Hey guys,
is it possible to count the spets of the motor, if I am rotating the shaft manually?
Thanks
Regards
If its not connected to a driver, the phases will generate voltage as the motor turns, but at low speed
it will be low voltage.
xyproblem: What are you really trying to do?
I suspect the simple answer is NO.
...R
MarkT:
If its not connected to a driver, the phases will generate voltage as the motor turns, but at low speed
it will be low voltage.xyproblem: What are you really trying to do?
I am building a camera slider with a stepper motor. So basically I choose a start point, then I slide manually the slider to the end point. The end ponts are every time different so I need something to capture the steps. After the steps are captured the slider goes back to the start point. I found out that I could do that with a hall effect sensor which determinates the magnets in the stepper motor. Is that possible with this sensor? There are also stepper motors with a built in encoder but they are too expensive.
You can't use hall sensors with a stepper motor, they don't work like that. (well it could be
done by burying the sensor inside the pole pieces I suppose, not trivial)
An encoder is a good way to do this - with an encoder and a feedback loop you could just use
a DC motor (as a positional servomotor)
You could use a jog control to position it, rather than manual pushing, then a stepper is fine.
MarkT:
You could use a jog control to position it, rather than manual pushing, then a stepper is fine.
That would be my preferred option. You could have a separate button to press when you want the position to be remembered.
...R
The idea behind that is to control it with a joystick. Just thought it would be also nice to set the endpoint manually if preferred.
Thank you guys for the help.
Melobih:
The idea behind that is to control it with a joystick.
Can't you use the Joystick to do the jogging?
...R
The idea behind that is to control it with a joystick. Just thought it would be also nice to set the endpoint manually if preferred.
In the old days of Commodore 20/64 the joysticks came with a fire button.
You might use one of those (I have no idea if today's joysticks come with an extra fire button or not - sorry - no gambler ..) if it comes with that button to use the joystick as main control and the fire button to control the endpoint manually.
Hope I understood your approach in the right way.
Robin2:
Can't you use the Joystick to do the jogging?...R
Yes, I meant that. Im gonna do it like you said -> press button for start point, move the slider with the joystick to the end point-> press again the button for the end stop.
rpt007:
You might use one of those (I have no idea if today's joysticks come with an extra fire button or not - sorry - no gambler ..) if it comes with that button to use the joystick as main control and the fire button to control the endpoint manually.
Thats what I'm going to do, I have a joystick with a "built in button", so I don't need any additional buttons.
get a stepper with built in encoder usually a round disk with slotted holes around it a photosensor counts the slots as motor turns if moving manually you have to remove power to stepper but not the photo part consider it a mechanical opto coupler
Stepper with built in rotary is imho an overshoot for this project.
As long as the stepper doesn't get in an overload situation it will be very precise and you can count the steps easily.