Re: [CAD_CAM_EDM_DRO] Re: Can a PC operate a BOSS 5 or 6? (and a question)

Hi Nathan,

This a a fairly common problem. After a lot of use the slideway oil
tends to leave a gummy deposit where the quill slides in the head. I
found that taking the front cover off, cleaning out the oil then pouring
in some cellulose (lacquer) thinners and running the quill up and down a
few hundred times helped wash out the crap.

You can change to a servo on the Z without changing the other axes. That
servo you are looking at hasn't really got enough torque to use as
drop-in replacement. Ideally you need one with 2.5 - 3x the torque. You
can get around the problem by fitting a smaller pulley on the motor but
this can be hard work. It is a big job to change the belt. If you do
this be very careful to make sure the ball nut does not run off the end
of the screw. According to Bridgeport if you do this you have to replace
the nut and screw! You may also have to relocate the motor mounting
holes if the belt does not line up perfectly.

Les


rocketscientistnate wrote:

> Now that i've said it can be done, I have a question for everyone
> else. One problem I've had recently is the Z axis stepper keeps
> losing steps. I wrote about a month ago and said it was losing
> power (by the way thanks to all who replied, I don't get on here
> very often), but a few changes in my acceleration profile, and it
> seems to run pretty fast again. However all the adjustments I make
> don't seem to fix the step loss problem. It doesn't lose them all
> the time either. I'm running a 3d profiling program with about
> 65,000 lines of code, with the top of the part at Z0, and the bottom
> at Z-.150. By the end of the program its usually off by about .050"
> but sometimes as much as .200". Also this motor seems a lot hotter
> than the Y and X motors, although they are all the same kind of
> motor.
>
> I'm considering changing to servos, but don't have any experience
> with them. Would I be able to change just the Z axis to a servo and
> geck0 3whatever, and leave steppers on x and y? I found what looks
> like a good deal on www.homeshopcnc.com and would like to know if
> this servo would drive this machine.
>
> thanks
> Nathan Clymer
>
>
>
>
>
>
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