Project Battle

I think this can be done with one Teco SG2-12HR-D programmable relay (US$ 99) with a NO pushbutton to initiate the cycle. The relay is approx 3" x 3.6" x 2.5"

Note: When you come (eventually ) to testing and using this thing, the Linak site states that the LA-30 is rated for a duty cycle of "Max. 10 % or 6 min/hour at continuous use".

http://www.google.co.uk/search?q=adjustable+power+timers&sourceid=ie7&rls=com.microsoft:en-gb:IE-SearchBox&ie=&oe=&rlz=1I7GGLT_en&redir_esc=&ei=R9WbTM24KdjNjAf4rMjpCQ

555

http://www.kpsec.freeuk.com/555timer.htm

repeating timer

http://www.google.co.uk/search?q=repeating+timer&sourceid=ie7&rls=com.microsoft:en-gb:IE-SearchBox&ie=&oe=&rlz=1I7GGLT_en&redir_esc=&ei=1NWbTKmVCI-SjAfh34H1CQ

repeating timer

http://www.google.co.uk/search?q=3+second+timer&sourceid=ie7&rls=com.microsoft:en-gb:IE-SearchBox&ie=&oe=&rlz=1I7GGLT_en&redir_esc=&ei=BNabTO6eHcKSjAelyej-DA

2 second timer

http://www.google.co.uk/search?q=2+second+delay+circuit&sourceid=ie7&rls=com.microsoft:en-gb:IE-SearchBox&ie=&oe=&rlz=1I7GGLT_en&redir_esc=&ei=i9abTPb6O9C6jAeb6eyRDQ

HI Dear friend it is very easy ,just mail me what u did & what u want to make .give me required load and speed i will design and mail u immediate............ with worm regards amit rathod, my e-mail : maruinj@indiatimes.com

http://www.google.co.uk/search?q=equipment+for+disabled+persons&hl=en&tbo=1&rls=com.microsoft:en-gb:IE-SearchBox&rlz=1I7GGLT_en&output=search&source=lnt&tbs=cpk:1&sa=X&ei=JzioTJy6HMjKjAeK5KG8DA&ved=0CBYQpwU

sub minature acuators

http://www.google.co.uk/search?q=sub+minature+acutators&sourceid=ie7&rls=com.microsoft:en-gb:IE-SearchBox&ie=&oe=&rlz=1I7GGLT_en&redir_esc=&ei=rzioTKWdKIqQjAeMyKTuDA

The actuator will move a plate to start the downward cycle. Using the max power available and at it's fastest speed under load. Then when it completes it downward extension it will then pause and then somehow have the power reversed so that the actuator will then be able to retracted at it's fastest speed with out any load until it reaches it's fully closed position. I would like to begin the entire cycle by only pushing one switch, or to have some kind of switch that is activated by a door being closed.Then once the entire cycle has finished the power will then be cut off. All the links that have been sent I have already printed out and reviewed. But my problem is that they rely on switches be them toggle, or limit must be physically pushed. I would like to use rely and a timing unit if at all possible to achieve the desired outcome and not have to rely on manual switches or any kind of limit switches. I have a timer unit that gives my my desire pause and I also have a DPDT 24vdc relay and at the present time I can start the downward cycle but I am having problems when get to the pause and then reversing of the power. I am no pro at electronics and am learning as I go. Once I thank you all for you helpful suggestions and hope to get more in an effort to finish up this project. Call me out of my league or even stupid, but all I am asking for is a little help and understanding. Thanks again.

Ok good description one last question how much presure has the actuator to excert, lift or push

1lb 10 lbs etc if i was you when you answer add say 10/20% to be on the safe side

so as not to load acutator too much and give it a good working capacity

for my benefit so i dont have to keep searching

http://www.linak.com/corporate/pdf/ENGLISH/DATA%20SHEET/Linear%20Actuator_LA22_Data%20Sheet_Eng.pdf

with the speed of 28 mm a/second

The entire unit, of the actuator, and circuit board need to fit into a enclosure of 4 inches by 3 inches.

The force of the unit is measure at 400n. ( Whats that in old money ?)

The actuator will not fit within the 4x3 area that is where I am hoping to putting the controller unit. The complete measurements will be 4x3x14. Yes the actuator needes the full 24vdc for a complete cycle of up and down

http://www.google.co.uk/search?q=DPDT+24vdc&sourceid=ie7&rls=com.microsoft:en-gb:IE-SearchBox&ie=&oe=&rlz=1I7GGLT_en&redir_esc=&ei=ipyoTI6BItS5jAfz09HvDA

http://www.farnell.com/datasheets/40309.pdf

the specs for this relay state resivitive load, any one know what the inductive load may be on the acutator ?

you will also need inductive quenching circuit to avoid damage to electronics, and reduce EMC problems. On fork lift trucks they do this by using Diodes across the wires forming a short for EMF but this will not work on DC so poss use a transient suppresor

SPECIFICATIONS

15A (2C), 10A (4C) COMPACT

POWER RELAYS WITH

HIGH SENSITIVITY

SP RELAYS

22

.866

50 a

1.969

mm inch

a

2C 25.6 1.008

4C 36.8 1.449

FEATURES

• High Vibration/Shock Resistance

Vibration resistance: 18 G, amplitude 3 mm (10 to 55 Hz)

Shock resistance: 40 G (11 ms)

• Latching types available

• High Sensitivity in Small Size 150 mW pick-up, 300 mW

nominal operating power

• Wide Switching Range

From 1 mA to 15 A (2C) and 10 A (4C)

Contacts

Coil (polarized) at 20

°C 68°F

Characteristics (at 25

°C 77°F 50% Relative humidity)

#1 This value can change due to the switching frequency, environmental conditions,

and desired reliability level, therefore it is recommended to check this with the

actual load.

Remarks

* Specifications will vary with foreign standards certification ratings.

*1 Measurement at same location as "Initial breakdown voltage" section

*2 Detection current: 10 mA

*3 Excluding contact bounce time

*4 Half-wave pulse of sine wave: 11ms; detection time: 10μs

*5 Half-wave pulse of sine wave: 6ms

*6 Detection time: 10μs

*7 Refer to 6. Conditions for operation, transport and storage mentioned in

AMBIENT ENVIRONMENT (p. 19, Relay Technical Information).

Arrangement 2 Form C, 4 Form C

Initial contact resistance, max.

(By voltage drop 6 V DC 1 A) 30 mΩ

Initial contact pressure 2C: Approx. 0.392 N (40 g 1.41 oz )

4C: Approx. 0.196 N (20 g 0.71 oz )

Contact material

Stationary contact:

Au flashed AgSnO2 type

Movable contact: AgSnO2 type

Rating

(resistive

load)

Nominal switching capacity

2C: 15 A 250 V AC

10 A 30 V DC

4C: 10 A 250 V AC

10 A 30 V DC

Max. switching power 2C: 3,750 VA, 300 W

4C: 2,500 VA, 300 W

Max. switching voltage 2C, 4C: 250 V AC, 30 V DC

Max. switching current 2C: 15 A (AC) 10 A (DC), 4C: 10 A

Min. switching capacity#1 100 mA, 5 V DC

Expected

life (min.

operations)

Mechanical (at 180 cpm) 5 × 107

Electrical

(at 20 cpm)

(resistive

load)

2C

15 A 250 V AC 105

10 A 30 V DC 105

4C

10 A 250 V AC 105

10 A 30 V DC 105

Single side stable Nominal operating power 300 mW

Latching

Minimum set and reset power 150 mW

Nominal set and reset power 300 mW

Max. operating speed (at rated load) 20 cpm

Initial insulation resistance*1 1,000 MΩ at 500 V DC

Initial

breakdown

voltage*2

Between open contacts 1,500 Vrms

Between contact sets 3,000 Vrms

Between contact and coil 3,000 Vrms

Operate time*3(at nominal voltage) Max. 30 ms (Approx. 25 ms)

Release time(without diode)*3

(at nominal voltage) Max. 20 ms (Approx. 15 ms)

Temperature rise

(at nominal voltage)

Max. 40°C with nominal coil voltage

and at nominal switching capacity

Shock resistance

Functional*4 Min. 392 m/s2 {40 G}

Destructive*5 Min. 980 m/s2 {100 G}

Vibration resistance

Functional*6 176.4 m/s2 {18 G}, 10 to 55 Hz at

double amplitude of 3 mm

Destructive 176.4 m/s2 {18 G}, 10 to 55 Hz at

double amplitude of 3 mm

Conditions for operation,

transport and storage*7

(Not freezing and condensing

at low temperature)

Ambient temp. –50°C to +60°C

–58°F to +140°F

Humidity 5 to 85% R.H.

Unit weight 2C: 50 g 1.76 oz ; 4C: 65 g 2.29 oz

TYPICAL

APPLICATIONS

NC machines, remote

control panels,

sophisticated business

equipment.

remote controlled locks may use the timer required

http://www.google.co.uk/search?q=remote+controlled+lock&sourceid=ie7&rls=com.microsoft:en-gb:IE-SearchBox&ie=&oe=&rlz=1I7GGLT_en&redir_esc=&ei=_p-oTI_hIsK5jAeW6cy_DA

taken from my last link

http://www.youtube.com/watch?v=PRdMuoIr7gQ

also you may want to look at power windows and power locks on cars they are powerfull and auto stop

http://www.howstuffworks.com/power-door-lock.htm

http://auto.howstuffworks.com/power-window.htm

http://www.google.co.uk/search?q=car+door+lock+servos&sourceid=ie7&rls=com.microsoft:en-gb:IE-SearchBox&ie=&oe=&rlz=1I7GGLT_en&redir_esc=&ei=fr6oTNmmI9WRjAeTva3GDA

http://www.google.co.uk/search?q=electric+car+door+locks&sourceid=ie7&rls=com.microsoft:en-gb:IE-SearchBox&ie=&oe=&rlz=1I7GGLT_en&redir_esc=&ei=5b6oTOjJBZbKjAfL2fjVDA

http://www.a1electric.com/

http://www.a1electric.com/catalog.htm

http://www.a1electric.com/catalog/cat_key.htm

take a look at this one

http://www.a1electric.com/cable_locks.htm

By the way dont forget to answer the load required by the servo question in one of my other links.

you can add a couple of timers for the up & down stroke & get close on positioning

the circuit will be the same as one with limit switches, the accuracy being determined by the actuator & resolution [smallest usable increment] of the timers

there can be problems with using timers, when the actuator gets to the end of the stroke, before the timer times out & you have a locked rotor situation, blowing a fuse or tripping a breaker.

creative placement of limit or proximity switches, can overcome any limitation of these kinds of setups

it all depends on how much accuracy is required

which is yet another specification that has been omitted

Accuracy is not that important, I am more or less going to let the unit just go thru its own motions if you will.

and the reply to my question about load ??

problem is budget wise limit switches are going to be much cheaper

search for 24vdc time delays & the cheapest I see are $17 bucks & require an external resistor. You're gonna be hard pressed to beat limit switches, which can be mounted on the linkage or actuator

you can do something else with strictly rotary motion & a bell crank arrangement