Q: Running in reverse
A: With motors - when they run in reverse - you simply need to switch the leads - that will account for why the motors are running in reverse because that voltage going to the motor has polarity.
Q: this does not work. with polarity reversed, nothing happens at all when power is applied
A: May I ask - what power supply are you using to power this?
Q: The one I have is also running in reverse. I have switched the wires and nothing happened. We are using a power supply supplied by von duprin. Still running in reverse
A: The Von Duprin power supply will not power the Kawneer 133649 1686/1786 Manual Exit Part To MEL Motor
and you need the Kawneer power supply, which is the Kawneer 050419 NP1 POWER SUPPLY APPROVED FOR USE WITH KAWNEER 1686 MEL & 1786 MEL EXIT DEVICES - OPERATES UP TO 2 DEVICES
as seen here:
Click Here
Q: Motor spins in correct direction causing dogging of pushbar. However, there is no reverse action and panic device stays stuck in depressed state. Electrical or hardware problem? Should motor receive signal to reverse after a certain duration?
A: The power supply are you using with this device?
Q: We are using the Kawneer NP1 power supply
A: Thats the correct power supply. I would check the polarity.
Q: Would you please tell me the ohm value of the MEL?
A: Measuring the resistance of electronic circuits differs significantly from more familiar mechanisms like solenoid actuators. Typically, for solenoid actuators, people may consider coil resistance; however, with electronic circuits, the outcome varies based on the type and setting of the multimeter used.
If measuring resistance at the power input terminal of the board, you might expect readings between 10k to 100k ohms with a standard multimeter. However, these readings are not definitive, and deviations might be observed if the board is connected to the power supply or was recently powered off.
Its crucial to exercise caution: while measuring the power input terminal wont cause damage, other motor/sensor terminals should be avoided. The voltage applied by a meter on these terminals could potentially damage chips.
In light of these nuances, I advise against using a multimeter on the motor board for safety and accuracy. Realistically, not one that can be done in the field without a high likelihood of damaging the board. That is unless they were willing to lug an oscilloscope into the field and had the hands of a surgeon.
Q: A client lubricated the worm screw on the MEL. I indicated this was "no bueno." Please confirm there is no need to lubricate the worm screw.
A: In 99.999999% of situations it is not needed. The lubricant we add at the factory is rated for airplane props and will last for many years. However in situations where the uninformed try to spray WD-40 or other solvents on the worm screw they may need to add more lubricant in which cases we recommend using a spray silicon lubricant. That said adding additional lubricant won’t hurt anything other than the possibility of attracting more dirt into the worm screw.
Q: When card is swiped, no action from motor. I was working fine for 1 year.
A: Have you checked voltage at the power supply?
Q: Thanks for your help on this project. We have diagnosed the power supply, the access control, we have isolated the door for this motor, we have removed the motor from the bar and tried to power the motor as well. It only works one way. Unfortunately, all the other doors motors will operate in dual positions. (Lock) (unlock) attached, videos of operation failure.
Video 1 is here:
Click Here
Video 2 is here:
Click Here
A: The most likely reason is that they are trying to use the incorrect power supply or they are interrupting power to the unit in order to try to activate it.
When these units are initially powered on, they run the motors out all the way to ensure the the motor is in the 0 position. If they are powering it on and then taking power away, the way many systems work, than it will only every drive the motor out. You need to have an NP-1A power supply and the MEL needs to have an uninterrupted connection to it.
As a second look I just rewatched your video you sent over. They are definitely cutting power. If you notice on the video where they are activating the device the green light is off and then when he says “hit it” the light comes on and the device tries to zero. This is the correct behavior.
In the video where he is holding the device up I can see the lights clearly, the first light, the power light is on and flashing (correct behavior) but the middle light is not flashing. This indicates that there is no communication with and NP-1 power supply.
My conclusion is they are trying to use an improper power supply. They must use the NP-1A as seen here:
Click Here
Q: Will this motor retract panic device and hold open for a 10hour business day when using access control and not hurt the motor?
A: Electric dogging. No problem to use the Kawneer 133649 1686/1786 Manual Exit Part To MEL Motor as part of a system to accomplish electric dogging.