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Blog Garbage Collector #8 Clamp Improvement
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  • Author Author: wanfp97
  • Date Created: 1 Oct 2020 4:44 PM Date Created
  • Views 521 views
  • Likes 3 likes
  • Comments 0 comments
  • xmc4700
  • sustain_the_world
  • xmc
  • ferrite core
  • jitter
  • servo
  • infeneon
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Garbage Collector #8 Clamp Improvement

wanfp97
wanfp97
1 Oct 2020

Blog List:

Garbage Collector #1 Introduction

Garbage Collector #2 Clamp testing

Garbage Collector #3 Seeking help from Infineon's Technical Supports

Garbage Collector #4 Some basic interactions with the shields

Garbage Collector #5 Base testing

Garbage Collector #6 Wireless Controller

Garbage Collector #7 Clamp and Base

Garbage Collector #8 Clamp Improvement

Garbage Collector #9 Doubling the maximum current

Garbage Collector #10 Summary

 

In my previous post, I have faced some problems where my clamp is not strong enough and also some jitter in my servo motor. Thanks to the suggestion from the members of Element14 Community, I was able to solve it by the following steps:

 

Clamp not strong issue workaround:

i) Adding rubbery surface as per suggested by the members of Element14 Community:

image

ii) Use hot glue gun to fix the shaft and the gear:

image

iii) Let clamp to continue applying a smaller force instead of completely stopping after successfully clamp the target:

image

Note that I'm using a 360-degree servo motor for clamping so the PWM duty cycle is to determine the direction and the force of the servo motor, unlike the normal 180-degree servo motor which uses the PWM duty cycle to determine the angle.

Here I programmed the servo motor to continue turning inward but with a smaller force after the button is released so that it will continue to apply force to hold the target.

 

Servo motor jitter issue workaround:

i) Setting multiple waypoints with delays in between:

image

Note that this servo motor is a 270-degree servo motor that will use the PWM duty cycle to determine its angle.

 

ii) Adding Ferrite core to the servo motor's wire.

I actually got this idea from the YouTube video below which demonstrates how adding a Ferrite core helps in solving the jitter issue:

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imageimage

adding the Ferrite core.

 

I have also added a compartment to the bin so that it can keep metals and non-metals item separately:

image

 

I have updated the GitHub files in the following link: https://github.com/wanfp97/GarbageCollector

 

After adding all these things to the Garbage Collector, the Garbage Collector gets too heavy and move too slow. I have managed to solve it but adding it to this blog post will make this post too long so I will just put it in my next blog post.

I will let you guys see the working video after I solve these issues:

 

image

in this video, the second target didn't get in the bin as intended. I will try to make some adjustments to resolve this issue.

That's all for this blog, see you next blog.

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