Stepsticks on Duet3 6xd.

gabbie

Hi all,

Just a general question really. I have a duet3 6xd with which I was planning to use TMC5160 drivers from mouser.uk (TMC5160SilentStepStick).

Do I just connect it up as stated with a 10k pull up?

"To connect a Pololu/StepStick/similar driver to the 6XD a 10K pullup resistor is needed from the Step/Dir/En lines to +5V" Is it that simple? I thought I'd ask before I shell out.
Thanks
Gabbie

dc42

@gabbie you would need to invert the Step line too because it is active low. The DIR polarity can be changed using M569. The Enable polarity is selectable.

Why not use a 6HC instead?

gabbie

@dc42 Hi. Thanks for the quick reply. I was bought a 6XD as a present that was supposed to be fitted to a cnc machine. My plan has changed to a laser engraver/cutter but I still have the 6XD. I have a duet2 wifi which I could use using the logic converter as described in these forums, although I had other plans for it. I have some choices that I am thinking through.

But the short of it is that I could use stepsticks but maybe the DM556 would also be a good choice for a laser rig.

gabbie

@dc42 Hi dc42,

I have decided to use the duet2 wifi but am still confused about the linear conversion module or 74HC board that goes between Duet2 and laser.

https://forum.duet3d.com/topic/12283/add-laser-for-duet2-wifi

Is there a board that is available through amazon?
https://www.amazon.com/Voltage-0-100-Linear-Conversion-Transmitter/dp/B00U7GJDVO

or is it better to self build through EasyEDA?

or Can I use zenors as in the analogue circuit design?

Sorry, this question is now probably in the wrong section.

I have trawled through all the forum but am still alittle confused as to which route is the best to take.

Thanks Kindly
Gabbie

https://www.amazon.com/Voltage-0-100-Linear-Conversion-Transmitter/dp/B00U7GJDVO

Thanks, Gabbie

gabbie

@dc42

Hi dc42, I'm crazy and have treated myself to a 6HC (love Duet3D) but....

Going back to stepsticks, TMC5160, on the 6XD. Would a 74HC04 hex inverter serve to invert the Step line? and then the Enable polarity, selected via the jumper, would be bridged to GND being in the "right" position (The TMC5160 DRV_ENN is active low). Then all lines are pulled up with 10k resistors.

This is probably a little advanced for me but I would love to get the 6XD running as well. And I have the time to learn.

I also found the relevant information in the Duet documentation that answered my last questions. Sorry for the time wasting.

Gabbie

dc42

@gabbie said in Stepsticks on Duet3 6xd.:

Going back to stepsticks, TMC5160, on the 6XD. Would a 74HC04 hex inverter serve to invert the Step line? and then the Enable polarity, selected via the jumper, would be bridged to GND being in the "right" position (The TMC5160 DRV_ENN is active low). Then all lines are pulled up with 10k resistors.

Yes, that should work. But you wouldn't be able to set the other TMC5160 parameters using SPI, so you would be limited to current, microstepping and mode values you can set statically by connecting the TMC5160 pins appropriately.

Also bear in mind that stepsticks don't include the important electrolytic capacitor that you need to connect between the motor input voltage and ground.

gabbie

@dc42 Hi all,

So in essence I need to make these

Along with the inverter chip and pullups.

I also need to cut the traces on the TMC5160 stepstick boards as shown here. Although I haven't worked out which to cut or not cut yet. I would be grateful if I could get some hints on that.

TMC5160 _traceCuts.jpg

I can use the below document to calculate the necessary settings. Microstepping is fairly obvious and I would dipswitch these for easy changes. I think I just need spreadCycle and Not stealthChop (I'm not worried by sound levels etc) and I also I won't need hold current reduction. I'm not sure how to read the current settings. IRun =16 etc is a bit of a mystery to me at the moment.

I am at present gathering all the information together and will most likely EasyEDA a schematic and post that up. I am in no hurry. Thanks for the help, Gabbie

dc42

@gabbie said in Stepsticks on Duet3 6xd.:

Going back to stepsticks, TMC5160, on the 6XD. Would a 74HC04 hex inverter serve to invert the Step line? and then the Enable polarity, selected via the jumper, would be bridged to GND being in the "right" position (The TMC5160 DRV_ENN is active low). Then all lines are pulled up with 10k resistors.

Yes, a 74HC04 can be used to invert the Step line. Make sure that you feed 5V to VIO on the TMC5160, and don't forget to add the necessary electrolytic capacitor between VIN and GND on the TMC5160.