Adafruit Motor Shield v2.0 Stepper programing

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Newbie64
 
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Re: Adafruit Motor Shield v2.0 Stepper programing

Post by Newbie64 »

I have couple of new questions;
1) I just bought stepper motor PN 324, for my application it appears it may not have enough drive torque in which to turn my needle valve and the motor slips. I am sorry but I am not sure how much force is required to rotate the valve, if I remove the packing from the valve stem it can rotate it however it needs to have the packing to keep from leaking. So does Adafruit have a stepper motor with a greater drive torque value or do you have any suggestion? ( I am powering the motor with a 12Vdc 2amp power supply)

2) When I increase the rpm value it has no effect on the motor speed, the code I am running with was posted previously in this form.

3) I have added the ability to monitor temp from a board that is a RTD to digital converter (from playing with fusion had you offered such a board I would have purchased it here, sorry) that reads a PT100. For my project I would like to control the valve opening via the temperature read and/or timer. Do you know of any examples by which I my gleam ideas as how to accomplish this?

Thank you for any suggestions you my have,
Newbie 64

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adafruit_support_bill
 
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Re: Adafruit Motor Shield v2.0 Stepper programing

Post by adafruit_support_bill »

To increase the torque, you move to a more powerful motor, or add gear reduction. https://learn.adafruit.com/adafruit-mot ... red-motors
We have a small selection of link-belts & toothed pulleys in the store. Suppliers such as McMaster Carr have a wide selection of gears pulleys etc.
We do not carry any more powerful motors. There are several on-line sources for industrial stepper motors. Read the motor specifications carefully to determine if it is suitable for use with the shield.
https://learn.adafruit.com/all-about-st ... he-stepper

With high step-count motors, the maximum step rate is limited by the 12c bus-speed. This can be increased. See the bottom of this page: https://learn.adafruit.com/adafruit-mot ... rduino/faq

The SousViduino project is one example of temperature-based feedback control. https://learn.adafruit.com/sous-vide-po ... us-viduino

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