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17th September 2019, 09:03 PM #1
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.
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17th September 2019 09:03 PM # ADSGoogle Adsense Advertisement
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17th September 2019, 09:06 PM #2
The brain!
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13th November 2019, 06:51 PM #3Senior Member
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Nice.. where did you get the tires done?
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13th November 2019, 06:53 PM #4Senior Member
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.. and the wiring of that VSD is a disgrace.
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14th November 2019, 10:21 PM #5
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14th November 2019, 10:23 PM #6
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6th April 2020, 04:26 PM #7New Member
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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
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6th April 2020, 04:52 PM #8.
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6th April 2020, 04:55 PM #9.
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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.
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7th April 2020, 03:20 PM #10
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.)
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7th April 2020, 04:09 PM #11.
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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.
VFDandBrake.jpg
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.
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