Gate opener to lift a trap door rather than swing a gate

We actually get asked this quite often to use an automatic gate opener for lifting rather than swinging and it is just not possible unless the door being lifted is counter balanced. This is because of the control board of the gate opener. The motor/actuator when being controlled by the gate opener control board will not be allowed to push or pull with significant force and will react to changing forces because of the obstruction sensing built in. All gate openers have obstruction sensing which means when they meet resistance they will stop and reverse for safety purposes. They are all built to be pulling a gate that swings level and with very little amounts of force. The larger motors are just deigned to be able to do heavier duty cycles, not exert more force. They are all regulated through the control board to the exact same levels of force because this is dictated by UL 325 code. The best way to describe this it no manufacturer of a gate opener will allow their opener to knock over and hurt a child. There is no way to distinguish gravity, wind, or any other resistance factor from the resistance of the gate coming in contact with a child. Therefore all gate openers, no matter how strong the motors are, will stop prior to hurting a child and subsequently when there is wind resistance on a gate or gravity resistance on a lifting action it will obstruct. So in this case the fight of the door lifting against gravity would set off the obstruction sensing. This could happen in either direction as well. Lifting of course you are pulling against gravity if the door is not counter balanced. And letting the door down gravity will be pulling it along, which if something pushes on the gate to make it close quicker this could also cause an obstruction. (we see this in swing gates if there is ever a whipping action from a gate moving too fast it will set of the obstruction because of the whipping pull on the gate ahead of the control of the opener)

What we mean by counterbalancing is the same idea as a garage door. In garage doors the door itself must have springs at the top to counter balance it in order to automate it. If your counter balance springs are correct you should be able to lift your garage door half way up manually and let go. It should stay where it is and not fall back down. If this is not so the garage door would not be able to be automated by an opener. This would be the same with a door being lifted vertically by a gate opener. You should be able to lift the hinged door half way open and let go. The door should not move or fall back closed. If you can achieve this then you can add an actuator to the door and it should be the same as swinging on a level plane.
One potential option is using a barrier operator with the correct counter balancing. This is a barrier operator. It has an arm that lifts rather than swings. These operators have internal counterbalancing using adjustable springs to control the weight of the arm. If you attached the barrier to the door you could potentially adjust the springs of the barrier operator to counter balance the lifting hinged door.
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Testing a solenoid automatic gate lock that is using a lock control board

This would include the models Mighty Mule FM143, GTO/PRO FM144, GateCrafters GCLOCK, and Estate Swing ESGL2.0

If you have a multi-meter you can find where if your issue is in the gate opener triggering the gate lock, the gate lock control board, or in the gate lock itself.

1. Take the white (red in the case of GTO/PRO or Mighty Mule) and black wires directly from the gate lock and touch them to the battery of the gate opener. Does the gate lock release?
If it does, lock is fine; go to 2
2. Set your multi-meter to DC voltage. Put the positive lead on terminal 1 of the lock control board (leaving the white wire in there that should be connected to the gate opener board or motor harness, you can press the multi-meter lead on the head of the terminal screw for a reading), put the negative lead on the negative terminal of the battery. Activate the gate opener. Do you get a momentary voltage reading?
If you do your trigger from the board is fine, go to 3
3. Leave the multi-meter set to DC and put the positive lead on terminal 4 and the negative lead on terminal 3 of the gate lock control board. Active the gate opener. Do you get a momentary voltage reading?
If you do you lock control board is fine.
If any of the 3 above fail you know your issue. If all of the 3 above work fine then it is the gate lock jamming on the receiver bracket pin. First, to confirm, try removing the round pin that is in the C shape receiver bracket and activate your gate opener. If you hear the gate lock release then it is confirmed. The best way to solve this issue is to have the gate close harder against the receiver bracket by adjusting your limit switch or programmed closed stopping point to allow the gate opener to close slightly further. If you have a dual gate it is best to have a physical stop that holds the secondary gate leaf in place that has the receiving bracket. If that is not there the gate leafs have slight flexibility in their closed position alignment which will cause this binding of the gate lock on  the receiving pin when trying to release.
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GSM Gate Opener Receiver Common Programming Tip

A common gate opener technical call we get is in regard to the GSM cellular receiver opening the gate at random times. The reason the gate opens via the cell receiver at random times is because in default, any number that calls the GSM receiver will be able to activate the gate opener. Once you set up your admin phone and white list of authorized gate users you can turn off this function. This will prevent spam calls from opening the gate.

The following sequences of text messages will be sent to the GSM receiver.
Send the following text message first, all letters are capital letters:
NOTE: in the above text message the xxxxxxxxxx with your cell phone number you are using for sending the text messages from. This is the cell phone number of the phone you use as your cell phone, not the gsm number. For example if this is your primary cell phone is 530-233-0943  and you will be sending the texts from this phone for programming the text you send the GSM receiver from that phone will be: #PWD123456#TEL1=5302330943
Send the following text message next. You will repeatedly send this text message for all the numbers of the people you want to be able to open your gate. Each new person you will change the phone number in the text message and the slot number:
So for example if you were making it so our office could call your gate and open it, text the GSM  #PWD123456#WHL01=8139207259
(our office phone is 813-920-7259)
Then if you wanted our other office number to open the gate text it using the second number and slot 02 instead of 01
Then if you wanted to add a third number you would use slot 03 (WHL03) and that number. It is best to write down who is in each slot to keep track. You can add up to 64 numbers.
The last thing you are going to text the GSM receiver is the access mode lock out. This is what is going to prevent random phone calls from opening your gate. Send the following text:
You are now done sending it texts and only people who are on the white list and your phone, the administrator phone, will be able to activate the gsm receiver to open the gate. Random phone calls from unknown numbers will be ignored and the gate will not open.
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