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NEW PART DAY: SILENT STEPPER MOTORS


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Posted · NEW PART DAY: SILENT STEPPER MOTORS

Sorry, didn't see your reply earlier o.O

I'm replacing the UMO electronics board and the pololu steppers. The Arduino Mega2560 is re-used. I'm also replacing the connectors, but the replacements are very easy to use (just push the wires into the housing, without stripping the insulation, crimping or soldering).

The reason is that the UMO electronics just suck - and the pololu compatible TMC2100 drivers don't give access to the various config options.

The UMO power supply brick can be reused or replaced - depends on whether or not you want to have a heated bed or not.

Everything else stays the same, function-wise.

The (empty) boards should arrive tomorrow, or on monday. I'm busy with an e-nable project at the moment but will put the prototype together asap.

/almost forgot:

The TMC2100's are not yet available (march 27th according to digi-key) which means the drivers will have to wait a few more days anyways.

 

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    Posted · NEW PART DAY: SILENT STEPPER MOTORS

    No dual extruders for now - only makes the board unnecessarily big. I didn't want to have to mess with Marlin at all, that's why I didn't change any features. My shield uses the exact same configuration as the UMO electronics, so you can use the Ultimaker standard firmware.

     

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    Posted · NEW PART DAY: SILENT STEPPER MOTORS

    And the best thing is, it is so easy ..... You just have to desolder the CFG2 resistor from the SilentSticks, Lift the Jumper from MS1 and replace the driver ....at least this Works for all Drivers except the z-Stage .... The Z-Stage uses 1/8 Steps ... this is not supported from the SilentStepSticks ..

    The Last thing you have to do is to xxchange the Motor cables .... there are two twisted pairs ..... Upper and Lower ... Just remove the pairs from the connector and Exchange the pairs ...

    Now everything should work ... Just more Silent ;)

     

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    Posted · NEW PART DAY: SILENT STEPPER MOTORS

    And the best thing is, it is so easy ..... You just have to desolder the CFG2 resistor from the SilentSticks, Lift the Jumper from MS1 and replace the driver ....at least this Works for all Drivers except the z-Stage .... The Z-Stage uses 1/8 Steps ... this is not supported from the SilentStepSticks ..

    The Last thing you have to do is to xxchange the Motor cables .... there are two twisted pairs ..... Upper and Lower ... Just remove the pairs from the connector and Exchange the pairs ...

    Now everything should work ... Just more Silent ;)

     

    This seems like a different approach than what was previously described in this thread (remove two pins from the stepsticks and add a jumper wire)... Care to share a photo or two of your sticks and the motor cables?

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    Posted · NEW PART DAY: SILENT STEPPER MOTORS

    .at least this Works for all Drivers except the z-Stage .... The Z-Stage uses 1/8 Steps ... this is not supported from the SilentStepSticks ..

     

     

    You can run the z stage with higher multistepping. You just have to adjust the steps per mm settings (doesn't even require a new firmware).

     

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    Posted · NEW PART DAY: SILENT STEPPER MOTORS

    Maybe just a short update without pictures :

    https://github.com/watterott/SilentStepStick

    Here you can find the schematics with guide ... i think there is only one mode useful and this is a

    16 usteps to 256 usteps Interpolation in the spreadcycle mode.

    This can be reached through CFG2 open ( desolder the resistor ) and CFG1 set to GND ( Low ) ...

    The original steppers are configured to ( High, High, High ) for all motors for 1/16 Steps except the Z-Stage, the Z-Stage is configured to ( High, High, Low ) for 1/8 usteps ......

    That means if you remove the Jumper from MS1 .. MS1 and therefore CFG1 is set to low ....

    Regarding the motor cable :

    If you look at the cable you can see the following color ordering :

    Blue, Red, Green, Black ....

    You just have to change them to

    Green, Black, Blue, red ...

    And by the way ... i set the voltage reference to 1.25 Volt which should lead to about 0.88 A .... first i set it to 1.2 A ... but the steppers were running with about 70° C ... now they run with about 50° C .....

    Currently i print a big, red elephant for my daughter ... it is running already 8 hours and if everything wents fine this will be a 30 h testprint .....

    I think after that i will know if everything is stable ;)

     

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    Posted · NEW PART DAY: SILENT STEPPER MOTORS

    What did that cost you?

     

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    Posted · NEW PART DAY: SILENT STEPPER MOTORS

    Hi Zumfab,

    Each stepper driver costs 10 € ....

    The Most Important ones are x and y ....

    I exchanged the extruder too, but this one is still quite loud during retraction....

    So ... You reduce Noise a lot if you spend 20 € ....

     

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    Posted · NEW PART DAY: SILENT STEPPER MOTORS

    So .. my print failed ... but not due to the StepperDrivers .... My electronics cable was not fixed to the hot end .... so the Thermocouple cable got lifted .... wish Marlin was implemented with a PauseOnError Logic, and not with a StopOnError Logic ;)

     

    Here is the promised picture ... in the upper left corner is still the pololu driver for the Z-Stage, all other stepper drivers are SilentStepSticks .....

     

    The CFG Resistor is on the bottom side of the drivers but you can see the cable connection and the jumpers

     

    Enjoy ;)

     

     

     

    Ultimaker

     

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    Posted · NEW PART DAY: SILENT STEPPER MOTORS

    Hi Zumfab,

    Each stepper driver costs 10 € ....

    The Most Important ones are x and y ....

    I exchanged the extruder too, but this one is still quite loud during retraction....

    So ... You reduce Noise a lot if you spend 20 € ....

     

    Yes and no. Yes, x and y axis are important but (no) don't underestimate the extruder motor(s). Just unhook it during a print and you will hear the difference.

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    Posted · NEW PART DAY: SILENT STEPPER MOTORS

    Yes and no. Yes, x and y axis are important but (no) don't underestimate the extruder motor(s). Just unhook it during a print and you will hear the difference.

     

    Just decoupling the feeder from the chassis makes a huge difference. IME, the silentstep stick did not make a huge difference in the sound of retractions, but decoupling the feeder from the chassis did.

     

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    Posted · NEW PART DAY: SILENT STEPPER MOTORS

    By the way, the cfg pins recognise three states, not just one! "Open" is a state, too. If you want to set one of the cfg pins to GND, then you have to tie it to GND.

    Watterott was really fast to restock on the silent stepsticks... The chips only just released last week... I got mine last thursday, no chance to put my boards together yet. Maybe today or tomorrow...

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    Posted · NEW PART DAY: SILENT STEPPER MOTORS

    I didn't notice this when I first converted to the silent drivers.

    MS1 on all driver sockets is grounded using a 100K resistor. When there is no jumper installed this pin is GND. When there is a jumper, it is at 5V. This is contrary to the other two, MS2 and MS3. When they don't have a jumper, they are open. With a jumper they are 5V.

    So I think it's much simpliler than we have been on about. Solder in the full header and remove all jumpers and stab them in. This should result in CFG1 being grounded and CFG2 being open.

    Based on the schematic, CFG3 is not connected unless you bridge the solder pads.

     

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    Posted · NEW PART DAY: SILENT STEPPER MOTORS

    That clip about the improvements is amazing. I needed to watch it again, because I couldn't figure out how much of a difference it made with a printer running here :D

     

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    Posted · NEW PART DAY: SILENT STEPPER MOTORS

    I have just come across this topic and find it very interesting although most of it might as well be in another language :)

    It seems everyone here is implementing this on there UM0's but can this be installed onto a UM2 with any benefit?

    I don't know a lot about electronics but if it can be done it could be a fun project.

     

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    Posted · NEW PART DAY: SILENT STEPPER MOTORS

    With sufficient effort, it could be done on a UM2, but it would be greatly complicated by the fact that the UM2 does not have sockets for swapping out the stepper motor drivers.

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    Posted · NEW PART DAY: SILENT STEPPER MOTORS

    With sufficient effort, it could be done on a UM2, but it would be greatly complicated by the fact that the UM2 does not have sockets for swapping out the stepper motor drivers.

     

    That always seemed illogical to me. Burnt out stepper drivers are not a rarity, though maybe the UM2 has other protections in place I do not know abouit.

     

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    Posted · NEW PART DAY: SILENT STEPPER MOTORS

    Oh Well, it would have been a cool addition. to bad you can't just solder on a filter or something. Thanks Anyways

     

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    Posted · NEW PART DAY: SILENT STEPPER MOTORS

    That always seemed illogical to me. Burnt out stepper drivers are not a rarity, though maybe the UM2 has other protections in place I do not know abouit.

     

    It helps that the UM2 board has digital current control and that the larger ground plane provides better cooling for the drivers.

     

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    Posted · NEW PART DAY: SILENT STEPPER MOTORS

    It helps that the UM2 board has digital current control and that the larger ground plane provides better cooling for the drivers.

     

    True - the Pololu design ist just bad. That's why the drivers burn in the first place. There is also the possibility of an ESD event damaging the drivers. With simple measures this can be prevented, too.

    I opted for a modular design with separate stepper drivers because dividing up the PCBs makes them cheaper. One large 4-layer PCB is EXPENSIVE :-/

     

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    Posted · NEW PART DAY: SILENT STEPPER MOTORS

    Just finished installing a RUMBA board in my (now very hacked) UMO, and put in 4 SilentStepSticks in the same go...

    Noise is so much lower than anything I have seen before (I have tried DRV8825 sticks with double steps/mm. as well)

    I filmed a homing sequence with my iPad, but the video is too large to upload here on the forum, and I cant be bothered compressing it right now, so here is a dropbox link instead:

    https://www.dropbox.com/s/gd2trsmvwwszaka/2015-04-12%2016.42.44.mov?dl=0

    One thing:

    When finished homing and the steppers are idle, they make a slight whining sound, like they are still holding current and about to do a step or something... It goes away if I select the "disable steppers" option on my Smart Controller...

    Also if you turn off the printer while they are whining you can hear sort of a "phew" sound...

    Anyone knows what this means and how to get rid of it? Adjust stepstick current maybe?

    (All 4 stepsticks currently measure around 1.2V/1.68A)

     

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