I can only guess ... First, maybe using a low voltage DC motor was cheaper than using a mains AC motor (costs for motor plus electronics for RPM control). Second, the spindle motors you can actually buy are for some reasons usually either DC or high frequency / high voltage AC, not mains AC.
Unfortunately those short duty cycles are a limitation of many Proxxon tools. But I think the 10 minutes at full power (250W) specified for the BFW 40/E are kinda OK for manual milling. I can't think of a single operation that would take longer than that. Using that spindle for serious CNC is of course out of the question.
@@robertssmorgasbord well brick acid is cheapest strongest and most dangerous.. you will have to choose, Eye protection a must... gloves also, please be careful :)
Nice piece to have in a workshop....cheers.
Indeed it is! Just two more pieces to overhaul and I have a little mill :-)
Why did they choose an external power supply instead of main AC? I have a similar size 1 horsepower Makita router and it plugs directly to the wall.
I can only guess ... First, maybe using a low voltage DC motor was cheaper than using a mains AC motor (costs for motor plus electronics for RPM control). Second, the spindle motors you can actually buy are for some reasons usually either DC or high frequency / high voltage AC, not mains AC.
I bought the new model spindle as the duty cycle on this spindle is far too short.
Unfortunately those short duty cycles are a limitation of many Proxxon tools. But I think the 10 minutes at full power (250W) specified for the BFW 40/E are kinda OK for manual milling. I can't think of a single operation that would take longer than that. Using that spindle for serious CNC is of course out of the question.
yay muriatic acid will clear the rust !
Thanks for the info! What concentration would you recommend? I can get here in Germany either 4%-5%, 30%-33% or 37%.
@@robertssmorgasbord well brick acid is cheapest strongest and most dangerous.. you will have to choose, Eye protection a must... gloves also, please be careful :)
@@David_11111 OK, brick acid is about in the middle regarding the concentration. I'll give it a try next time I stumble about some corroded metal :-)