TMC2209 - A Part Number You Are Going To Hear More About In 3D ...

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Trinamic-TMC2209-stepper-motor-driver-3d-printer

In many printers, the stepper drivers can be changed as they are fitted as ‘Pololu’ carrier boards or  ‘stepsticks‘ – small pcbs that plug into the main printer pcb through two rows of header pins. Drive current is set by a small pot on the stepstick, and the driver more is configured by three jumpers on the associated pcb, or, more rarely, a serial bus of some sort. Alterations to the printer software are sometimes required, which is quite straight forward if the printer runs ‘Marlin’.

Trinamic has made a name for itself as a supplier of driver chips that can cut the noise output of 3D printers – which can be intrusive, especially during over-night prints, and largely comes from: fans, stepper motors and moving mechanical parts.

The relevant Trinamic technology is a mode called StealthChop, which smooths the way that stepper motors turn, leading to near-silent operation. Cutting motor-induced vibration has the knock-on effect of injecting far less vibration into the printer chassis, further reducing noise – printers go from being dominated by motor noise to being quiet except for fan noise.

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