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troubleshooting [2018/08/22 18:26]
90.155.91.76 Tweak the wording of my RPi under-voltage suggestion
troubleshooting [2019/07/20 11:37] (current)
arthur [What is wrong with MKS ?]
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 Finally, make sure you mention all those steps you have taken when asking the community for help, if you don't people will start telling you to do things you have already done. Finally, make sure you mention all those steps you have taken when asking the community for help, if you don't people will start telling you to do things you have already done.
  
-==== 6. Before asking the community for help.+==== 6. Describe/​Take a picture of your setup 
 + 
 +Take a picture of your Smoothieboard,​ a global view of it ( tip : pictures are much sharper and therefore useful, if neither the camera nor the subject are moving. Deposit your camera on a flat surface or fix it in some fasion. If you think pressing the button will make it move, remember you can use a 5-second countdown to take pictures. ) 
 + 
 +Also take pictures of the connectors, wiring, motors, and overall machine. A picture is worth a thousand words. 
 + 
 +When posting on a forum/​social media to get help, attach your config ( it's pastebin link ), but also these pictures, as well as a description of your machine/​setup ( as detailled as you can be patient for, with special time taken for anything that is not commonly done/​unusual ). 
 + 
 +If using a mailing list, do not insert the pictures in the body of your email, but rather attach them to the email. This make things easier for volunteers helping you, and not doing so often leads to ridiculously weird email client layouts ( for example if the picture is much larger than the screen ). 
 + 
 +==== 7. Before asking the community for help.
  
 If you have an Open-Source board like the Smoothieboard,​ a board from Panucatt, or one of the many designed by the community and that support the project, ignore this. If you have an Open-Source board like the Smoothieboard,​ a board from Panucatt, or one of the many designed by the community and that support the project, ignore this.
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 * Is your stepper motor driver too hot to touch? Try aiming a big fan at your board (ideally the bottom of it), the stepper motor drivers might be overheating and shutting down for safety reasons. **Never** put heatsinks on top of your drivers, they are designed to be cooled from the bottom. * Is your stepper motor driver too hot to touch? Try aiming a big fan at your board (ideally the bottom of it), the stepper motor drivers might be overheating and shutting down for safety reasons. **Never** put heatsinks on top of your drivers, they are designed to be cooled from the bottom.
  
 +=== My stepper motor changes direction randomly
 +
 +Your stepper changes rotating direction randomly, however you're sending the same direction command (e.g. X+).
 +
 +Multiple things can cause this:
 +* check ALL your cable connections from board to stepper (possibly with a multimeter, to check if they are not broken)
 +* if using external driver:
 +  * check those cables also
 +  * check the DIR pin levels with a multimeter. Level (0V/3.3V) should change every time you ask for opposite direction rotation from the board.
 +  * if using 5V logic level drives (like TB6600), use a level shifter (3.3V <-> 5V) or change to open-drain in the config
 === Homing does not work === Homing does not work
  
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 This can be caused by several things : This can be caused by several things :
-* Make sure you use short good quality shielded USB cable with ferrite beads on it.+* Make sure you use as short as possible, ​good qualityshielded USB cable with ferrite beads on it ( this is a good example of such a cable :​ https://​goo.gl/MbP5mK )
 * Make sure the Smoothie PSU is plugged into the same outlet as the PC you are connected to, otherwise you can get ground loops. * Make sure the Smoothie PSU is plugged into the same outlet as the PC you are connected to, otherwise you can get ground loops.
 * If your printer is unusually large, add ferrite to everything coming from or going to your board ( motors, endstops, thermistors,​ mosfets, etc ) * If your printer is unusually large, add ferrite to everything coming from or going to your board ( motors, endstops, thermistors,​ mosfets, etc )
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 </​callout>​ </​callout>​
 == SD Card problems == SD Card problems
 +
 +=== My SD card won't work ( LED4 is off at boot )
 +
 +If your SD card will not work, configuration is ignored, and LED4 is off at boot ( and boot takes longer than expected ).
 +
 +The reports of problems like this are rare, but users have reported the following fixes to work : 
 +
 +* Clean up the SD card socket with an alcohol/​IPA-imbibed piece of paper
 +* Clean up the SD card socket with compressed air
  
 === My external SD card ( in my panel ) is not working correctly === My external SD card ( in my panel ) is not working correctly
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 Was: « Somebody refused to help me because my board is a MKS, what's that all about ? » Was: « Somebody refused to help me because my board is a MKS, what's that all about ? »
 +
 +Note : This was written at a time when only MKS was doing this, there are now also SKR boards,​ and even counterfeit Smoothieboards,​ all/most of this is valid for these too.
  
 Smoothie is a community-built Open-Source project. Many people around the world come together to work and share to make the best possible CNC controller. They put likely more than a century of cumulated work into this, and make a lot of sacrifices so that *you* can have the best controller board and firmware possible, with the best documentation and best support. Smoothie is a community-built Open-Source project. Many people around the world come together to work and share to make the best possible CNC controller. They put likely more than a century of cumulated work into this, and make a lot of sacrifices so that *you* can have the best controller board and firmware possible, with the best documentation and best support.
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 {{page>​software}} {{page>​software}}
 +
 +== Hardening
 +
 +Here are some ways you can make your board more resistant to failure
 +
 +=== Adding diodes to stepper motor drivers
 +
 +When manually moving a stepper motor ( or the axis it is tasked with moving ), the coils in the stepper motor can generate electricity. If that electricity is too high ( in terms of voltage ), it can damage the fets inside the stepper motor drivers the stepper motor is plugged into, making it so that the drivers can no longer move the motors ( requiring replacing the driver ).
 +
 +You can fully protect your board against this problem by adding diodes to the stepper motor connector. Instructions to do so acan be found at this link :​ https://​drive.google.com/​file/​d/​1rS3cFeG5eBuuCkOQj2L9rjkRBaJr8npB/​view?​usp=sharing
 +
 +This will be a standard feature for the v2-prime and v2-pro Smoothieboard models, but was kept optional on Smoothieboard v1. It is fairly rare that users damage their drivers this way, but some setups are more at risk than other, in which case hardening might be a good idea ( motor models that generate higher voltages, children likely to move the axes by hand often and fast, etc ... )
 +
 +A suprise tool that will help us later : 
 +
 +* https://​drive.google.com/​file/​d/​17i-90ATSAGQr0AjSGvQnaCrkhGMqMfJ1/​view
 +* https://​www.flickr.com/​photos/​68272764@N05/​sets/​72157676041861517/​
 +* https://​myhub.autodesk360.com/​ue295c58e/​g/​shares/​SH7f1edQT22b515c761e498e6d06e5302746