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18th June 2019, 07:21 PM #1GOLD MEMBER
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Help: Hammer N4400 (3 phase) owners
If you own a 3 phase Hammer N4400 (probably a N3800 too), and a camera... I need your help.
I'm trying to work out whether a VFD conversion to single phase is worthwhile - there's a 2nd hand unit on machines4u. Waiting for Felder to get back to me on a single phase motor price, (expect it to be about the value of two kidneys), but would like to get a picture of the 3 phase motor spec plate for the forum boys to look at and suggest whether it's possible to do a conversion. I need the plate on the motor, not the machine, and possibly a picture of the inside of the junction box on the motor.
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20th June 2019, 06:36 PM #2Intermediate Member
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Hope this helps
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20th June 2019, 07:44 PM #3.
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This is very promising but until we see the inside of the mains/motor connection box we won't be 100% sure this is possible
MotorHammer.jpg
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22nd June 2019, 12:51 PM #4Intermediate Member
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Sorry for the delay.
I have the euro plug on the machine.
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And this is the inside of the wiring box it sits on the bottom off.
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22nd June 2019, 01:51 PM #5.
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What we need t see is the inside of junction box on the motor itself.
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22nd June 2019, 04:33 PM #6GOLD MEMBER
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Taking the plate at face value and I would because the same saw is sold in the US and I can't see Felder mislabelling a motor you could use a VFD to run this from a single phase supply. If I had known this saw was available it wouldn't still be there but I would not so that to you.
CHRIS
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23rd June 2019, 11:49 AM #7Intermediate Member
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23rd June 2019, 12:05 PM #8GOLD MEMBER
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You don't have to pull it apart. Just lift the cover off the junction box on the motor and photo the connections inside.
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23rd June 2019, 12:29 PM #9GOLD MEMBER
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Does anyone seriously think that Felder would install a motor that did not match the plate? The saw cold be run at 240v three phase using a VFD and that would make it a very versatile bandsaw.
CHRIS
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23rd June 2019, 01:00 PM #10.
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I agree it's very unlikely, just adopting a full belt and braces approach.
I have seen a few European motors, (eg ASEA/ABB and the Techno Motori motor on my Italian Belt sander) with motor internals that did not quite match the name plate.
On these motors even though the motor name plate and even some of the internal metal casting show ∆/Y conversions but the motor was hard wired as a Y.
The saw cold be run at 240v three phase using a VFD and that would make it a very versatile bandsaw
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23rd June 2019, 05:46 PM #11GOLD MEMBER
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That's Italian, this is Austrian/German.
CHRIS
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23rd June 2019, 05:57 PM #12Intermediate Member
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Taken my life in my hands and pulled, I hope, the correct plate off.
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Machine still works which is amazing for me. Wife would kill me if I broke it.
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23rd June 2019, 06:20 PM #13GOLD MEMBER
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Thank you all for the advice, and MrSlow for going the extra mile with those pics! What a forum
Chris and Bob, I hope I can bother you with more specific VFD advice if I secure the saw.
I'm going to give the seller a ring and have a chat. I have a sparky friend who has plenty of experience with VFD's. He reckons the VFD he'd be able to get would be around $550 wholesale, but I have a vague recollection that the Powtrans that users here have been using might be a bit cheaper, and as effective?
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23rd June 2019, 08:34 PM #14.
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Thanks for posting the pics Mr Slow, the Motor junction box photo completely confirms the motor is 240 3P ∆ compliant.
Now re the VFD.
$550 wholesale is very steep for a VFD for what is effectively a 3HP machine. I would expect to pay less than half that for a retail on-line price. This highlight the problem with some sparkys and VFD - most of them will not want to read and study a new VFD manual so they go for something they are familiar with, maybe they have used the same one in industry and there they are less likely to worry about price. That aside you should go with what your sparky suggests as he will be the one guaranteeing the work and eh won't want to come.
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23rd June 2019, 09:06 PM #15GOLD MEMBER
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If you confirm the sale PM me and we can go from there.
CHRIS