Hi,
i want to control a linear actuator with my arduino uno.
my equipment:
1 arduino uno
1 double relay
1 trafo meanwell lpv 60-36 (input 240v - output 36v)
the trafo is connected to the power socket with blue and brown cable. the other side (red/black cables of the trafo) are going directly to the double-relay:
red cable into first relay -> NC (first pin of relay)
black cable into second relay also NC.
the NC of each relay is also connected to the NO side of the other relay.
The black/red cables of the actuator are joined to the COM of each relay ...
At the first time i just want to set the engine in movement ...
setup:
digitalWrite(forwards, HIGH);
digitalWrite(backwards, HIGH);
pinMode(forwards, OUTPUT);//set relay as an output
pinMode(backwards, OUTPUT);//set relay as an output
and in loop - i set forward pin to LOW ...
the strange thing is, that first, the actuator is moving a little bit but suddenly it stopps and never run again until i permute the red/black cable of the actuator ...
what i'm doing wrong? can someone help me?
The Meanwell LPV 60-36 is a power supply, not a "trafo", and it has limited current capabilities (1.67 A).
Most linear actuators require much more current than that, in which case the power supply will shut down, blow a fuse, or worse.
Post a link to the web page product description or the data sheet of the exact actuator that you have.
Unfortunately, that page does not give the required technical details and does not seem to provide a data sheet for the actuator. Ask the seller for the data sheet.
You need to know the stall current (Motorstillstandstrom) at the operating voltage, likely to be 3 to 5 Amperes, possibly more. Buy a power supply that can provide that. Your motor driver will also need to be able to handle the stall current.
Edit: here is an example of the sort of motor specifications that you need.
This is the only picture i got from the actuator!
Hi,
Some translated info.
Further technical information: The actuator has two connections for the motor and two connections for the built-in reed sensor. Furthermore, the actuator has two fixed adjustable limit switches, These allow you to limit the maximum stroke of the actuator at will. Operation with only 2 wires is possible if it is sufficient that the actuator changes between the two positions defined by the limit switches. The extension and retraction is achieved by changing the polarity. The reed sensor delivers 76 pulses per 2.54 cm stroke. This allows the actuator, with a corresponding electronic control, to be used for precise control tasks. The actuator can be operated with 36V DC or 24V DC. At 24V DC, however, the full force of the actuator is no longer achieved.
OPs Image;
Tom..
can u show me one trafo which i can buy/use (amazon e.g)?
Buy a 36V, 7 Amp (more Amps, if possible) power supply. That is fairly certain to be sufficient.
why 7 amp? on the screenshot - 1.5A should be enought - isn't it?
1.5A should be enought - isn't it?
No, see reply #3.
The stall current is typically 5 to 10 times the running current and the power supply MUST be able to provide it.
