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Hey everyone!

Stephan Watterott, the CEO of Watterott electronic (producer of the SilentStepStick drivers) told me last week that a new stepper driver will be released within the next month. The driver fits the Pololu A4988 pinout and comes with an TMC2130 - which supports the stallGuard2 functions!

I can't wait to try that feature ;)

EDIT 2016-03-08:

Here we go!

IMG_20160308_140441.thumb.jpg.790fd9d7c14bf80abcbd1d7fb517f82f.jpg

EDIT 2016-03-08:

At first I tried the "standalone"-configuration, to do so you have to solder a short on the little solder-jumper

(SPI_MODE-Pin to GND). Works similar to the TMC2100 SSS:

IMG_20160308_162735.thumb.jpg.2e2ac44fe756832cf522085ef3c41f30.jpg

IMG_20160308_163231.thumb.jpg.3a191450180642b67807c845ce22a62d.jpg

You don't need a Microcontroller this way, you can set the microsteps via the Levels on the cfg Pins, just as at the older SSS.

IMG_20160308_162916.thumb.jpg.fbf03c9a3e66ad0f8ede6c85d858633a.jpg

The downside is, you cannot read out or set the registers of the driver (e.g. for the stallguard2 Feature)

EDIT 2016-03-10:

Today I tried the StallGuard2. You can see a very short Video here:

 

EDIT

 

IMG_20160308_140441.thumb.jpg.790fd9d7c14bf80abcbd1d7fb517f82f.jpg

IMG_20160308_162735.thumb.jpg.2e2ac44fe756832cf522085ef3c41f30.jpg

IMG_20160308_163231.thumb.jpg.3a191450180642b67807c845ce22a62d.jpg

IMG_20160308_162916.thumb.jpg.fbf03c9a3e66ad0f8ede6c85d858633a.jpg

Edited by Guest
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Those drivers are crazy, unbelievable - I mean... there is a register for nearly everything. And, even if you don't need it, those drivers support up to 256 native (real!) microsteps per full step and also interpolation to 256. everything works easy with SPI.

Only "downside" is that you need a Microcontroller to set it up and use the extra functions - if you don't use the standalone configuration.

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Looks like they still work - I don't know why they didn't yesterday, but today I tried to control them with an BusPirate (a little device for the PC) and they did what I told them :D

There are so f*** much settings, I feel a bit lost... but I stumbled across one which is called "shaft", guess what it is: "invert axis" - yay!!!

The driver is running on my Ultimaker now. It's still uncomfortable because I have to set the driver up everytime I power up the machine. I will play around with all those settings now. After that, we should think about better solution (maybe an external microcontroller, which would be easy, or - if there are enough pins left, we could also use the already existing).

cheers and good night!

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The TMC2130 offers two DIAG output (DIAG0 and DIAG1). You can set those two Outputs to signal errors in realtime to the microcontroller.

Unbenannt2.thumb.png.a9bd9f1c7b4be1d2ace95ff714a49c6a.png

On the stepstick, you can access them via the pins/holes on the middle of the drivers:

IMG_20160308_162735.jpg.3214c8f5b01db6a42368ca5a7a0a0c23.jpg

Unbenannt.thumb.png.3ebdbb9da79b50a3238740715957a41c.png

Today I tested some of the DIAG settings, especially the one for stallguard2. The Diag-Ouputs are interesting because it is easy to make the Ultimaker stop or pause or whatsoever if an external signal (e.g. the DIAG1 signal) comes HIGH/LOW.

That means, using the Diag-outputs, the Ultimaker is able to stop/pause if the driver overheats, the extruder loses steps, the printhead crashes agains the frame, ...

---

If you want to test it yourself, here is the setup I used for teraterm, buspirate (spi mode), the driver and the logic analyzer:

 

; setup4diag1.tllconnect '/C=3 /BAUD=115200'settitle 'Connected to BusPirate'mtimeout = 500sendlnwait '>'sendln 'm'wait '>'sendln '5'wait '>'sendln '1'wait '>'sendln '2'wait '>'sendln '1'wait '>'sendln '1'wait '>'sendln '2'wait '>'sendln '2'wait '>';TCOOLTHRSsendln '[0x94 0x00 0x00 0xff 0xff]'wait '>'; DIAG, Irefsendln '[0x80 0x00 0x00 0x21 0x11]'wait '>'; IRUN, IHOLDsendln '[0x90 0x00 0x00 0x10 0x10]'wait '>'; Chopconf: Microstepssendln '[0xec 0x05 0x00 0x80 0x08]'wait '>'; Coolconf: SG2 Threshold; driver is installed on z-axis.sendln '[0xed 0x00 0x0a 0x00 0x00]'

 

Unbenannt3.thumb.png.75f13c58e1856e7cab09b9aa08f3c68d.png

Wiring:

IMG_20160323_174719.thumb.jpg.14ca1582620b809d895ba2cb5f279bac.jpg

(make sure that all the GND's are connected somehow)

Unbenannt2.thumb.png.a9bd9f1c7b4be1d2ace95ff714a49c6a.png

IMG_20160308_162735.jpg.3214c8f5b01db6a42368ca5a7a0a0c23.jpg

Unbenannt.thumb.png.3ebdbb9da79b50a3238740715957a41c.png

Unbenannt3.thumb.png.75f13c58e1856e7cab09b9aa08f3c68d.png

IMG_20160323_174719.thumb.jpg.14ca1582620b809d895ba2cb5f279bac.jpg

Edited by Guest
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Guys, what kind of application should we test first?

1) Auto Bed Leveling

2) Emergency ShutDown

3) Lost Step/Load Indicator (Extruder) - my favourite

4) no filament detection (zero load)

5) other suggestions?

Edited by Guest

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