

  • big old dot-matrix printers are a good source of these. (especially A3 or larger, with perforated paper feeders)
  • some modern printers and scanners also have steppers in them

Stepper Motor Drivers

Build an extruder

sound simple, but isn't for many.

Here are links to pictures of a couple of junkstraps: