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james roffey

Rotary problem !
« on: November 05, 2012, 03:06:04 pm »
I have a rotary machine that packed upabout two months ago, it went in to be repaired, the diagnosis from the engineer was a new capacitor or something like that ! this was replaced and when i went to collect it the guy plugged it in and demonstrated the drive plate turning. i paid him and took it home.
It has sat at home since and not been used, i don't do a lot of bonnet cleaning.
Today i had a low profile carpet tiled floor in a church hall that i do from time to time, i did all the prep work including removing a hundred plus chairs, then when i was ready plugged the machine in placed the drive plate on and sat it on the pad. The drive plate went the wrong way round !!
It normally goes clockwise and when this happens it locks the drive plate on the machine, with the weight of the machine on it it wont turn at all, when tilted back off the floor it turns the wrong way ???
I phoned the engineer straight away, explaining what was wrong and his first comment was "it sounds expensive" i said that this was the first time i had switched the thing on since collecting it from him after he "repaired" it how on earth can it turn the other way of its own accord, it sound to me he has put it back together incorrectly in some way.
I know nothing about how these things work but something does not seem right, does anyone on here understand how these work and could he have caused this, as it does seem to be a bit of a coincidence that the first time i use it this happens, i will have to go back and do that job again but have wasted most of the day, i had to return the machine to the engineer, plus time wasted on the job. lets hope i get it back for next Monday when i am going back. 

Mike Halliday

  • Posts: 11578
Re: Rotary problem !
« Reply #1 on: November 05, 2012, 03:20:56 pm »
I have just fitted a new motor to a pump, to make it turn clockwise or anticlockwise was just a switching  of 2 wires. I would guess your machine is the same, the fact that it turns shows nothing is mechanically wrong it's just a reversal of polarity
Mike Halliday.  www.henryhalliday.co.uk

james roffey

Re: Rotary problem !
« Reply #2 on: November 05, 2012, 03:53:49 pm »
Mike
That was my first thought that either a belt had been put on wrong or something else that the engineer did while reconnecting the thing, i was not happy, especially when he said that it sounded expensive, i could not believe that he had no doubt that he may have caused this, that would be the obvious reason surely, why else would something  like that suddenly turn in a direction that it was not designed to do.
I await his call to tell me what has caused this. i just wanted to be able to have a better understanding so i can argue my case better if he suggests that it is just wear and tear.

Mike Halliday

  • Posts: 11578
Re: Rotary problem !
« Reply #3 on: November 05, 2012, 04:22:08 pm »
on the cimex machine the on/off switch can turn either way to make the brushes turn clockwise or anticlockwise, this show that the motor can turn either way, I bet its like i said he has just connected a wire the wrong way.

as it says here its easy to change the direction of a single phase motor

http://www.ehow.co.uk/how_6005849_reverse-single-phase-ac-motor.html
Mike Halliday.  www.henryhalliday.co.uk

Paul Redden Countryfresh

  • Posts: 773
Re: Rotary problem !
« Reply #4 on: November 05, 2012, 05:40:02 pm »
Sharp intake of breath...."Sounds like your big end's gone"  :o
"So basically its a big vax!"

Jim_77

Re: Rotary problem !
« Reply #5 on: November 05, 2012, 06:34:25 pm »
Was it the flux capacitor? ;)

james roffey

Re: Rotary problem !
« Reply #6 on: November 05, 2012, 06:40:43 pm »
Jim
I am going to use it to travel back in time to last month, to where i said "that looks like it's working fine how much do i owe you"

markpowell

  • Posts: 2279
Re: Rotary problem !
« Reply #7 on: November 05, 2012, 07:32:31 pm »
The wires are on the motor the wrong way round mate.
Mark

Paul Moss

  • Posts: 2296
Re: Rotary problem !
« Reply #8 on: November 05, 2012, 07:49:27 pm »
All these machines have a thermionic emmission valve that if wired one way makes it go clock wise and wired backwards makes it go.... Yes anti clock wise ;D

james roffey

Re: Rotary problem !
« Reply #9 on: November 05, 2012, 08:50:56 pm »
So if he says "It's going to cost this much" can i say with confidence that you must have wired it incorrectly because its not meant to turn that way, which it isn't, and it
was not doing this before you worked on it so you are responsible, bloody angry as it;s cost me a days work.

Paul Moss

  • Posts: 2296
Re: Rotary problem !
« Reply #10 on: November 05, 2012, 08:53:33 pm »
James undo the handle and turn it the other way around, then fasten it back up and it will spin the right way  :)

james roffey

Re: Rotary problem !
« Reply #11 on: November 05, 2012, 09:06:29 pm »
Paul
That's where the forums are a mine of great advice, years of wisdom and experience all come together to solve the problem, but i already worked out that if i walked backwards using it, problem solved ;D 

Paul Moss

  • Posts: 2296
Re: Rotary problem !
« Reply #12 on: November 05, 2012, 09:18:16 pm »
 ;D

Jamie Pearson

  • Posts: 3407
Re: Rotary problem !
« Reply #13 on: November 05, 2012, 09:43:26 pm »
This has happened to me before.

I just swapped the wires around in the plug.

james roffey

Re: Rotary problem !
« Reply #14 on: November 07, 2012, 09:05:58 am »
Still not heard back from the engineer, must be a complicated one.   !

james roffey

Re: Rotary problem ! New
« Reply #15 on: November 08, 2012, 05:42:54 pm »
Phoned the engineer yesterday and again he said he was rushed off his feet doing someone else's machine that must be more urgent, i would have thought given the circumstances that the first time i use the machine after he has "repaired it" it does not work, he would have made it a priority, especially considering i lost a days work too. Anyway i phoned him again this evening "Thursday" and he still hasn't  even looked at it.
I told him that i was not happy as i have re-booked the job i was unable to do this Monday for next Monday and the way things were going i would be without the machine next Monday when i needed it.
He seemed unable to grasp that if he at least told me what was wrong with it then i would at least be in a position to make a decision as to whether i would be able to do the job next week, it's still sitting where i left it when i dropped it off Monday morning !
he also could not understand that i was upset that the first time i used the machine after collecting it from him not only would it not work but i lost a days work as well, then he compounds it by not bothering to even diagnose let alone fix the thing.
He just said what he said the previous times i have phoned him, i will look at it when i get a chance, i told him i cant run my business on his promises as i don't like letting my customers down. he told me to come and collect it as i was obviously unhappy, NO sh.. so i am collecting the thing tomorrow afternoon still broken.
Thankfully Doug Holloway has kindly offered to let me borrow a rotary that turns in the right direction, so i am able to earn a living.
So i am now looking for another local engineer to service and repair my equipment. RANT OVER