Re: [CAD_CAM_EDM_DRO] Re: schematics

ljd102000 wrote:

>all the dealer said was it was a 2horse series 2 cnc head and
>something about 2J mechanical as he was trying to sell me a new
>series
>one mostly.
>
>

The 2J is NOT from the standard series-II machine. The 1J is usually
a 1 Hp (sometimes 1.5 Hp) J head with a 4-step pulley and backgear.
The 2J has 1.5 to 3 Hp and a vari-speed drive, otherwise the
same as the 1J. These are usually fitted to Series-I mills. Sometimes
tracer mills or multi-head Series-II machines will have several
1J or 2J heads fitted to them. The standard spindle taper is R-8,
but others are available.

The "CNC" head has a quill with an integral ballscrew, and it would
be very hard to retrofit for manual use. It is quite wonderful for
CNC use, though. Backlash? What's that?

The Series-II machine is much larger than the Series-I machine base,
and usually are fitted with the 4J, 4 HP vari-speed head. This usually
has a NMTB-40 spindle taper.

Jon