Hello Matt & John here. Excited CNC Newbies

[irving2008]

Irving there's a massive difference in weight between the rubbish he had and the WC spindles and the Z axis stepper on the 3040 is not very strong so it will affect tuning.
Expect having to drop the acceleration and possibly velocity.?

Also think about the mounting has the WC spindle is much longer and larger than the standard and will need a good mount making and possibly new back plate.?

Hmmm, if you say so Jazz... The quick google suggested otherwise but it may be I wasn't looking at the same thing. On reflection, given the flexible nature of the beast you may well be right about needing to drop the acceleration since the gantry isn't the heaviest thing and even a small increase in spindle mass might be a large percentage of the overall moving mass.. I was thinking it was a small increase, say < 15% or so

[JAZZCNC]

Hmmm, if you say so Jazz... The quick google suggested otherwise but it may be I wasn't looking at the same thing. On reflection, given the flexible nature of the beast you may well be right about needing to drop the acceleration since the gantry isn't the heaviest thing and even a small increase in spindle mass might be a large percentage of the overall moving mass.. I was thinking it was a small increase, say < 15% or so

Hi Irving sorry if I came over wrong.? Wasn't having a go just that I've had my hands on one of these things and the spindles are biggest pile of shite and proper mickey mouse. I've also had plenty of the small WC spindles and they are probably twice the weight of these spindles.!

Some thing else I think will be a factor that I didn't mention at time will be the strain the extra weight will put on the Z axis bearings which again are cheap units.!