Low cost, public domain, stepper analyzer - season 2.
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Hi @PCR, did you manage to get it working? Any problems with the design?
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where are you purchasing acs70331 ?! comet don't hold them, jlc don't have them, mouser offer only dev boards, digikey nothing on stock for ages and min order q is 6000 .. I was looking to get them for another project but ..
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@arhi orderd them at digikey.
Best
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@arhi , this is the digikey part I used https://www.digikey.com/en/products/detail/allegro-microsystems/ACS70331EESATR-2P5B3/8120682
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@PCR do you still have spare boards and parts?
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@zapta I really love your project! Just what I was looking for!
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@PCR what part? QFN also or?
@zapta that's QFN
I need soic and taht's 2.5A I need 5A ..I'll probably go then with 5A regular HAL ACS712 .. it's not fancy GMR but regular HAL but at least I can get it easily .... I hoped I can easily get GMR version in soic8 package but..
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@zapta I'd like to get one of your boards, if you still have one. I sent a private chat message.
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@tenaja, don't have spare boards left but I can make a few for shipping in the US if there is a demand. It will be at cost, and you will need to order the TFT display from buydisplay.com yourself.
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Still have Boards. Will answer all PM today. Stressfull weeks... Sorry
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@PCR I will take one! (If you can ship to USA.)
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@arhi said in Low cost, public domain, stepper analyzer - season 2.:
@zapta that's QFN I need soic and taht's 2.5A I need 5A ..
SOIC is definitely easier to solder and I would love to find one.
I modified the QFN footprints on the board be easier to hand solder, having longer pads, somewhat similar to the Schmartboard boards.
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In SOIC parts, ACS724LLCTR-05AB-T is very good, much better than ACS712 in our experience. We use them in our latest automated test equipment.
Duet WiFi hardware designer and firmware engineer
Please do not ask me for Duet support via PM or email, use the forum
http://www.escher3d.com, https://miscsolutions.wordpress.com -
@dc42 said in Low cost, public domain, stepper analyzer - season 2.:
In SOIC parts, ACS724LLCTR-05AB-T is very good, much better than ACS712 in our experience. We use them in our latest automated test equipment.
Thanks, I'll try to find them, I started using JLCPCB full service recently so I try to go with parts they have (and acs712 they do have on offer). will see what else is there but if I can get easily acs724 (issue with digikey is that shipping is rather expensive so I wait till I have a need for more parts to order something to spread the shipping cost on to more parts
as I pay same for 1 and for 1000 parts, same small box) locally I don't mind soldering them myself ... those QFN I really hate and if JLC had them it would be no problem as they would solder them on but ... they don't -
@zapta's stepper motor analyzer is the star of this Teaching Tech video! https://youtu.be/4iII25DGIdA
Ian
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@droftarts, he did a very good job IMO, precise and informative.
There are two analyzers shown in that video, one with the standard base and another with the enclosed case design. Functionality wise they are identical and the open frame design is easier to build and therefore the default option.
The enclosed case is documented in the link below but is more complex to build so I am not sure it worth it.
https://github.com/zapta/simple_stepper_motor_analyzer/blob/master/case_option.md
And the Onshape design is at https://cad.onshape.com/documents/146b8b994145177887407b23/v/c2dc7870c6f0bf989cd611b5/e/b6453eca2ba530476c30538a
BTW, how does your analyzer progress? Any problems?
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@zapta I sent it to Tony, who has the equipment and time to put it together! However, we’re waiting for screens to come from China. I think we’re going to use the 411 Blackpill, as the 401 seems unavailable.
Ian
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@fma Hello, Sorry to be so late getting on the bandwagon with this, but I would definitely buy the PCB and SMT components, even ALL the parts if possible. I live in Switzerland. Please let me know what you need from me to do this. Thanks so much!
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@zapta And now on Hackaday: https://hackaday.com/2021/04/23/stepper-motor-analyzer-reveals-all/
Ian
Cartesian bed-slinger with Duet 3 Mini 5+ WiFi and 1LC : RRP Fisher Delta v1 with Duet 2 Maestro : TronXY X5S with Duet 3 MB6HC and Roto toolboard
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@stepperanalyzer I don't think anyone is producing a kit at the moment. It's an open source project, so you can send the files to a PCB manufacturer and get them to populate the board for you. You'll probably have to find the Blackpill (the 401 version seems to be out of stock everywhere, but the 411 version is available) and the display yourself.
Ian
