First off thanks for this amazing project!
Have finished my build of the MPCNC just recently and need to decide on a spindle. I am in the Netherlands and need something on 220V. Speed control is something that I want incoorporated. The makita and dewalts were only available in 110V options and quite expensive to get here.
So up until now I have got 2 options in mind;
a chinese 0.8kW air cooled spindle controlled with a VFD inverter; from ebay
a Foredom SR-series flexible shaft motor, genuine one not a cheap ripoff
i’m thinking the spindle/VFD is nice because it’s a dedicated machine specifically made for the job, has a lot of different control/monitoring options. Downside is that I don’y have any guarentee and it could be any quality, might not last for a long time
The foredom is good because the handpiece is very light so the mpcnc isn’t stressed because of weight. (Or is it better to have some weight? I guess there is always a tradeoff? Bit more weight helps with milling but is more destructive to the machine?). Also good are warrenty, servicable parts and a trusted quality. Downside is higher price and it has a lot less power (125W).
So I kinda decided to go for a spindle+VFD for now, ordered & received last week. But I realized it was a lot heavier then I thought: around 2.5kg or 5.5lbs.
So I wanted to ask some people that have actually used the MPCNC what your thoughts are on spindle/tool weight. Do you think the 5.5lbs spindle is too much? What about a super light tool like the handpiece of a foredom?
My frame is quite big (78x78x15cm) because I figured I can always scale down a bit. I would like to do different stuff with it, maybe milling some woods& platics, but mostly aluminium faceplates 2 or 3 mm thick and, if it is accurate enough pcbs. A 3d print extruder is also on the way.
Allright that’s it for now