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21st June 2019, 09:18 AM #16SENIOR MEMBER
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Looks like he is in the US? That gives me pause... But I have queued up his videos on VFDs, they will definitely be helpful by the looks!
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21st June 2019 09:18 AM # ADSGoogle Adsense Advertisement
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21st June 2019, 10:59 AM #17SENIOR MEMBER
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Any sparky will be able to do wiring and connections for your VFD when they are installing the 15A outlet. The programming and understanding the requirements of the motor windings needing to be in a delta config as Bob has stated is where I reckon most residential sparkies may be found lacking due to little or no experience with motor control.
If you can program and configure the unit yourself, you will save yourself some dollars and once you get the motor, post a pic of the internals of the terminal box.
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21st June 2019, 11:24 AM #18.
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Unfortunately that has not been my experience.
There's no doubt some sparkles already know how or are more than savvy enough to read the manuals and work it out for themselves.
However,
The young (30ish) sparky I bought my used 3P compressor from had not even heard of VFDs.
When the next door neighbour sparky came for a shed tour he said he had heard of VFDs but he would not know how to wire one up. When I offered to show him how, he said don't bother as he would just call in a more experienced sparky to do it.
At my mens shed I had to show our very experienced (50 years) shed sparky how to wire up a VFD.
When I recommend men's sheds get a 3Phase motor and VFD for their dust extractors I often get a call from their sparky asking questions about VFD that tells me they know little or nothing about them. Most work it out but I have still had to go and show a couple of sheds how to program their VFD.
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21st June 2019, 11:27 AM #19
Jack's a carpenter/joiner in Canada. He decided to equip his workshop(s) with mostly older British machinery (mostly Wadkin) and jokingly calls one shop the "Wadkin Temple". He's well known for having done the the greatest Wadkin PK (dimension saw) upgrade ever. He's a member here. Each year he holds an open day - the Rustfest:
Rustfest 2019 at the Wadkin Temple Canada
Cheers, Vann.Gatherer of rustyplanestools...
Proud member of the Wadkin Blockhead Club .
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21st June 2019, 11:33 AM #20
You are right Bob. Seven or so years ago when I wanted to have a 3Ph Rotary Converter I found most sparkies did not have a clue even with as much information as I had gathered. A Forumite 70 miles away volunteered to put all the bits together for me. One fellow I asked, told me it would not last very long and would probably result in a fire. His answer was to buy a petrol powered generator to get 3Ph.
My set up with the rotary is running trouble free and can deliver enough grunt when the machine is loaded up and working hard.Just do it!
Kind regards Rod
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21st June 2019, 12:52 PM #21.
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There are no doubt many sparkies in OZ that know all about VFDs but it's unlikely you will find them undertaking domestic wiring . The most likely places sparkies with VFD knowledge will be working are in industry but they are unlikely to be interested in wiring up a VFD for a single customer.. One of my relatives is a mechanical engineer specialising in mining equipment and he knows about them (on paper) as he stipulates them in many mining designs and apps. He's never had to wire one up but would be savvy enough to follow a VFD manual. He has an extensive home workshop but has never had any interest in installing one for himself.
Despite this sparkies are very useful (even essential in any electrical install) because the usually should the regs and therefore what can or cannot be done, so what they say does need to be taken very seriously
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26th June 2019, 03:12 PM #22SENIOR MEMBER
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Question for the brains trust - talking to a sparky today who says he works with VFDs a lot (and he didn't say anything that was so obviously wrong that I could detect it!)... He says that motor is 415v only (unusual according to him) and won't run off the 3 phase 240v which is output from a single-to-3-phase VFD. Any thoughts?
Not a complete disaster if he is correct, I can just connect to 3 phase - I'll just lose the ability to move it around the shop between GPOs.
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26th June 2019, 03:18 PM #23.
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26th June 2019, 03:23 PM #24SENIOR MEMBER
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I'll take some photos (and open up the connection box) tonight.
Thanks Bob!
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26th June 2019, 03:29 PM #25Gatherer of rusty
planestools...
Proud member of the Wadkin Blockhead Club .
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26th June 2019, 03:48 PM #26SENIOR MEMBER
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26th June 2019, 05:42 PM #27SENIOR MEMBER
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Photos:
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26th June 2019, 06:28 PM #28.
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Either your sparky doesn't want to get involved or doesn't know much about VFDs but that is definitely a convertible motor (I have a similar WEG 3kW motor on my DC but mine isa 2850 rpm - 2 pole motor).
Your motor is wired as a Y and it's just a matter of rearranging the brass connections between the terminals to convert it toe 240V ∆.
It's a matter of rearranging the brass strips (there will be 3 of them) marked by the red marks and connecting them .
Please don't attempt this yourself and get your sparky to do it.
VFDMotor.jpg
These WEG motors are very common and widely used on water Pumps and fans with VFDs.
I also notice your motor is 1430 rpm motor. In that case a VFD is really worth having so the speed can be boosted to 150 or 175% for belt work.
Does the machine have a disc as well as a belt?
Although you will have to be a bit more careful about not overheating the wood you'll find its MUCH faster with a fresh sanding belt than running at 1430.
For shaping work I sometime run my 3HP sander up to 3200 rpm using zirconia belts - makes a lot of dust but fair rips things into shape.
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26th June 2019, 07:25 PM #29GOLD MEMBER
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26th June 2019, 08:06 PM #30No liability is accepted by UBeaut or the Wood Working Forum's administrators
or moderators for advice offered by members posting replies
or asking questions regarding electrical work.
We strongly advise contacting a Licensed Tradeperson for all electrical work.WARNING
Information supplied within posts is not to be considered as detailed formal instructions to complete a task.
Members following such information do so at their own risk
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