it has been a long time since the last post on this thread was posted and because of recent issues with my Dewalt I am looking into VFD spindles. From what I understand most people use 800w because of the weight. Looking at the date of the posts on this subject I assume they are talking about the 2 pieces X axis.
I have not found any information regarding the use larger (1.5 or 2.2kw) spindles on the new wide makerslide. I think that I would need to add support to the 2 extrusion on the Y axis. Would the makerslide upgrade be able to sustain the weight of a 1.5kw spindle without issue?
I would probably go with the 800w based on what most are using but it seems that there are some 1.5kw spindles that uses ER 16 collets which, if I understand correctly would allow me to use a wider range of bit size than the ER11 the 800w comes with.