Fault Q

[Ross1]

Hi guys, my question is regarding a vertical baler (paper crusher). The initial problem was that when pressing the start button to begin the crushing process nothing was happening. The company who supplied the machine 10 years ago will not send me the schematics. After checking the obvious, I started tracing wires, i then discovered a pressure switch on the back of the machine which even though the ram was under no pressure, was in a normally open state. I then bypassed the switch to find that the problem seemed to be fixed. I obviously had to stop the crusher manually with the latching stop. I then realised that the limit switch on the ram was not stopping the downward movement, which it surely must, even though I have bridged the pressure switch.

Any idea's guys. The machine in question is a single phase VB 56 Baler supplied by a company called Pakawaste.

Thanks

 

[Farmelectrics]

Sometimes works out cheaper to get the company out that owns the machine

 

[iamelectric]

get someone who knows what they are doing , these machines have sensors everywhere , i wouldnt recomend bypassing any , or someone will end up hurt

 

[Engineer54]

Hi guys, my question is regarding a vertical baler (paper crusher). The initial problem was that when pressing the start button to begin the crushing process nothing was happening. The company who supplied the machine 10 years ago will not send me the schematics. After checking the obvious, I started tracing wires, i then discovered a pressure switch on the back of the machine which even though the ram was under no pressure, was in a normally open state. I then bypassed the switch to find that the problem seemed to be fixed. I obviously had to stop the crusher manually with the latching stop. I then realised that the limit switch on the ram was not stopping the downward movement, which it surely must, even though I have bridged the pressure switch.

Any idea's guys. The machine in question is a single phase VB 56 Baler supplied by a company called Pakawaste.

Thanks

Are you working for the company that owns this baling machine, or a electrician/contractor that has been asked by the company to fix this machine?? If you work for the owner of this machine, then it is up to them to insist on a schematic drawing being provided by the manufacturers. One should have been provided at point of sale/delivery. Has that copy been lost/mislaid??


As for you by-passing switches/sensors, not exactly very intelligent thing to do is it!! Just wait to Netblindpaul see's this thread, you'll be in for a right ole rollicking!! lol!!

 

[Knobhead]

Hi guys, my question is regarding a vertical baler (paper crusher). The initial problem was that when pressing the start button to begin the crushing process nothing was happening. The company who supplied the machine 10 years ago will not send me the schematics. After checking the obvious, I started tracing wires, i then discovered a pressure switch on the back of the machine which even though the ram was under no pressure, was in a normally open state. I then bypassed the switch to find that the problem seemed to be fixed. I obviously had to stop the crusher manually with the latching stop. I then realised that the limit switch on the ram was not stopping the downward movement, which it surely must, even though I have bridged the pressure switch.

Any idea's guys. The machine in question is a single phase VB 56 Baler supplied by a company called Pakawaste.

Thanks

I hope you or you’re company are insured. Though incompetence / negligence may nullify it.

Isolate the machine until a new pressure switch is fitted and tested.

 

[Knobhead]

They have a web site, have you looked on it?

 

[Aindowsimon]

Surely he only bypassed pressure switch temporarily to help locate the fault

 

[Darkwood]

Surely he only bypassed pressure switch temporarily to help locate the fault

The OP has made alot of assumptions here and il have to agree with Tony here (i owe him that anyway), if you suspect a part then replace it with a identical or alternative part before trying the machine ..... unless you are fully familiar with the wiring and operation sequence and consequences of bypassing functional parts then you shouldn't be bypassing anything. Is it to be assume the pressure switch is at fault and maybe its function is N/O as oppose to N/C in said position...... the machine has stopped working but maybe as a fail safe and thus unless you are fully competent with the operation and machine design you should never try resolve issues by bypassing functions as you may be wrong and you may damage the machine or injure the operator or yourself if not worse.

A friend of mine has just been de-gloved as he was the mechanical engineer working with an electrician on a machine where the electrician wasn't aware of the full function and sequence of the machine, he accidently set the machine running while in the control panel while the engineer was inside the machine fencing....as engineers we have to bypass safety gates to do our job but someone didn't know how to do his!