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Post by halfson on Mar 29, 2017 4:57:21 GMT -7
Hi, I want to use push-pull solenoids with dobot to push buttons of a smartphone, below you can see the pre-setup. I'm going to use the circuit in the second image to drive solenoid but I can't find to trigger the ARDUNIO_DIGITAL_OUT by MAX's code. And I shoud do this for 5 solenoid, anyone have idea?   |
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Post by Max on Mar 29, 2017 21:15:21 GMT -7
You could use Laser, Pump and Valve outputs right away. In both FPGA and RAMPS they are wired to 12V outputs. There a relay comes with the FPGA board that manages laser, so it may be able to handle solenoid (depends on your solenoid characteristics) without a transistor provided you do connect the diode line in the diagram above for when solenoid is de-energized (reverse current due to inductance). The pump and valve drivers may not be able to handle a solenoid because of the significant current spike when solenoid is energized (same inductance resists). Though valve in dobot (attached to the pump) is in fact a solenoid, just no idea about its characteristics). In RAMPS there are these MOSFETs that are wired to Laser, Pump and Valve commands in open-dobot. Check out this post and topic that explains a little more. If that doesn't suit you, you could extend open-dobot to wire any other pin from those listed in "calibrationPins" (board-dependent). Take laser/pump/valve as an example. But, apart from the details, it doesn't seem like a good idea to use solenoids for that application. They are not gentle and literally shoots the plunger as hard as it can. Is there a problem with just telling dobot to press the button (move in Z axis)? |
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Post by halfson on Apr 3, 2017 1:19:22 GMT -7
I think I will try to use "calibrationPins",
"Is there a problem with just telling dobot to press the button (move in Z axis)?" I need to push smarthphone's volume - , + and the power button which are on the right side so I must move in X-Y axis. But dobot doesn't have enough force to do it.
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Post by Max on Apr 20, 2017 8:12:30 GMT -7
So you're not planning to attach solenoids to dobot?
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