Feed rollers stopping

[dig-dug-dan]

1 hour ago, s o c said:

Maybe limit switch on the stop bar has corrosion or bad connection.

You could by pass to see if it stays running (obviously, don’t operate without stop bar working.).

another possibility is emergency stop button , check for corrosion, bad connections.

this can also be bypassed.

 

 

Actually I noticed the stop bar was not activating. So this could indeed be the issue!

[s o c]

1 hour ago, dig-dug-dan said:

Actually I noticed the stop bar was not activating. So this could indeed be the issue!

If you mean the stop bar isn’t stopping the rollers, better get sorted.

someone may have already bypassed to keep chipper going.

Wisest thing to do is get Dan to give entire machine a good checking over.

 

 

[dig-dug-dan]

1 minute ago, s o c said:

If you mean the stop bar isn’t stopping the rollers, better get sorted.

someone may have already bypassed to keep chipper going.

Wisest thing to do is get Dan to give entire machine a good checking over.

 

 

Agreed. It's on his list, chipper not being used until its sorted!

[GA Groundcare]

Don't think it will be stop bar switch as the rollers wouldn't restart on their own.

 

To activate the feed rollers you need 12v to the forward hirschmann plug. Check to see whether you are getting a 'smooth' 12v at the forward side, or if you are getting it intermittently which matches the stop start of your rollers.

 

If the 12v feed is continuous it could well be the solenoid coil playing up. If you are able to remove it from the valve block shaft swap it over with the reverse side.

 

You can also swap the forward & reverse hirschmann plugs over, operate the forward switch to make the rollers go backwards. And the reverse switch to make the rollers go forwards. See if you can get the problem to move.

 

Continuity test the switches up in the control box, could well be the forward switch inside not latching.  

 

[GA Groundcare]

Depending what stress control system that machine is running you might be able to bypass the stress control by looping in the two bullet connector wires. If the feed rollers work ok with it plugged in just that the stress control doesn't then function it'll be an issue with either the stress control box or speed sensor. If it has the old grey type stress box with the built in speed sensor the control box is obsolete. However the speed sensor can be removed from the control box and is still obtainable from RS Supplies.

 

There is a conversion kit available from TW to upgrade the old control box to a later one with separate speed sensor. TimberWolf are always pretty helpful on the phone.

Edited February 13, 2023 by GA Groundcare

[dig-dug-dan]

1 hour ago, GA Groundcare said:

Depending what stress control system that machine is running you might be able to bypass the stress control by looping in the two bullet connector wires. If the feed rollers work ok with it plugged in just that the stress control doesn't then function it'll be an issue with either the stress control box or speed sensor. If it has the old grey type stress box with the built in speed sensor the control box is obsolete. However the speed sensor can be removed from the control box and is still obtainable from RS Supplies.

 

There is a conversion kit available from TW to upgrade the old control box to a later one with separate speed sensor. TimberWolf are always pretty helpful on the phone.

It does indeed have the old grey box, with a sensor pointing at the flywheel teeth. It has a green led on it.

I assumed this worked ok, as when the rollers do work, the no stress kicks in fine.

Be interested to see if timberwolf can upgrade but bart chipper doctor is coming out tomorrow so fingers crossed

Edited February 13, 2023 by dig-dug-dan