Difference between revisions of "Two Axis Stepper Controller"
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== Arduino Software == | == Arduino Software == | ||
| + | In the old days I would have writen the code from the ground up. With the arduino you can often get a well tested library for this. I found the following and decided to use it. | ||
| + | *'''[http://www.airspayce.com/mikem/arduino/AccelStepper/index.html AccelStepper: AccelStepper library for Arduino ]''' | ||
| + | |||
| + | For a long time I have had a belief that almost all arduino programs should have some sort of serial interface. And this is what I did for this project. The arduino is sent commands, typically a single character optionally followed by a number. From the help command built into the program here is a summary of the commands: | ||
| + | |||
| + | <pre> | ||
| + | # <<< Arduino: TwoAxis Ver1 2017 11 13.25 | ||
| + | # <<< mnn chooseMotor | ||
| + | # <<< tn move to Target n | ||
| + | # <<< t-n save Target n | ||
| + | # <<< pn cmotor nudge n !! | ||
| + | # <<< snn cmotor setSpeed | ||
| + | # <<< ann cmotor setAcceleration | ||
| + | # <<< dnn doDance | ||
| + | # <<< z both motors zeroPosition | ||
| + | # <<< w statusReport WhatWhere | ||
| + | # <<< v Version of software | ||
| + | # <<< ? Help | ||
| + | # <<< ok | ||
| + | |||
| + | </pre> | ||
Revision as of 08:51, 14 November 2017
What
For some time I have wanted to aim a laser with good precision across a room. Long time ago I did this with servo motors, Worked fine excpt for the good precision. I thought that steppers might do better. The problem is that steppers move ( typically ) over a degree per step. Gearing the motor down decreases the speed, but improves the precision. These can be cheap ( Amazon.com : Longruner 5x Geared Stepper Motor 28byj 48 Uln2003 5v Stepper Motor Uln2003 Driver Board for arduino LK67 : Camera & Photo ) With these in hand and a 3D printed mount ( *Bare Bones 28BYJ-48 Gimbal. by mmontee - Thingiverse ) for them I went forward with the software.
How
Laser/Motor Mount
These can be cheap ( Amazon.com : Longruner 5x Geared Stepper Motor 28byj 48 Uln2003 5v Stepper Motor Uln2003 Driver Board for arduino LK67 : Camera & Photo ) With these in hand and a 3D printed mount ( *Bare Bones 28BYJ-48 Gimbal. by mmontee - Thingiverse ) for them I went forward with the software.
Arduino and Driver
These can be cheap ( Amazon.com : Longruner 5x Geared Stepper Motor 28byj 48 Uln2003 5v Stepper Motor Uln2003 Driver Board for arduino LK67 : Camera & Photo ) With these in hand and a 3D printed mount ( *Bare Bones 28BYJ-48 Gimbal. by mmontee - Thingiverse ) for them I went forward with the software.
Arduino Software
In the old days I would have writen the code from the ground up. With the arduino you can often get a well tested library for this. I found the following and decided to use it.
For a long time I have had a belief that almost all arduino programs should have some sort of serial interface. And this is what I did for this project. The arduino is sent commands, typically a single character optionally followed by a number. From the help command built into the program here is a summary of the commands:
# <<< Arduino: TwoAxis Ver1 2017 11 13.25 # <<< mnn chooseMotor # <<< tn move to Target n # <<< t-n save Target n # <<< pn cmotor nudge n !! # <<< snn cmotor setSpeed # <<< ann cmotor setAcceleration # <<< dnn doDance # <<< z both motors zeroPosition # <<< w statusReport WhatWhere # <<< v Version of software # <<< ? Help # <<< ok
