- This topic has 8 replies, 4 voices, and was last updated 8 years ago by
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Liberator and Hinge
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I have an old Liberator with a hinge which is starting to show it age.
Its a model fitted with the CSE 126 + CSE 125 pcbs – same setup as Min.200 hinge setup to all intents and purposes.
My question is are all comms sent via the aux connections? the one I’m concerned with being the hinge down enable.
Whats happening is that the hinge folds down with a down call and then the lift then moves down the stairs (as it should) until it reaches the halfway parking charge point, where it sometimes stops again, but every now and then it will just drive all the way down to the bottom stop as it should do.
Generally if it stops at the halfway charger then releasing and pressing the down call will allow to lift to continue its travel to the end stop – customer says it stops at the halfway point and won’t move on, I have never been able to recreate this and my suspicion is that she’s just being impatient waiting for the enable signal to be received as it does take a few seconds.
All the heights for lollipops are spot on, this is an issue of the hinge enable not being communicated to the lift, so I presume everything is communicated through the aux connection unless someone knows better? -
Yep all done via comms line…….. Same as old style minivator, meditek erc….
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Check both pickups and bus strips are clean. I have often seen ring crimps on the underside of the busstrips being loose (Switch off charger when tightening) and check purple wire on carriage pick ups hasn’t broken with fatigue.
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Thanks Robbie I’d checked the basics – I’ve had quite a bit of experience with these over the years, I used to work on the AC Stratus and then the DC version with solenoids under the charge plates!
This is just a once in a while thing where the lift stops alsmost as if to double check the hinge is down.
The main areas that I will now explore are the possibility that the hinge switch has become resistive and is dropping a small voltage across it meaning it is below threshhold for the hinge enable signal. And Aux output from the PCB is 10.5 – 11.5 volts so I’m wiondering whether the board has a 12volt regulator which is failing.
Time to try and source some replacement PCB’s I think. -
You have a earth problem,the simple fix is to get some braid and fix it to the skate through one of the skate guard holes that hits the charge plate on the back at the same time as the two fingers
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Steve did you used to work with Micky Blackburn at Leicester?
I’d forgotten liberator had come out with those retro fit braid kits, there was an extra bracket that goes on with them. They were issued for the hinge not operating at all though iirc. -
Hello Mr Wi…..
Good to see you, and don’t forget, waiting to hear from you soon… -
quote Kevin:Steve did you used to work with Micky Blackburn at Leicester?
I’d forgotten liberator had come out with those retro fit braid kits, there was an extra bracket that goes on with them. They were issued for the hinge not operating at all though iirc.I did Kevin i was the founder and yep Micky did work with us for a couple of years.
You don’t need the bracket come straight off the skate guards it gives it a direct earth and will cure your problems without a new board. -
Thanks steve, I’ll make something up to fit.
I used to work for a firm in Devon who used to cover the calls for the south west. One of the lads I used to work with once told me he dreaded phoning you for tech support because ” Steve always asks me to use a meter and take readings”….. he didn’t stay long on the firm!
Did you move across to Liberator and redesign the lift?
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