Re: [CAD_CAM_EDM_DRO] maxnc/sherline

Taus,

I have an old Sears/Sherline mill which I recently converted to CNC
using the MAXNC 70 oz-in motors an driver board. I bought Sherline's
CNC motor mount/conversion kit. Love the motor mounts! The Z axis lead
screw was replaced as part of the kit. My mill was so old that I also
had to replace the X & Y lead screws to get the tapered & drilled ends
that connect to the shaft coupler. The first Y lead screw was too long
for my old mill! And one of the lead screws (I can't remember which was
the wrong hand. Sherline was quick to diagnose my needs and send the
proper lead screws (great service, I might say, especially since I
didn't know to say I had an old Sears/Sherline mill).

Anyway, I too was concerned about the Z axis, as I have always had a
little problem with the Z axis. But I'm working with the supplied
motors/driver! I must say, I'd like to go over the Z axis gib and
saddle nut setup some more until I can BETTER understand gib/ways setup,
but it is working and making parts! Yes, the 180 oz-in motors and
bipolar drives would be wonderful (translate 4-phase to step/dir), but
this will do for a while. I just wanted to get in there and make
things! Sometime in the future, I'll move the MAXNC hardware on to
another project. I have used the motion kits for other things, cheap
solution.

The counter springs DO look interesting, and I am following that mod.
SEE:

Randy Gordon-Gilmore <zephyrus@...>

But don't ask me about adjusting gibs, saddle nuts and lead screws! I'm
sure someone else can explain it better! (and I'll listen, too).

Alan May the Swarf be with you!


tauseef wrote:

>
> HI everyone, I am new to the group and want to thank everyone for
> such great posts! I have been reading as much as possible and have
> been learning very much! While I am a beginner CNCer I would like to
> comment on a few things.
>
> I have a sherline 5410 mill (the metric version) and I bought the
> sherline stepper motor mounts. I can say they are of GREAT quality as
> everything I have bought from sherline has been. I am very pleased
> with there fit and looks. They also include another Z-axis leadscrew
> that has the mount already placed. Very nice quality.
>
> I am also trying the MAXNC 3 axis 70 oz/in stepper motors on the
> sherline mill (borrowed from my brother) using the Maxnc pro software
> and I can say that it does NOT work. I have found no way, as maxnc
> says, that the motor has enough power to lift the "9ish" pound head
> of the sherline mill. I have spoken with the techs at maxnc about
> there "retro-fit kit" and they say it works fine on there sherline. I
> have setup the motors as there (terrible!!) manuel suggests and am
> using the Maxnc 10 driver board with a 2 amp power supply (they say a
> 1 amp is enough).
>
> As we tried to figure out why their sherline Z-axis moves up and mine
> does not it came down to the leadscrew. They use a 1/4-20 leadscrew
> in there retro fit kits (which must be tiny!) and I am using a 10mm-1
> leadscrew that came with my sherline stepper kit (the inch machine
> would come with a 3/8-20). Does this sound right? Would these two
> different leadscrews (mine being metic and differnt pitch) make it so
> the two machines handle differently?
>
> I would be interested in speaking with anyone that has made the maxnc
> 70 oz/in motors work on there sherline 5400 mill, especially the Z-
> axis.
>
> ANYHOW,
>
> I am thinking of getting a Camtronics 3 axis 2amp board and getting 3
> 180 oz/in 2amp bipolar motors...I feel this should fix all of my
> concerns. What size motors are other people using on there sherline?
> I saw the page where (I am sorry I forgot who) made a counterspring
> for the Z-axis and it looked GREAT! I will look into making one
> myself!
>
> THANK YOU AGAIN Everyone!
>
> taus
> sherline 5410 mill
>
>
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