MicroPython Forum (Archive)

I'm still irritated by you statement about the distance: (i.e 500 to 1000 meters or above) That is quite a number and requires solid construction work, with intermediate supports, solid belts and large engines, ... Clearly beyond of what is normally considered here. So are these numbers correct? Hi...

In particular, this code: msg = 'This is a scrolling test. ' if (len(msg) < lcd.num_columns): msg += ' ' * (lcd.num_columns - len(msg)) for i in range(len(msg)): len2 = min(lcd.num_columns, len(msg) - i) len1 = lcd.num_columns - len2 msg2 = '' if len2 > 0: msg2 += msg[i:i+len2] if len1 > 0: msg2 +=...

I agree with @jimmo: You don't need the precise positioning that a stepper provides since you are moving the object over distances much larger than the size of the motor. Thanks for updating the diagram. Is this a conveyer belt? How heavy is the belt? Is the belt being supported? You are going to n...

I'm not quite sure I understand the diagram sorry. Is the object supported vertically by the same rope that's moving it side to side? Or is hanging on a different (tight) rope, and you have a separate line connected to the motor to pull it? What does the pulley do, etc. Also I'm not sure a stepper ...

Then you need to calculate static and dynamic friction of your system. And then whatever acceleration you want to provide to the object. But 1000 metres?? You've got a bunch of other practical considerations to worry about. Like 1000m of rope probably weighs more than your object! Hi Jimmo, it will...

As OutOfTheBOTS_ has mentioned, motors provide torque, so to answer your question you need to reformulate it in terms of the torque that the motor must provide. i.e. if you're verrically lifting 1.5kg (~15 N) using a rope wrapped around a 50mm diameter drum/spool, then the holding torque is 0.025 x...

OutoftheBOTS_ wrote: ↑

Thu Jun 27, 2019 9:18 pm

You need to choose a stepper motor that will provide enough torque for the job that you will be using it for

Hi OutoftheBOTS, i have less knowledge on stepper motors. so, which stepper motor is suitable to hold an object (weights arround 1.5kg and less) and move from one end to other end.

Thank you both for sharing the details. i am going to buy below mentioned items. please let me know if i am choosing wrong once. stepper motor:- https://www.amazon.in/BestPriceEver-Bipolar-Robotics-Two-phase-four-wire/dp/B07MQSCBGN/ref=sr_1_7?keywords=nema+17+bipolar+stepper+motor&qid=1561626524&s=g...

Hi All, After watching few videos on stepper motors in youtube , i am interested in developing small project with Nema 17 stepper motor(Assuming this motor will fit to my project) with ESP8266. My basic idea is to move an object from one end to other end with the help of rope(which will hold the obj...

Roberthh wrote: ↑

Tue Jun 25, 2019 10:23 am

You should try the driver made by @pythoncoder https://github.com/peterhinch/micropyth ... ter/DS3231
It was made for PyBoard, ESP8266 and others.

Thank you very much Robert for sharing the details. i will try and get back if i have any questions.