Recent content by Wrigley

  1. W

    stepper motor unipolare in full step

    Great information and creating symbols that can be altered easier during testing. Didn't think out of the box like that. Thanks I'll try these. Mike
  2. W

    stepper motor unipolare in full step

    Hi Alan Thanks for your quick reply. I'm using normal English language as far as I know on pe6. Yes I noticed that after I pasted my code into (code)(code) the pause changed into break, text was shifted etc. I had to google how to do that (code/ code) etc not having done it before, maybe I made...
  3. W

    stepper motor unipolare in full step

    Hi all Hope your Christmas break was kind to you all things considered. Having spent some time on this forum I realized that I made some mistakes on my crane stepper codes. So I purchased the picaxe AXE023 which is the prototype board which has 08M2 and L293D to experiment with. It also has a...
  4. W

    stepper motor unipolare in full step

    Hi guys @AllyKat. I cleaned up my circuit by adding some capacitors. 100nF for 08 and l293. A 68mfd for 08 and 22mfd for L293. Trial and error basis. Also I used two separate battery packs. And I was successful in downloading a code. I experimented with ‘disconnect’ but found it was not...
  5. W

    stepper motor unipolare in full step

    Morning Guys. Just looked at your link. 6volts divide by 9.3 ohms is 645mA (0.645v). The max continuous current the L293D can do is 600mA (0.6A) (peak 1.2A) per channel. It would be good to see what results you get from measuring one coil current. The L293 might work a bit but will get very...
  6. W

    stepper motor unipolare in full step

    Hi Nandino I translated your text. Hi, when I bought the picaxe in the starter kit there is a mini breadboard with the 8 pin socket and the programming jack I have always programmed the picaxe using that. For the c.0 there is a jumper to move prog / out0 when I downloaded the prog. I remove...
  7. W

    stepper motor unipolare in full step

    Hi again just before your lastest input which I have read I'll tell you what I did. As I say I normally puts caps on silly of me not to in this case. But before I did I connected the bench psu set to 7 volts to pin 8 of the L293D and the 5v battery to the 08m2. Pulled out the c.0 lead and...
  8. W

    stepper motor unipolare in full step

    Hi AllyCat The current of the pic and stepper was 140mA not rotating. No debugs, SERTXD etc. Yes I normally add caps but didn't on the bread board so I've just connected it to a 6v oneloop NIMH pack and loaded with a high low type code as you mentioned and it works. stepper rotates clockwise...
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    stepper motor unipolare in full step

    Hi to allycat and PieM Just a quick update. You are correct about not needing step5, my mistake probably a hangover from getting the 08M2 to work - I've removed it now, thanks. I looked on other picaxe types and indeed found the older 08M C.0 is joined to IN1 and C.1 to IN2 of the L293D (lets...
  10. W

    stepper motor unipolare in full step

    Hi to Nandino and all others on this thread. This is an interesting topic you have posted. Controlling steppers should be fairly easy but in practice not so. I've have made stepper circuits before and they work straight away but then others I spend hours messing about trying to get it working -...
  11. W

    stepper motor unipolare in full step

    Hi Nandino Your questions help me to learn as well. Legs means the actual physical metal leg and pins refer to the what it does like serial in, readadc etc. But on threads written by beginners they may write the wrong thing so we have to be careful. STEPPER I looked on google for your stepper...
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    stepper motor unipolare in full step

    Also Nandino watch out faulty steppers. I recently bought ten micro steppers and five of them had no wire on one coil and some had coil resistance of 40 ohm (40R) not 20R, so I may have to increase the uln2003 driver voltage.
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    stepper motor unipolare in full step

    Hi Nandino I'm a bit late for this thread but thought I'd add this anyway. I have a 28BYJ-48 uni-polar stepper to rotate my model crane project. I've put my crane post in the Robotics section, and attached my program file here also. I had delays so I added the suspend and resume commands so that...
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