ultimaker2 (UM2) original 3D printing motherboard upgraded silent driver extended version

# The solution has been verified
#### (board making + welding + machine installation)
![IMG20230612205336.jpg] ## The silent driver extension originally used for UM2 motherboard
supports tmc2208, tmc2209, tmc2225 and other silent drivers. Note: the steps of different drivers The subdivision jumpers are different (MS1 and MS2 correspond to jumper modes).

## Connect the flying wire to the motherboard
through a 16pin horn socket and solder the corresponding test point of the um2 motherboard (see the PDF file in the attachment for details).

### It can also be used as a driver board for a 6-stepper motor

. ### It can also be used as an expansion board for a closed-loop stepper motor
. The 6PIN interface corresponding to each axis on the above board can be used for the plug of the closed-loop stepper motor. You can search on Taobao for details.

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# Existing problem
## If the printing temperature rises for a long time, it will cause loss of steps
### It is necessary to add a fan to dissipate heat, and the silent driver has a heating problem
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Note: The original file was drawn by AD (in the attachment)

![ZJ%YFAD_SLWEB $~5W3P5E@B.png]