My 32" L.S. Barker Bandsaw is alive...

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17th September 2019, 09:03 PM
gtvone

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My 32" L.S. Barker Bandsaw is alive...

After a long time with not much time to work on restoring my saw, I've finally had the VFD all sorted, new tyres on, all re-greased, guides straightened out and after some fine tuning, fired her up today. A 45 second start-up time and 60 seconds to stop (the VFD doing the braking) and it all works really well. Still a few things to go, but...

...what this project has made me realise is that the saw is way too much saw for me and my small shed. :no:

Attachment 461558
17th September 2019, 09:06 PM
gtvone

1 Attachment(s)

The brain!

Attachment 461559
13th November 2019, 06:51 PM
ab1

Nice.. where did you get the tires done?
13th November 2019, 06:53 PM
ab1

.. and the wiring of that VSD is a disgrace.
14th November 2019, 10:21 PM
gtvone

Quote:

Originally Posted by ab1

.. and the wiring of that VSD is a disgrace.

It's fine, it's temporary.
14th November 2019, 10:23 PM
gtvone

Quote:

Originally Posted by ab1

Nice.. where did you get the tires done?

I bought the tyres from thewoodkid.com.au and glued them on with Sikaflex
6th April 2020, 04:26 PM
Turri

What is the reason for your VFD ?
i have a large bandsaw which screech’s at the start (with a DOL starter), would a VFD solve the problem?
i would appreciate your input
6th April 2020, 04:52 PM
BobL

Quote:

Originally Posted by gtvone

After a long time with not much time to work on restoring my saw, I've finally had the VFD all sorted, new tyres on, all re-greased, guides straightened out and after some fine tuning, fired her up today. A 45 second start-up time and 60 seconds to stop (the VFD doing the braking) and it all works really well.

IMHO 60s is still on the unsafe side even for a big BS. Have you tried making it shorter. Doe the VFD use a proper braking resistor? A VFD with a braking resistor should be able to do it much quicker, certainly <10s.
6th April 2020, 04:55 PM
BobL

Quote:

Originally Posted by Turri

What is the reason for your VFD ?
i have a large bandsaw which screech’s at the start (with a DOL starter), would a VFD solve the problem?
i would appreciate your input

The screeching is the belts slipping. Make sure the belts are correctly tightened and get some "belt grip"
eg CRC Belt Grip - 400g | Supercheap Auto

If you don't fix this in the long run the belts will be damaged.
7th April 2020, 03:20 PM
gtvone

Under about 30 seconds and the VFD starts to smoke (I only tried/made that mistake once). A 32" cast wheel carries a LOT of energy... I based my speed-down time on Andy Rawl's rebuild and settings. (And I'm the only one that uses it / is in the shed, so I'm fine with it.)
7th April 2020, 04:09 PM
BobL

1 Attachment(s)

Quote:

Originally Posted by gtvone

Under about 30 seconds and the VFD starts to smoke (I only tried/made that mistake once).

Well it does not surprise me it let out smoke unless it utilises a breaking resistor as shown below (rectangular silver thing under the VFD)
This is for a radial arm saw and stops the saw in 2 seconds.
Obviously it's not going to be 2s for a large bandsaw but it should still be under 10s.
BTW Not all VFDs have the built in circuitry to handle such braking resistors.
Attachment 471087

My BS is only a 19" but it runs for about 2 minute after it's switched off (virtually silently for the last 60s or so) and have been nearly caught out several times because it is so quite.

Although I also have a VFD on mine I added a foot brake which then means I can adjust the breaking pressure depending on the size of the band in use. For large/wide bands I can stop it in a couple of seconds whereas for a thin/narrow (6mm) band I worry about damaging this band if breaking too hard so I go easy on the brake so that it stops in about 10s.