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4 axis stepper motor control
Stepper motors, 50,800 steps/rev, matched to the inertia of the driven mechanism
makes for steep and controlled acceleration ramps in four axis (drill feed, drill rotation,
linear index, rotary index). Three holes can be made in a second with optional high power
motor drivers (3.5 Amps per axis). Multiple drill heads can be added to increase cutting speed.
Cutting parameters stored in the program of the machine drive the drill precisely through
the wall of the catheter to make a hole that is rounded on the outside and burr free on
the inside. Both drills and catheter are held in position with high accuracy to deliver
the utmost results.
Count and capture cores
The cores are evacuated through the drill bit to the machine, counted, and captured in a
filter. This virtually eliminates the chance of loose cores in the catheter or uncut holes
while keeping the work area clear of debris.
Experience with many lumen configurations
The machine can be tooled for complex lumen configurations. This includes double Dee,
concentric tubes, double barrel shotgun, crescent moon etc. High magnification camera and
vision system can be added to accurately locate the smallest lumen.
Wide range of applications
The machine can accept catheter diameters from 3 French (0.040") to 50 French (0.500"). Hole
diameter can be from 0.018" to 0.300". The linear indexer can be stretched to accommodate
hole spacing to 4 feet. The machine can be adapted to make two or three different hole
diameters in one machine cycle.
The cost of a disposable inner mandrel is eliminated in most applications. The sharp
ground edge of the drill and tightly controlled drilling process make burr free holes
without the support of a mandrel in the most difficult materials.
Fast because parameters stored in memory
All set-up parameters are stored in the memory of the stepper motor controller. As
many as seven different set-ups can be stored. The person changing a set up only needs to
change the drill bit, zero the drill bit edge against the surface of the catheter,
and move a tooling plate to a new position. An experienced technician can do this in
a couple of minutes.