I tweaked Adafruit's servo example to send data to only the first port and then instructed it to go to the lowest position. I confirmed the sole active port and unplugged it from the commanding Arduino, but I kept power attached, and the chip continued signaling the motor. I measured the pulse widths with the pulseIn() function, and they held steady near 1,018 microseconds. When I measured with interrupts, I saw the timing was almost exactly 1,000 microseconds and hovered very tightly. The difference between the smallest and largest reading was sloppier with the pulseIn() method.
In conclusion, the signal from the PWM generator is more consistent with less than 1% jitter compared to the 1.4% and 2.4% from the Arduino. The issue may be something other than the timing pulses but rather a mismatch between the motor components and the magnetic field. Discrepancies like this could explain the jolts I've felt while riding. I may need to add a motor speed sensor and integrate that into my sketch.
The rest of the posts for this project have been arranged by date.
First time here?
Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Completed projects from year 8
Disclaimer for http://24hourengineer.blogspot.com and 24HourEngineer.com
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information on this blog, or linked by this blog, is not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property, or similar, is the responsibility of those involved in the replication.
All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.
Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim property or assets based on their post.
This blog, including pictures and text, is copyright to Brian McEvoy.
2022-11-04
In conclusion, the signal from the PWM generator is more consistent with less than 1% jitter compared to the 1.4% and 2.4% from the Arduino. The issue may be something other than the timing pulses but rather a mismatch between the motor components and the magnetic field. Discrepancies like this could explain the jolts I've felt while riding. I may need to add a motor speed sensor and integrate that into my sketch.
The rest of the posts for this project have been arranged by date.
First time here?
Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Completed projects from year 8
Disclaimer for http://24hourengineer.blogspot.com and 24HourEngineer.com
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information on this blog, or linked by this blog, is not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property, or similar, is the responsibility of those involved in the replication.
All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.
Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim property or assets based on their post.
This blog, including pictures and text, is copyright to Brian McEvoy.
2022-11-04
Comments
Post a Comment