I am just about to install the 80mm 2.2kw spindle on my standard sized SO3. It has been upgraded with the HDZ ballscrew Z axis. My question is that the Makita Router on the Z plus Z axis gave me around 4 inches of useable Z height.
With the PwnCNC 80 mm Spindle, I can obtain about 6.5 inches of Z height and I wondered if there was any information about how much spindle should protrude below the bottom edge of the 80mm spindle mount. I am also going to be using DustBoot V7.
The lower the height of the spindle, probably the spindle will sit in the spindle mount more securely and be less prone to oscillations which could possibly be induced into the casing, especially where the X rail was not tight enough and could be deflected when carrying the extra weight of the Z axis and the spindle combined. .
Have worked out a satisfactory answer. went for lining bottom edge of black casing with top edge of HDZ… this provides 130mm height from baseboard to bottom of clamping nut. Spindle held in 80mm spindle mount by bolts tightened to 15 Nm.
Thanks Chris. I think I have it worked out for now. I am looking forward to using the spindle, which I hope to hook up to the VFD on Monday. I have almost completed the assembly of the V7 dustboot too. The spindle is great quality and feels really solid and well made. I swapped the clamping nut for a REGO-FIX one so that I can use a torque wrench to clamp my REGO-FIX 5μm ER UP collets.
I did notice that the PwnCNC supplied clamping nut with your spindle had been balanced and that was a nice surprise. (as was the unexpected screwdriver, key fob and Skittles sweets) The REGO-FIX clamping nuts are available in several flavours. I was told that the REGO-FIX nut I have fitted to the spindle is balanced to 80,000 RPM.
I found a local supplier of REGO-FiX tooling and decided to go with them because I figured that the inventor of the ER collet system (way back in 1972) ought to know something about how best to use them. I have included an image of the recommended torque settings.
