Welcome Guest! The IOSH forums are a free resource to both members and non-members. Login or register to use them

Postings made by forum users are personal opinions. IOSH is not responsible for the content or accuracy of any of the information contained in forum postings. Please carefully consider any advice you receive.

Notification

Icon
Error

Options
Go to last post Go to first unread
Taylor25880  
#1 Posted : 10 March 2011 16:12:46(UTC)
Rank: Forum user
Taylor25880

I am undertaking assessment of a piece of equipment which is 40 year old no e-stop or dead stop on moving equipment must the equipment have an estop and dead stop retro fitted
Jane Blunt  
#2 Posted : 10 March 2011 16:21:08(UTC)
Rank: Super forum user
Jane Blunt

Impossible to say without knowing what it does, how it does it and what is potentially dangerous about it.

Can you give us some more information?
Taylor25880  
#3 Posted : 10 March 2011 16:28:02(UTC)
Rank: Forum user
Taylor25880

It is a free standing industrial table router with a single spindle
currently it is not fitted with a guard around the router bit , nor does it have an estop , it does not have a dead stop feature if the machine power is switch off the router continues to run down under power and takes about 2-3 minutes to come to a complete stop , information dates it about 40 years old obviously I dont have access to any manufcturers info as they tell me none is available
paul.skyrme  
#4 Posted : 10 March 2011 20:45:49(UTC)
Rank: Super forum user
paul.skyrme

Taylor,
Is this an overhead router or a spindle moulder?
I don't recognise the term table router per se.
Please clarify the term dead stop, a dead stop in the machinery world is normally taken to mean a mechanical device or possibly electrical switch which limits the movement of an axis, to stop you for example winding a table off the end of a machine bed!
I suspect you are referring to a braking device to reduce the spindle run down time, such as but not restriced to a DC injection braking device.
From the information you have given so far, yes & yes IMHO.
IT must have an emergency stop device to comply with PUWER98.
IT also must have a braking device to bring the tooing to a standstill if contact with the tooling is possible during rundown.
IF the unit has a frequency converter drive on the spindle, e.g. overhead routers often have these, then you need to be more careful with your stop device.
Who is the machine manufacturer as I have lots of old wood machine info as this is the sort of thing I deal with almost daily.
PM if you wish. This is more an engineering issue than a H&S one as the machine if used in a business undertaking must comply with PUWER98.
paul mc  
#5 Posted : 10 March 2011 21:51:08(UTC)
Rank: Forum user
paul mc

just out of interest, fairly new to PUWER regs would i be right in assuming that even though the machinery is old it must conform ?
paul.skyrme  
#6 Posted : 10 March 2011 23:55:47(UTC)
Rank: Super forum user
paul.skyrme

paul mc,
Yes it must conform, it (PUWER)was a turning point in the concept of machine safety really, the old "grandfather rights" went out the window!
Especially with 98.
Taylor25880  
#7 Posted : 11 March 2011 09:29:05(UTC)
Rank: Forum user
Taylor25880

Paul

It is an over head single spindle router 40 years old I have contacted the manufacturer but they no longer have documents ,
the Manufacturer is COSMEC Model BREVETTATO POGG1BONSI
it is not fitted with a Estop or as you rightly say a breaking device on the spindle drive ,
John Taylor
stillp  
#8 Posted : 11 March 2011 14:06:02(UTC)
Rank: Forum user
stillp

Taylor,
You need a copy of the HSE ACOP "Safe use of woodworking machinery" (L114) and the HSE Information Sheet "PUWER 98:Retrofitting of braking to woodworking machines" (WIS38).
Usually braking needs to be fitted where there is a risk of contact with the rotating tool while it runs down unless the rundown time is less than 10 seconds or braking could damage the machine.
The last deadline for fitting braking was 5 December 2008.
paul.skyrme  
#9 Posted : 11 March 2011 20:59:57(UTC)
Rank: Super forum user
paul.skyrme

Peter,
You know you are correct! ;)

Taylor,
You need to understand the engineering of the machine a little more, however it must comply.
You will need to implement emergency stops in compliance with PUWER98, L114 & WIS38 & L22 are your friend!

You may have a rotary frequency converter on the machine which will make the implementation of the simple basic braking described in the HSE documentation difficult to fit.

This can be overcome and the cost is not prohibitive, but you do need an engineer who understands the systems in use and the products on the market.

The forum prohibits open advertising and commercial based responses.
martin1  
#10 Posted : 14 March 2011 14:37:18(UTC)
Rank: Super forum user
martin1

Can someone help me understand difference between a simple stop button and an emergency stop button.

I have a small bench grinder with a stop button ( or rather switch ) to the front of the machine but no emergency button. Others on this site have a emergency button fitted at floor level so you can stop machine with feet.
paul.skyrme  
#11 Posted : 14 March 2011 16:24:38(UTC)
Rank: Super forum user
paul.skyrme

Martin1,
An emergency stop button must be red, mushroom headed, latching in the "off" position and mounted on a yellow background.
It must act on the control system of the machine by interrupting the supply to the machine no volt release starter (contactor, dol starter, star delta starter - depending on what type you have and how you know these devices)
All machines to comply with the HSE ACoP on PUWER98 require no volt release and an emergency stop.
If the switch is a stay put device and if you switch the machine on, interrupt the electrical supply elsewhere - safely! Then re apply the electrical supply if the machine restarts then this is not acceptable and also your machine does not have a no volt release system fitted.
Taylor25880  
#12 Posted : 29 March 2011 11:38:51(UTC)
Rank: Forum user
Taylor25880

Thanks everyone for your constructive advice
Users browsing this topic
Guest
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.