It's obviously a pointless stunt as presented. At 24VDC the motor was
developing 55W and most of that energy went into accelerating and
decelerating the screw.
At 75VDC I was getting 2.5 meters/sec (100 IPS) but it was hurting
the stage by being beyond the screw's critical RPM. No video on that
because I didn't want to repeat it numerous times.
What matters is the stage is going to be equipped with rate-damped
compression spring loads next. This will be to test and run data on
the "unstallable stepper project" algorithms for when a closed-loop
stepper runs into a load beyond what it can sustain at the programmed
velocity rate.
This was all fun in videoing what the axis can comfortably do at
moderate speeds. Next comes dealing with the adaptive algorithms
which are supposed to slow the G100 down during high-speed overloads.
Mariss
--- In mach1mach2cnc@..., "nattyone960" <nattyone960@...>
wrote:
Pretty violent R&D.
--- In mach1mach2cnc@..., "Mariss Freimanis"
<mariss92705@> wrote:
Not so sure you want that:-)
In the previous run I had the G201 cranked up to 75VDC; the motor
develops 165W+ at that voltage. On the 1-TPI screw it developed
22lbs
(10kg) thrust at 10 meters/min.
It took a nice gouge out of my thumb, the kind it takes super-
glue
to
close up and stop the bleeding.
Furthermore I had a brick instead of the "action figure" as the
load.
The brick was duct-taped to the stage; it flew off and destroyed
my
PC keyboard upon the 2-G deceleration I had programmed.
I decided to play it safe one bloody thumb and and new keyboard
later
when I ran the video. I hit the mouse key to start things and it
darn
near took another bite out of me. Deleted cussing ensued.
Moral: Stay clear of fast-moving stuff unless you want to shed a
little unplanned blood.
Mariss
--- In mach1mach2cnc@..., Wayne Weedon <wayne@> wrote:
Mariss Freimanis wrote:
Hi,
Cross-posted from the geckodrive group. I thought people here
might
be interested in it.
--------------------------------------
I uploaded a short video that has an axis tooling along at
3,932
IPM.
Please go to:
Great stuff Mariss , but I think at least we should of got the
full
gory
version Swearing, Blood n all!
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Wayne M Weedon Email: wayne@
Fdos Design Poole UK
Tel +44-1202-677025 Fax +44-1202-770515 Mobile:
07774
439915
Specialists in small batch & Production Mechanical/Electrical
Engineering
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