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Updated TMC2xxx troubleshooting and mainboard repair instructions (markdown)

Oliver Köster
2022-02-08 16:06:06 +01:00
parent 200e015836
commit 849911980c
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TMC2xxx-troubleshooting-and-mainboard-repair-instructions.md

@@ -1,4 +1,4 @@
# Troubleshoot # Troubleshooting
> ## _**I accidentally installed my drivers the wrong way round and when I switched on the mainboard released magic smoke**_ > ## _**I accidentally installed my drivers the wrong way round and when I switched on the mainboard released magic smoke**_
@@ -8,19 +8,19 @@ When that happens, you unfortunately have to buy new drivers because at least on
The following picture shows an intact board with the diode still intact: The following picture shows an intact board with the diode still intact:
[[https://raw.githubusercontent.com/knutwurst/Marlin-2-0-x-Anycubic-i3-MEGA-S/master/images/diode_closeup.jpg | width = 800px]] [[/images/diode_closeup.jpg | width = 800px]]
When this burns down, however, a small flame is created that comes out of the housing and melts a hole in it: When this burns down, however, a small flame is created that comes out of the housing and melts a hole in it:
[[https://raw.githubusercontent.com/knutwurst/Marlin-2-0-x-Anycubic-i3-MEGA-S/master/images/burnt_diode_closeup.jpg | width = 800px]] [[/images/burnt_diode_closeup.jpg | width = 800px]]
So we solder out the old defective diode, take a new one out of the bag, cut off the legs so that they are not too long and solder them to the board. So we solder out the old defective diode, take a new one out of the bag, cut off the legs so that they are not too long and solder them to the board.
[[https://raw.githubusercontent.com/knutwurst/Marlin-2-0-x-Anycubic-i3-MEGA-S/master/images/1N4733.jpg | width = 800px]] [[/images/1N4733.jpg | width = 800px]]
Please pay attention to the polarity. The black bar must point to the left, as shown in the photo. Please pay attention to the polarity. The black bar must point to the left, as shown in the photo.
[[https://raw.githubusercontent.com/knutwurst/Marlin-2-0-x-Anycubic-i3-MEGA-S/master/images/new_diode_closeup.jpg | width = 800px]] [[/images/new_diode_closeup.jpg | width = 800px]]
That's it The board should now run again. If not, a fuse could be defective (above the diode), but that is rare when installing the driver. That's it The board should now run again. If not, a fuse could be defective (above the diode), but that is rare when installing the driver.
@@ -36,17 +36,17 @@ The only way to test this is to build it in. However, with three simple tests yo
A sure sign of a defective driver is a burn hole or discoloration of the chip, similar to a burned Zener diode. Everything that does not look 100% clean can be sorted out. A sure sign of a defective driver is a burn hole or discoloration of the chip, similar to a burned Zener diode. Everything that does not look 100% clean can be sorted out.
[[https://raw.githubusercontent.com/knutwurst/Marlin-2-0-x-Anycubic-i3-MEGA-S/master/images/burnt_stepper.jpg | width = 800px]] [[/images/burnt_stepper.jpg | width = 800px]]
**2. Measure the resistance of the motor power supply** **2. Measure the resistance of the motor power supply**
To make sure that we don't have a short circuit in the driver that blows our fuses or, in the worst case, the whole board, we simply check the resistance between **GND** and **VMOT** (the designations can change, but the pins are always the same). Here the resistance should be very high (in the megohm range) and not in the direction of 0 (short circuit). It also always makes sense to compare ALL drivers. If the values ​​are all identical, it looks good ... if one deviates, it will be defective. To make sure that we don't have a short circuit in the driver that blows our fuses or, in the worst case, the whole board, we simply check the resistance between **GND** and **VMOT** (the designations can change, but the pins are always the same). Here the resistance should be very high (in the megohm range) and not in the direction of 0 (short circuit). It also always makes sense to compare ALL drivers. If the values ​​are all identical, it looks good ... if one deviates, it will be defective.
[[https://raw.githubusercontent.com/knutwurst/Marlin-2-0-x-Anycubic-i3-MEGA-S/master/images/stepper_vmot_gnd.jpg | width = 800px]] [[/images/stepper_vmot_gnd.jpg | width = 800px]]
**3. Measure the resistance of the driver power supply** **3. Measure the resistance of the driver power supply**
The same game as with VMOT, only this time on the VDD pin. The value should be measurable in the kilo-ohm range. If 0 Ohm or "infinite" is displayed here, the driver is for the barrel. The same game as with VMOT, only this time on the VDD pin. The value should be measurable in the kilo-ohm range. If 0 Ohm or "infinite" is displayed here, the driver is for the barrel.
[[https://raw.githubusercontent.com/knutwurst/Marlin-2-0-x-Anycubic-i3-MEGA-S/master/images/stepper_vdd_gnd.jpg | width = 800px]] [[/images/stepper_vdd_gnd.jpg | width = 800px]]