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| Actuator Project ( Was MRotate4) |
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| DaOld Man:
Sounds good. That is an old drawing. Please be aware with that wiring plan you cannot use dynamic braking, because at end of travel one limit switch will open, disabling that direction to the drive. Applying dynamic braking will make the monitor jerk in opposite direction until that limit closes, then the monitor will be off alignment. Let me know what you come up with. |
| pixel.arcade:
I made a drawing that amateur as I love it. ::) Everything works correctly, the limit keys are ok. https://photos.app.goo.gl/X8sHYybMj2sGYdpe6 Some doubts The next step would be to add a diode on the "foward, reverse" wire. The question of booting windows the engine performs some movements, how to get around the situation. |
| PL1:
--- Quote from: pixel.arcade on October 15, 2020, 12:36:49 pm ---The question of booting windows the engine performs some movements, how to get around the situation. --- End quote --- You could put a DPDT delay relay on the 12v and ground lines between the driver and motor. If you get a relay that temporarily energizes as soon as power is applied: - Use the NC and COM contacts - When power is applied, the relay energizes, disconnecting the NC and COM terminals. - Set the delay time long enough that the motions are done before the relay de-energizes, reconnecting the NC and COM terminals. If you get a relay that does not energize as soon as power is applied: - Use the NO and COM contacts - When power is applied, the delay circuit waits to energize the relay. - Set the delay time long enough that the motions are done before the relay energizes, connecting the NO and COM terminals. You can get relays that use either 110VAC, 220VAC, or 12VDC to power the timer circuit and coil. - 12V from a Molex or SATA power is probably the easiest way to go. Delay relays come in a variety of delay ranges. - Choose one where your desired delay is in the mid-range of the spec, not the extreme end. - For example, if you need a 14 second delay, get a 0-30 second relay instead of a 0-15 second or 0-30 minute relay. The Omron H3Y-2 (or similar) is a popular choice for an application like this. Scott |
| DaOld Man:
What PL1 said. However, if you use the timer relay on the wires to the motor, it will have to be heavy enough to handle the current of the motor. You can also use a DPDT timer on the forward and reverse wires from the serial port to the drive. The current on these wires should be very low, probably milliamps. Let me see if I can find a timer that would work for you on the internet. Any idea how long of a delay it needs to be? (How long for PC to boot from power on to windows desktop.) Appreciate the video, it is very informative. If that drive is doing ok now, without the diodes between the drive and serial port outputs, then you probably wont need the blocking diodes, but it sure wouldnt hurt to install them if you want. RopiJo has a similar setup on his rotating rig, maybe he can share what timer he used. |
| DaOld Man:
Heres one I found on amazon. 12 VDC DPDT 0-60 secs (make sure thats enough time). https://www.amazon.com/Delay-Timer-Relay-Second-Socket/dp/B07QKDTP34/ref=sr_1_26?dchild=1&keywords=timer+relay&qid=1602799993&sr=8-26 I dont know where you live. I do know some people on here that live not in USA say they have a hard time ordering stuff. |
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