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Nah--you can have single phase input with three phase output with most of the small inverters like you need to drive this spindle. I run 220 single phase in with 300hz max three phase output on mine.
Dave
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I think you will need a 3 phase input to get the 300hz
Originally Posted by pencil_&_paper
Nah--you can have single phase input with three phase output with most of the small inverters like you need to drive this spindle. I run 220 single phase in with 300hz max three phase output on mine.
Dave
A sales manager for Teknomotor spindles has recommended that a line reactor be used with these spindles. This might be useful for others that own Teknomotor spindles. Here's the email I received from them:
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"The motor has 12 months warranty from the date we ship it out.
Do you have a line reactor connected between the motor and the VFD?
We strongly recommend that you install a line reactor between the motor and the VFD if this was not already installed by the OEM.
If it is a warranty issue the spindle will fail in the first hours of operation.
Call me for any questions you might have.
Thanks for choosing Teknomotor."
Best regards,
Sales Manager
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I wasn't familiar with what a line reactor is, so I found a good article that describes their operation:
Line Reactors and VFDs
In short, line reactors extend the life of the motor and drives by:
* Harmonic frequency attenuation
* Current-limiting protection for the motor
* Attenuates EMI (noise produced by the system)
* Captures transient voltage spikes
* Reduces motor noise, and reduces damage to the stator windings
* Reduces motor temperature up to 20 degrees (double the life of the motor)
* VFD protection from current
I think I'd be concerned that the sales manager states without a conditioning filter the spindle will fails in the first hour(s)!
That's a most unusual response I would think?
This indicates the equipment isn't up to the usual required specs per receiving/generating EMF/EMI.
cheers,
Ian
It's rumoured that everytime someone buys a TB6560 based board, an engineer cries!
Hi Ian,
Thanks for the head's-up. I don't think that's what he meant, even though it was worded strangely. Usually with anything electronic (esp. Integrated Circuits), if it's going to fail it will usually fail after the first few uses unless it's abused. In some cases the electrolytic paste in capacitors can dry out over time, or a PCB could be dropped and fractured, etc etc...
I think he was trying to say that if there's a warranty issue, it will usually show up in the first few days of usage. He didn't try selling me any of his products, however, I will for sure be using a $50 line reactor with a $1400 spindle. It's a small price to pay to have your equipment last twice as long.
"The bitter taste of poor quality lingers long after the sweet smell of a cheap price disappears." -Ain't that the truth.
If you dont mind me asking where are you getting one for $ 50.00 ? I have the same spindle and need to get one.
Thanks
Hi Ven0r,
I'll be buying an VFD with the line reactor (filter) built in. I don't advocate any specific product, but try Ebay and search for "Fuji Inverter" for instance. I'll probably spend $300 to $600 on an inverter. Make sure you cross-reference the model number and get all the features you need, especially the base frequency (Hz), kW, and 1 or 3 phase input/output to match your spindle. I'll be buying one that is NIB, new in the box.
Hope this helps you out a bit.
Here's some VFDs at a good price:
(Look at model number: FM50-203-C, or scroll down to the CV7300 Series AC Drives, and look at model number: CV-2003-H1) They also carry AC line reactors.
http://factorymation.info/catalog/fmcat_acdrives.pdf
Last edited by pencil_&_paper; 10-06-2011 at 03:39 PM.
Mike
The line reactor is more for the inverter to make sure clean power and not to get spikes.
What he meant about spindle failing is,if the spindle fails it mostly with in couple hours of using first time you would know if it has problems,
XZero CNC
If you have your M6 hex screws and ball-spring T-nuts, you're off to the races. I started the table-top with the first length being flush with the front of the machine, and it worked out great.
It can be a bit time-consuming putting in the nuts and lining up the table top with them, but the whole process won't take you more than 45 minutes. I used a small level to make sure the first piece was perfectly flush with the front of the frame, and then used it again for lining up the edges of each new piece.
http://www.youtube.com/watch?v=2_PRKfMrMfw]Getting Started With The Table-Top.AVI - YouTube
I took 5 minutes and made double sure that the first piece was exactly flush with the front frame, and after that, each piece was a breeze to put on.
When I finished tightening down the table-top, my first corner-to-corner measurement was just over 1/8-in. off, and I noticed there was a middle piece of table-top that had a 1mm space where it butted up against the previous piece.
I took that piece out, turned it around (space pointing away from cnc), and put it at the very end. I then loosened and slid all the remaining pieces back into place. When I measured corner-to-corner the 2nd time after getting rid of the small space, I was within 1/32-in. of perfect square on both sides.
http://www.youtube.com/watch?v=Nc10SZyJ56s]The Finished Table-Top.AVI - YouTube
The XZero table-top was very easy to put together. The biggest part was waiting for the T-nuts and screws to be delivered. Now that the table-top is completed, I'm just waiting for my 8-inch Z-axis from George. Maybe I'll mount my motors in the meantime.
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