Search found 51 matches

by RajaRamesh
Wed Jul 03, 2019 10:58 am
Forum: ESP8266 boards
Topic: Driver for NEMA 17 stepper motor ?
Replies: 15
Views: 514

Re: Driver for NEMA 17 stepper motor ?

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...
by RajaRamesh
Mon Jul 01, 2019 7:57 am
Forum: ESP8266 boards
Topic: LCD 1602 - Library
Replies: 47
Views: 19874

Re: LCD 1602 - Library

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 +=...
by RajaRamesh
Sat Jun 29, 2019 7:00 am
Forum: ESP8266 boards
Topic: Driver for NEMA 17 stepper motor ?
Replies: 15
Views: 514

Re: Driver for NEMA 17 stepper motor ?

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...
by RajaRamesh
Fri Jun 28, 2019 4:36 pm
Forum: ESP8266 boards
Topic: Driver for NEMA 17 stepper motor ?
Replies: 15
Views: 514

Re: Driver for NEMA 17 stepper motor ?

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 ...
by RajaRamesh
Fri Jun 28, 2019 12:02 pm
Forum: ESP8266 boards
Topic: Driver for NEMA 17 stepper motor ?
Replies: 15
Views: 514

Re: Driver for NEMA 17 stepper motor ?

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...
by RajaRamesh
Fri Jun 28, 2019 9:41 am
Forum: ESP8266 boards
Topic: Driver for NEMA 17 stepper motor ?
Replies: 15
Views: 514

Re: Driver for NEMA 17 stepper motor ?

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...
by RajaRamesh
Fri Jun 28, 2019 8:54 am
Forum: ESP8266 boards
Topic: Driver for NEMA 17 stepper motor ?
Replies: 15
Views: 514

Re: Driver for NEMA 17 stepper motor ?

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.
by RajaRamesh
Thu Jun 27, 2019 9:23 am
Forum: ESP8266 boards
Topic: Driver for NEMA 17 stepper motor ?
Replies: 15
Views: 514

Re: Driver for NEMA 17 stepper motor ?

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...
by RajaRamesh
Wed Jun 26, 2019 8:15 am
Forum: ESP8266 boards
Topic: Driver for NEMA 17 stepper motor ?
Replies: 15
Views: 514

Driver for NEMA 17 stepper motor ?

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...
by RajaRamesh
Wed Jun 26, 2019 5:52 am
Forum: ESP8266 boards
Topic: How to switch on a electric bulb with ESP8266 board?
Replies: 50
Views: 1823

Re: How to switch on a electric bulb with ESP8266 board?

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.