my question is regarding vacuum pump. suppose a 12V dc vacuum pump is used to take out air from bag, how much of volt battery and how many do i need?
@avs An air pump usually has a rating in cubic feet of air per minute (at a rated voltage). If not, you’ll need to know the rated voltage and test how fast it can evacuate air.
i tried to use four 150 rpm dc motors via 12V,500 mA dc adapter but it’s not working.Please suggest the correct way.
@Suwarna We would need a lot more information about the motors, your setup etc. Please create a new topic on the RobotShop Forum and provide details.
hai im currently doing my final year project need your guide on selecting 12v dc motor wattage so that it be able to move my load 5kg(max) forward and reverse that will be controlled by my microcontroller
@shaera We suggest taking a look here: https://www.robotshop.com/blog/en/drive-motor-sizing-tool-9698
I used a motor from electro kit whose imput current is not mentioned shall i test it with 12 v adapter reply fast
@Dhiraj If you are not sure what the input voltage is, and cannot find it anywhere (even after contacting the manufacturer), then it’s best to start low at 6V.
I want to use small 12 Volt DC motor with gear combination to make a jig to lift-up 2 tons. What is your recommendation? Do I need to get right matching of gear combination? If yes please help me to calculate the correct data. Thanks. Jemes
What does it mean of the gear ratio of a DC motor is 120:1. What does 120 and 1 stand for? I understand they are the ratio between the no of teeth, but which gears?
@Dragos The numbers represent the gear ratio, in this case the gears act to reduce the speed by a factor of 120 and increase the torque by a factor of 120. There are likely many gears needed to create this ratio.
@Jemes Two tons is essentially the weight of a normal car - you need a powerful winch system for that with very heavy duty gears. The speed will be very slow and the current will likely be very high. For more help, please create a new topic on the RobotShop Forum, but based on the question, the application does not sound very robotic.
i have a 6 6v dc motor, what battery should i use?
looking for a 12 v dc motor to raise my milling machine head which is rack and pinion geared and raised by a hand crank. I would like to couple the shaft with a motor . What should I look for ?? . The milling head weighs 220 lbs,
@Mave The choice of battery depends on the application, as well as the motor, and how long you want the robot to last between charges. Check the maximum continuous current per motor (amps) and then multiply by six to get the discharge current for the battery pack. The capacity relates to how long the robot will last between charges.
@CONRAD That’s a very specific application and it sounds like you need an industrial electric winch motor. We do not have anything specific for that application - you’d need to tell us the torque and RPM needed (might try through experimentation).
if 30A is rated value of current give on data plate of DC motor. What does it specify line current or armature current
im trying to look for a motor for my project where i will be designing a aid device to hoist patients from their bed, motor should be able to lift 100 kg, expect the radius of the spindle for winding to be around 3 cm, does that mean that the motor specification i need to look for must be at least able to have a torque of 300 Nm ? the rpm of the motor should be low, choosing a stepper motor with the rating. Am i on the right track ? or are there other option that are cheaper or more efficient ?
@Mike You would need 300Kg-cm, or 30Nm. Since the weight can have a bit of downward acceleration, you should plan for 40Nm. If the overall travel distance is low, you might just want to use a linear actuator: https://www.robotshop.com/en/actuators.html
Hello,
I have the following motor specifications:
Resistance = 0.016ohm
Max Current = 50A
Max Voltage = 15V
Power = 820W
Kv = 1050 RPM/V
Kt = 0.009095
Using these I need to determine the operating current in order to get the torque of the motor.
Is there an analytical method or do I have to resort to experimental methods.
Thank you