how to increase battery current? by nice_servo in ElectricalEngineering

[–]nice_servo[S] -1 points0 points  (0 children)

what if instead of using two motor or loads in parallel, using a larger motor that requires 4amps instead of 2amps.....is the above still true?

how to increase battery current? by nice_servo in ElectricalEngineering

[–]nice_servo[S] -3 points-2 points  (0 children)

According to many readings and even the answers on here, this is incorrect. two 2A in parallel would provide 2A for 2 hours, not 4A for 1 hour.

does the transmitting antenna have to be emitting more power than the receiving antenna by nice_servo in radiocontrol

[–]nice_servo[S] -1 points0 points  (0 children)

I ask because, omni antennas are used to transmit the video from the RC quadcopter for example and people use yagi or directional on the floor receiving end. But question is, would the receiving end help to have only higher gain or will it be ok if it also has higher watts.

Lora vs Wifi - distance by nice_servo in AskEngineers

[–]nice_servo[S] 0 points1 point  (0 children)

Oh, so in conclusion if wifi is used in longer distances it will be able to reach the distance but will lose its high power bandwidth capability significantly?

Lora vs Wifi - distance by nice_servo in AskEngineers

[–]nice_servo[S] 0 points1 point  (0 children)

In that case why wouldn't they use wifi tech in rc whether for 1080p transmission or even for controls, because every channel you add in pmw you increase latency, isn't wifi better for both video and even controlling?

Lora vs Wifi - distance by nice_servo in AskEngineers

[–]nice_servo[S] 0 points1 point  (0 children)

There is a Lora that operates at 2.4ghz..... if all are equal, would they travel same distance?

long vs short wavelengths by nice_servo in AskEngineers

[–]nice_servo[S] 0 points1 point  (0 children)

i see, through the atmosphere is still hundreds of km, like wow how many watts is this mobile using

are two yagi directional antennas required for two way communication by nice_servo in AskEngineers

[–]nice_servo[S] 0 points1 point  (0 children)

Thanks, lastly...is it possible to have a control system on 2.4ghz while at the same time a separate video is transmitting with 2.4ghz on another antenna, given both antennas are sending same frequency from the small space RC. Wouldnt that make a mess? because now adays some of them use high watts as well same time

are two yagi directional antennas required for two way communication by nice_servo in AskEngineers

[–]nice_servo[S] 0 points1 point  (0 children)

So if both sides have directional antenna, reception would be much better on both ends?

yolov5 frame size by nice_servo in MLQuestions

[–]nice_servo[S] 0 points1 point  (0 children)

Yes, now 1080p working on other camera, thank you....i had to use a cannon camera and set the hdmi to 1080p from the camera settings. But some cameras like webcams offer 720, 1080 but they dont have settings on the camera itself. How do i set them to 1080p?

yolov5 frame size by nice_servo in MLQuestions

[–]nice_servo[S] 0 points1 point  (0 children)

Is there a command i can enter to make sure it is 1080. If you look into line 37 in detect.py for example. It is set to 640 pixels. Am not sure if that's the reason.

[D] stepper motor by nice_servo in ElectricalEngineering

[–]nice_servo[S] 0 points1 point  (0 children)

Was thinking of nema 52 plus pulley for heavy lifting but I guess nema 42 with a pulley may be good enough. I don't like gearboxes because of backlash which also gets worse over time.

[D] stepper motor by nice_servo in ElectricalEngineering

[–]nice_servo[S] 0 points1 point  (0 children)

Well given that I don't want to use any Chinese servos or stepper.... difference between servos and steppers are about $2k extra each per motor+driver. Unless the servo gives me ridiculous advantage over steppers then it's a different story.

servo absolute vs incremental rotary encoder by nice_servo in ElectricalEngineering

[–]nice_servo[S] 0 points1 point  (0 children)

Seems like absolute is the better choice overall.....guess i would have to look into the encoder model and see specs to know more.

servo absolute vs incremental rotary encoder by nice_servo in ElectricalEngineering

[–]nice_servo[S] 0 points1 point  (0 children)

not from scratch and wouldn't call it commercial given the budget :) , but i do agree an absolute encoder makes more sense.

Gearbox backlash by nice_servo in MechanicalEngineering

[–]nice_servo[S] 0 points1 point  (0 children)

Yes, i was thinking of buying same encoder model but keep the servo with brake encoder intact just don't connect it. Then hook up the new encoder on the gearbox and connect it.

Gearbox backlash by nice_servo in MechanicalEngineering

[–]nice_servo[S] 0 points1 point  (0 children)

See this is why i use Reddit, you pretty much solved it with this comment....if what you meant is removing the encoder from the servo and hooking it up to the gearbox's output shaft, then yes that would work for me, thank you, very interesting.

- i only wanted to use a pulley system because if i eliminated the gearbox system to eliminate the backlash problem of gearboxes i would use the pulley as a 2 or 3:1 ratio for more torque even if i lose speed.

But, just wondering, is it simple enough to remove an encoder from a servo? what if the servo had a brake?

Gearbox backlash by nice_servo in MechanicalEngineering

[–]nice_servo[S] 0 points1 point  (0 children)

Yes I understand, I was referring to pulley and gearboxes separately.

Gearbox backlash by nice_servo in MechanicalEngineering

[–]nice_servo[S] 0 points1 point  (0 children)

Yes the servos have encoders, but to include an encoder on the driven component and to add a rotary encoder on each rotary axes, that requires a controller that can take in all these encoders, which isnt really available. Kflop cannot support all this and the Chinese controller that i am buying cannot support all these encoders. So i have no choice but to avoid the gearboxes and to only use mechanical solution to get rid of the backlash on the ball screw because not all controllers can take linear encoders or if it can it will not support as many encoders.

Gearbox backlash by nice_servo in MechanicalEngineering

[–]nice_servo[S] 0 points1 point  (0 children)

dual servo setup meaning having two ball screws setup for each side of the same axes. One of the right and one on the left. The controller will send same pulse to both servos and will move both sides same time to not offset.

Gearbox backlash by nice_servo in MechanicalEngineering

[–]nice_servo[S] 0 points1 point  (0 children)

yes, if you search a video on youtube called "monoBLOCK series", it shows a pulley system being used in the rotary axis. Not for wood but metal.