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David's Mini Lathe......
DavoDavo:
--- Quote from: John Rudd on October 11, 2019, 05:16:40 PM ---David looks like theres an issue with the board then...
Would you like me to look at it and effect a repair? :zap:
( I just checked, a new board is £132... From Arc..Ouch, didnt think they were that much...)
--- End quote ---
Hi John,
Sorry to hijack this thread but I'm hoping you can help me.
I have a Sieg X2 Mini-Mill with an FC350BJ/230V motor controller board that has bitten the dust :zap: (motor speed goes berserk on full throttle - somewhere around twice its rated speed of 6,000 RPM).
The motor is 350Watt 230V, same specs as the lathe I believe.
The original board is no longer available and it seems that the replacement is the XMT-2335.
The XMT-2335 has more terminals than the old board and I haven't been able to see how they are labelled from any pics of it, and I don't have a circuit diagram for the mill either, so I'm wondering how to wire it up, I looked very carefully at the pics that were posted of David's lathe controller but couldn't see how it was wired - you mentioned a small transformer in one of your posts but I think that is a power supply for the lathe speed display.
The terminals on the FC350BJ are:
1 and 2 - DC for Motor,
3 and 4 - AC for 230V Mains input,
5 Not sure what it's for (goes to one of the switches on the panel I think, the board is on my desk right now), and
6 and 7 jumpered together.
And then there are P1, P2 and P3 for the control pot.
:bow: I'd be very grateful if you would let me know what you can about it, you know a lot more about these infernal devices than I do.
Many thanks from an Expat-Pom living in Australia.
Cheers,
Davo.
John Rudd:
Dave,
Helping is no problem....
I'll dig out the schematic for the XM board, I think the best thing to do is take this off line...my email address should be in my profile or you could pm yours to me....
If the motor is going flat out then chances are the fets are shorted....board can be repaired but I doubt you'll find any one down under...you could send it to me here in the uk....
Stilldrillin:
By ek!
It's been a while, since I showed anything about this project. :palm:
All the loose bits have already gone to Scotland.
And the lathe is slowly being crated, ready to follow.
Must find and show some pics.....
Stilldrillin:
This lathe refurb, was always intended to be a long term project. As, when, and if....
Consequently, it is still on schedule. :thumbup:
Back in February, a new 4" chuck and adaptor, arrived......
I made three balance plugs for the redundant holes in the adaptor plate. Then realised, only one was needed! :doh:
I like to fit 40mm x m6 grubscrews, shortened as necessary, as chuck studs....
Everything fitted together well. But the workpiece insisted on 5thou'+ eccentricity!
Started to check every locating point.....
All's well here, too......
That's disappointing! The chuck is 5-6 thou eccentric, on all three (six) jaws...... :(
Relieved the locating recess, by a few thou per side.
It's easy enough, while changing chucks, to set true to a mandrel. Before finally nipping the chuck nuts.....
Thanks for looking in! :thumbup:
vtsteam:
:clap: :clap: :clap:
Great project David! Sorry I've been away and missed the start.
:beer:
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