FIG. 1 is a perspective view of a base frame for an exercise machine, showing a first embodiment;
FIG. 2 is a side view of a base frame for an exercise machine, showing a first embodiment;
FIG. 3 is a top view of a base frame for an exercise machine, showing a first embodiment;
FIG. 4 is a front view of a base frame for an exercise machine, showing a first embodiment;
FIG. 5 is a perspective view of a base frame for an exercise machine, showing a second embodiment;
FIG. 6 is a side view of a base frame for an exercise machine, showing a second embodiment;
FIG. 7 is a top view of a base frame for an exercise machine, showing a second embodiment;
FIG. 8 is a front view of a base frame for an exercise machine, showing a second embodiment;
FIG. 9 is a perspective view of a base frame for an exercise machine, showing a third embodiment;
FIG. 10 is a side view of a base frame for an exercise machine, showing a third embodiment;
FIG. 11 is a top view of a base frame for an exercise machine, showing a third embodiment;
FIG. 12 is a front view of a base frame for an exercise machine, showing a third embodiment;
FIG. 13 is a perspective view of a base frame for an exercise machine, showing a fourth embodiment;
FIG. 14 is a side view of a base frame for an exercise machine, showing a fourth embodiment;
FIG. 15 is a top view of a base frame for an exercise machine, showing a fourth embodiment;
FIG. 16 is a front view of a base frame for an exercise machine, showing a fourth embodiment;
FIG. 17 is a perspective view of a base frame for an exercise machine, showing a fifth embodiment;
FIG. 18 is a side view of a base frame for an exercise machine, showing a fifth embodiment;
FIG. 19 is a top view of a base frame for an exercise machine, showing a fifth embodiment; and,
FIG. 20 is a front view of a base frame for an exercise machine, showing a fifth embodiment.
The broken lines in the drawings represent environmental subject matter and form no part of the claimed design.