Centroid DP-4 User manual

DP-4 Touch Probe
Operator's Manual
U.S Patent #6553682
Rev 2019-05-28
Cop right © 2003-2020 Centroid Corporation
Howard, PA 16841

DP-4 Quick Start Guide
1. Install Probe cable assembly #11085 i necessary. Re er to Common Cables picture on page 11,
connection diagram on page 12 and appropriate appendix data.
2. Connect coil cord to DP-4 and to bulkhead connector on probe cable assembly #11085. See
probe eatures and general description page 1. LED indicating light should be green when
connection is made then turn red when stylus mount boss is touched.
3. Set system control parameters. See appropriate Appendix or parameter settings. See “Output
Switch Logic Selection” page 5 i application requires a normally closed probe output
connection.
4. Con irm machine is responding to DP-4 input by running an automatic cycle without the probe
in the spindle and manually touching the DP-4 stylus mount boss. Re er to control operator's
manual on how to run automatic probing cycles.
5. Install a tool holder in the spindle then install the DP-4 and then the stylus. See Stylus
installation procedures on page 3 and per orm run-out adjustment as shown on page 3 and 4.
6. Review stylus travel limits on page 2 and ollow the detailed initial setup on page 6 to per orm
an automatic probing cycle at reduced speed.
7. Calibrate stylus tip size. See procedures on page 6.
8. Review “Per ormance Characteristics” page 8 to ensure good results.
9. Review Adjustments page 3,4,5 and Maintenance and Care page 9 to keep DP-4 in good
operational condition.
10. Probe is now ready to use.

TABLE OF CONTENTS
General Description Page 1
Speci ications Page 2
Stylus Installation and Alignment Procedures Page 3
Run-out Adjustment “Dialing-in”
When to check run-out and dial-in
Angular Alignment Adjustment
Output Switch Logic Selection Page 5
Initial Control/Probe Setup Procedure Page 6
Stylus Tip Diameter Calibration Page 6
Per ormance Characteristics Page 8
Maintenance and Care Page 9
Shipping Instructions Page 9
Kit Contents Page 10
Common Cables Page 11
Connection Diagram (universal) Page 12
Grid Digitizing Tips Page 13
Cutting a Copy o Digitized Part, Tips Page 14
Appendix A – Centroid Control System CNC12 application data
Appendix B – Centroid Control System CNC11 application data
Appendix C – Centroid Control System CNC10 application data
Appendix D – Non-Centroid Control System application data

DP-4 PROBE GENERAL DESCRIPTION AND SPECIFICATIONS
GENERAL DESCRIPTION:
The DP-4 is a “touch probe” intended for probing to find part zero’s, reference positions, locate bores,
bases, corners etc., and digitizing which allows for the copying of surfaces and shaped ob ects. The
user should first become familiar with the various parts and features of the probe as shown above to
facilitate assembly, installation and calibration. Read the stylus installation and alignment procedures
section before attempting assembly. Review the over-travel limits shown in the specifications.
Exceeding the limits will damage the probe and stylus.
MOUNTING FEATURES:
The mounting shank design allows installation in the spindle of most machines. Other mounting
options are easily installed by loosening the run-out ad ustment screws and removing the shank from
the body. These options include smaller diameter shank or magnet or custom made forms.
OUTPUT FEATURES:
The output signal is a sink type compatible with most control inputs that can be configured for
normally open or closed logic. See CONNECTION DIAGRAM UNIVERSAL section. This choice
can be specified when ordering or can be changed by the user via an internal umper block. The state
of the switch changes when the stylus physically touches a surface. The DP-4 can be easily interfaced
to any CNC control which accepts this common type of input signal. A high quality 5 pin connector
through the probe body provides a convenient disconnect point for the stock 6 foot retractile cord. A
positive lock/unlock sliding sleeve on the cord connector facilitate fast reliable set-up and removal.
1
Mounting shank
Run-out ad ustment screws
Use 3/32” hex wrench
LED indicator light
Green = ready
Red = tripped
Angular alignment screws
Set at factory
Rubber seal
Stylus mount boss
Use 3/16” wrench on flats
Stylus tightening hole
DP-4 REAR VIEW
Electrical
connector
Core index screw
Flush with body
Body
End cap
Stylus stem
Stylus tip
DP-4 front and rear v ews shown w th opt onal stylus attached.
DP-4 FRONT VIEW

DP-4 SPECIFICATIONS:
Probing directions X+/-, Y+/-, Z-
Unidirectional repeatability (2 sigma) 0.00004” (1 micron)
Probe deflection force (X,Y) 3 ounce minimum with 40mm stylus
Pre-travel variation X-Y plane 0.001” with 40 mm stylus
Probe deflection force (Z) 9 ounce minimum
Probe body diameter and length D= 1.25” (31.8mm) L= 2.2” (56.4mm)
Mounting shank diameter and length D= 0.5” (12.7mm) L= 1.47” (37.2mm)
Stylus mount thread M3
Output signal Switch (FET open drain) 30V 50mA
Output logic Selectable normally open or closed
Power supply required 10 – 30 VDC 50mA
LED status indicator green = ready, red = tripped
Weight of probe and ½”shank 0.45 lb
Over travel limit angle (X,Y) +/- 10 degrees from vertical
Over travel limit (Z-) 0.15” (3.8mm)
Environmental IP54, Dust Proof
Note: To calculate actual X or Y over travel distance multiply stylus length by 0.173
2

STYLUS INSTALLATION AND ALIGNMENT PROCEEDURES
Important: Read the complete alignment procedure before starting.
The run-out ad ustment procedure, also called “Dialing-in” is necessary to ensure that the center of the
probe tip is aligned with the center of the spindle rotation axis. This eliminates any undesired off-sets
between the probe and the cutting tool centers when digitizing or doing automated part set-up.
Requ red Tools:
3/16” open end wrench
3/32” hex wrench
0.001" or better Dial Indicator with Magnetic Base
0.500" Dedicated Tool Holder
STEP 1: Install the DP-4 Probe into the dedicated 0.500" tool holder.
STEP 2: Install the complete assembly into the milling machine spindle without the retractile cord.
STEP 3: Install the 2.5 or 5mm stylus in your DP-4 probe. Thread the stylus into the probe stylus
mount boss until finger tight. Insert the stylus tightening pin, from your tool kit, into the hole located at
the base of the stylus stem and place the 3/16" wrench, from your tool kit, on the flats of the stylus
mount boss. Refer to the picture below. Do not apply any twisting force with the 3/16" wrench; use the
wrench to counter the twisting force being applied to the stylus by the tightening pin. Excessive
twisting force applied to the probe could damage the sensor assembly!
Tightening stylus with wrench and pin
3

RUN-OUT ADJUSTMENT:
STEP 4: Position the dial indicator, as shown in the photo below, with the finger of the dial indicator
on the front and center of the stylus ball. Insert the 3/32” hex wrench in the run-out ad ustment set
screw directly above the finger of the dial indicator. Loosen the set screw by turning the hex wrench
counter clockwise while watching the dial indicator reading decrease. Turn the hex wrench clockwise
and watch the dial indicator reading increase.
Run-out Adjustment set-up and effect of Set Screw Movement
STEP 5: Rotate the spindle by hand (without touching the probe) so that the probe spins through a
full 360 degrees and watch the dial indicator to locate the high and low run-out rotation positions of the
stylus. Ad ust the dial indicator so that the entire run-out of the tip can be seen on the dial. If the run-
out exceeds the range of the dial then begin at the highest point of the run-out and set the dial indicator
so it is at the limit of its range at this point.
STEP 6: Rotate the probe so that the nearest run-out ad ustment set screw is above the finger tip
of the indicator. Using the 3/32" hex wrench slowly turn the setscrew directly above the indicator
finger, in the counter clock-wise direction, the dial indicator will show the reduction in the run-out.
Stop loosening this set screw and tighten the set screw that was nearest the low run-out position. Do not
allow the probe to become loose on the mounting shank.
STEP 7: Repeat steps 5 and 6 until no run-out of the tip is visible on the dial indicator needle. If
the screws become too tight before you have finished the ad ustment, do not force them, instead
loosen the setscrew that corresponds with the highest reading on the dial indicator, (refer to figure 3.2)
and tighten the set screw at the lowest reading. Only ad ust a set screw when it is directly above the
indicator finger. This way you can see the full effect of the ad ustment you are making.
4

WHEN TO CHECK RUN-OUT:
Any time the probe is removed from its holder, the stylus is changed or the probe is used in a different
machine, the alignment procedure should be repeated to ensure accuracy. The user should also repeat
the alignment procedure if the unit is dropped or receives any sudden external shock. It is good practice
to periodically check alignment for quality control and to establish a base line maintenance schedule.
ANGULAR ALIGNMENT:
Angular alignment is the relation of the spindle center line to the stylus stem center line. This
ad ustment provides for equal clearance all around the stylus stem. This ad ustment is rarely needed
except when extremely small or long stylus is used. When the stylus tip and stem are nearly the same
diameter this ad ustment is critical to keep the stem from contacting a vertical surface before the tip.
This ad ustment is also convenient to ad ust parallelism when flat disc or block stylus types are used.
The range of ad ustment is very small as it is only intended to correct the stylus and spindle center line
continuity. If this ad ustment must be performed use the run-out ad ustment set-up shown above to
monitor the effect of the ad ustment. The angular alignment and run-out ad ustments are
interdependent. It will be necessary to repeat each several times to achieve significant results. When
completed, the run-out at the stylus mount end of the stylus stem should be nearly the same as the run-
out at the tip. Ad ust the stylus tip run-out last.
To check the angular alignment begin by completing the “Dialing-in” procedures for the probe tip.
Measure the run-out at the base of the stylus stem (the end away from the tip) with the dial indicator. If
the run-out is greater than the difference between the tip diameter and stem diameter then it will be
possible for the stem to contact a vertical surface before the tip (also called “shanking out”).
The angular alignment is accomplished by first performing a “Dialing-in” procedure on the stem base
using the run-out ad ustment set screws. Next, the tip is dialed-in using the angular ad ustment set
screws in the end cap of the probe. These two steps are repeated until the difference in run-out between
the tip and stem base is acceptable. Be sure all set screws are equally tight when finished.
OUTPUT SWITCH LOGIC SELECTION:
The DP-4 output is a solid state switch that can be configured for normally open or closed logic. This
choice can be specified when ordering (recommended) or can be changed in the field. The standard
configuration for the stock DP-4 is normally open. A umper block located under the mounting shank
inside the probe sets the logic. To access the umper block unplug the probe, remove the stylus, loosen
the run-out ad ustment screws and remove the mounting shank. Be careful not do damage any wires or
allow any dirt or debris inside the probe. Move the umper from its present position to the opposite end
of the three pin header to invert the logic. Use tweezers or small pliers to slide the umper block up off
the pins and then slide it down on the pins at the opposite end of the three pin header. Install the
mounting shank and snug the run out ad ustment screws. The run out ad ustment must be performed
any time the mounting shank is removed.
5

INITIAL CONTROL/PROBE SETUP PROCEDURE
STEP 1: Confirm that control parameters are setup correctly for your system. The automatic
probing cycles will not work if the parameters are not correctly set. See appendix to check the default
parameter settings for the appropriate control system. Check the control operation manual if compatible
parameter settings are not found in the appendix.
STEP 2: Plug the 6' retractile cord into the DP-4 probe and into the digitizing port on the control.
The cord ends are keyed to prevent incorrect connection. At the probe end line-up the red dot with the
red painted slot on the probe connector, push the plug in until it clicks. At the opposite cord end insert
the large black connector and rotate until it drops into the digitizing port connector then finger tighten
the securing ring to seat the connector. The LED indicating light on the front of the probe should be
illuminated bright green. Touch the probe tip and the LED should turn red.
STEP 3: Press <Alt+I> to open the centroid PLC I/O diagnostic screen. Locate the inputs entered
in parameters 11 and 18. Verify that they change correctly when the probe is triggered (parameter 11)
and plugged in (parameter 18).
STEP 4:
Review the probe overtravel limits in the specifications on page 2. Perform an automatic probe cycle
test with the feedrate over ride reduced to 20% and the stylus 10 inches away from any ob ect to verify
everything is working together. Be prepared to manually stop the machine to prevent overtravel
damage to the probe. From the main screen, press <F1-Setup>, then <F1-part>, then <F5-Probing>,
then <F7-Single Axis>, <F1-Orient> to move the probe in the desired direction and finally <Cycle
Start>. The control will og the stylus in the direction of the single axis move selected. Touch the stylus
once and the control will stop and reverse travel the probe clearance amount then stop and then resume
motion in the single axis direction at the slow probe rate. Touch the stylus once and the control will
stop and display a position window. Repeat this step and ad ust parameters as needed to gain
confidence using the automated cycles.
STYLUS TIP DIAMETER CALIBRATION:
The final procedure is to calibrate your probe stylus diameter for the tool library. Although the ruby
ball (tip) diameter of the furnished styli is either 2.5mm or 5mm, entering these values in the tool
library will not produce accurate results unless they are corrected for stylus pre-travel.
Pre-travel is the amount of deflection of the stylus tip before the probe detects the surface. This value
varies depending on the length of the stylus and the speed and direction that the stylus tip is moving
when it makes contact with the surface being probed or digitized. Pre-travel variation amount should be
stated in probe specifications relative to stylus length and direction of travel limitations. A probe that
has small pre-travel variation with no restriction on stylus length and direction of travel will be quite
expensive. Machine characteristics including lash and input latency also contribute to the need to
calibrate the stylus diameter.
In order to achieve optimal results when probing or digitizing you must calibrate the tip size to
compensate for the sum of the effects previously mentioned. The following procedure is the quickest
way to determine the calibrated diameter. This procedure uses Centroid (TM) automatic probing
cycles. Consult your operation manual for similar probing cycles for your machine.
6

STYLUS TIP DIAMETER CALIBRATION PROCEDURE:
STEP 1: On the mill table, fixture the precision ring gauge from the probe tool kit. The ring must
lie flat with the center line of the bore aligned with the center line of the probe stylus. Note the
diameter of the gauge.
STEP 2: Jog the probe over the center (roughly) of the ring gauge, and then slowly og the Z-axis
down until the tip of the probe is inside the bore and not touching anything.
STEP 3: From the main screen, press <F1-Setup>, then <F1-part>, then <F5-Probing>, Enter
0.00 in the field provided for probe stylus diameter and press enter, then <F1-Bore>,and finally <Cycle
Start>. The control will probe opposing walls of the bore then stop in the center of the bore. A
message box will appear on the screen that will display the measured diameter of the bore. Subtract
this number from the known diameter of the gauge bore. The resulting number will be the calibrated
diameter of the probe stylus tip.
STEP 4: Test the result. press <F5-Probing>, Enter the calibrated probe diameter in the field
provided and press enter, then <F1-Bore>,and finally <Cycle Start>. The control will probe opposing
walls of the bore then stop in the center of the bore. The message box will appear on the screen and will
display the measured bore diameter within +/- 0.0002" if the calibrated tip diameter is correct and the
machine is in good condition. Ad ust tip calibration diameter and repeat as needed.
STEP 5: Go to the Tool Library and enter the calibrated diameter for the probe stylus in the tool#
you assigned to the probe in Parameter 12.
The Probe Stylus Calibration is now complete. Your DP-4 probe is ready for probing and digitizing!
7

PERFORMANCE CHARACTERISTICS
PRE-TRAVEL VARIATION:
Pre-travel is the amount of deflection of the stylus tip before the probe output switches. This value
varies depending on the length of the stylus, speed and direction that the stylus tip is moving relative to
the target surface when it makes contact. Pre-travel variation amount should be stated in probe
specifications relative to stylus length and direction of travel limitations. A probe that has small pre-
travel variation with no restriction on stylus length and direction of travel will be quite expensive.
Machine characteristics including lash and input latency also contribute to pre-travel variation. Pre-
travel variation errors can be easily avoided by always orienting the probe the same way and taking
data in the same directions and speed. The pre-travel then becomes a constant and can be accounted for
in the calibration procedures then accuracy becomes dependent on repeatability.
PRE-TRAVE VARIATION, RADIA DIGITIZING PRECISION BORE
Typical pre-travel variation for DP-4 probe showing variation over 720 degrees of
radial digitizing routine of precision bore. Inside circle represents the
minimum value and the outside circle the maximum. Data was collected
probing at 1 inch per minute with a 43mm long stylus.
UNIDIRECTIONAL REPEATABILITY:
This specification indicates a 95% confidence level that repeated measurements will not vary more than
+/- the stated amount (standard deviation at 2 sigma level). The stated amount only applies to repeated
measurements in the same direction and speed. Machine characteristics can drastically reduce the
confidence level in this specification. A probe installed on a CMM has a much better chance of
producing the stated tolerance than one installed on a mill since the machine errors add to the probe
error. That said, mill installations can still produce results well within the tolerances allowed for
machining if the mill is kept in good operating condition.
8

MAINTENANCE AND CARE
Do not submerge or expose the DP-4 to liquids. Wipe off any liquids immediately to prevent internal
contamination or degradation of the rubber seal and indicator lens. Do not use compressed air to clean
the probe as this will force conaminants past the seals. The probe body is stainless steel and should
only be wiped clean with compatible cleaners.
Storage. When not in use, store the probe in a vertical or inverted vertical position, not on its side. This
minimizes stress on internal mechanical parts and distributes lubrication more evenly. Do not ship or
store the probe with the stylus mount boss pushed into the probe body as this will negatively affect
internal lubrication.
User repa rs. The DP-4 has no internal user serviceable parts or ad ustments and should only be
serviced by Centroid.
Al gnment adjustments. Regularly check alignment. Any time the probe is removed from its holder,
the stylus is changed or the probe is used in a different machine, the alignment procedure should be
repeated to ensure accuracy. The user should also repeat the alignment procedure if the unit is dropped
or receives any sudden external shock. It is good practice to periodically check alignment for quality
control and to establish a base line maintenance schedule. See "Stylus Installation and Alignment
Procedures" section. If the probe stylus can not be dialed-in or aligned then the probe should be sent in
for evaluation and repair.
Prob ng errors may be caused by many factors. If the errors are random in nature check surface
condition of stylus tip and probed surface, keep both clean also, check condition of probe cable. If the
errors are consistent and repeatable check that parameters are set correctly for speed and clearance.
Also check that machine backlash or other parameters have not changed. If the probe indicator LED
stays red when the stylus is not touching a surface, gently move the stylus by hand within it's over-
travel limits. This will re-distribute lube and spring pressure. If the probe indicator LED contiues to
stay red the probe may be damaged and must be returned for evaluation and repair. The DP-4 has no
internal user serviceable parts or ad ustments and should only be serviced by Centroid.
SHIPPING INSTURCTIONS
Contact Centroid Technical Support at 1-814-353-9290 for a description of the return policy and
assistance in determining if return is necessary, before sending your probe back.
If the probe must be shipped it should be removed from the tool holder and the stylus must be removed
from the probe. Use the original plastic shipping tube and insert the probe in the tube with the stylus
mount boss located inside the foam ring in the tube. The foam should prevent the stylus mount boss
from touching the end of the plastic tube if arred during shipping. Do not ship or store the probe with
the stylus mount boss pushed into the probe body as this will negatively affect internal lubrication.
9

10
DP-4 PROBE KIT CONTENTS
2.5mm Ruby tip stylus
M3 thread 40mmlength p/n: 3357
Stylus tightening pin p/n: 2903
Precision ring gauge p/n: 3193
Size and type may vary
5mm Ruby tip stylus
M3 thread 40mmlength p/n: 3360
3/32” hex wrench p/n: 2898
DP-4 Probe complete kit with protective case
and accessories. Inset shows outside of case.
Kit contains the accessories shown above
plus the retractile coil cord p/n: 10394.
Complete kit p/n: 10405
3/16” wrench p/n: 2902

COMMON CABLES:
The photo below shows the DP-4 connected to the primary cable assemblies common to all new
Centroid control installations. Note the bulkhead connector to provide physical support for the coil
cord. No additional adapters are needed for new Centroid (TM) systems. See the appropriate appendix
in this manual for additional required adapters, connection diagrams and parameter settings for your
installation.
11
Probe Cable P/N:11085
Internal w r ng harness w th fuse
holder and bulkhead connector to
mate w th COIL CORD. COIL CORD
P/N: 10394
DP-4 Probe shown connected to retractile coil cord and internal
wiring harness with bulkhead connector and fuse holder.

CONNECTION DIAGRAM UNIVERSAL
This diagram provides the basic function of each pin in the DP-4 electrical connector and is the starting
point for interfacing the DP-4 to non-Centroid control systems or trouble-shooting existing systems.
The COIL CORD pinout and internal wire colors are also presented to facilitate installing custom
connectors for non-Centroid systems. The connections can be summarized as follows:
1) Power: DC voltage supply, positive terminal connected to pin 2, negative to pin 5.
2) Signal: Current sinking type, pin 3 appears connected to pin 5 when signal is active. Pin 3 appears
unconnected when signal is not active. Pin 3 voltage is limited to 0V to +60VDC Maximim relative to
pin 5. Pin 5 is common to both signal and power therefore signal circuit to pin 3 must be carefully
planned to avoid damaging the probe.
3) Supervision: A supervision circuit loop using pin 4 and pin 5 provides an indication that the probe
has been connected. This circuit detects that the probe has been connected.
12

GRID DIGITIZING TIPS
Digitizing is, by its nature, a slow, precise process. The time it takes to digitize a part is effected by
four factors: feedrate, step size, detail density and over-all shape of the ob ect.
The feedrate settings in parameters 14 and 15, (the fast and slow probing rates). As a general rule of
thumb parameter 14 should be set to 20 or 30ipm for digitizing and probing. This setting will not affect
the accuracy of the digitizing data, but will speed up the approach cycles during the digitizing run and
there by reduce the time the run takes. Parameter 15 however does have a direct effect on the accuracy
of the digitizing data and should be ad usted to match the tolerances you are calling out for the finished
part. Typically setting this parameter slower will yield more accuracy and faster less accuracy.
The accuracy achieved on vertical surfaces is also dependent on stylus length and related PTV (pre-
travel variation) for the probe being used. If vertical surface accuracy greater than the PTV value is
needed then a probe with appropriate PTV is required such as the DP-7.
If your part does not require very close tolerances then ad usting these probing rates could save you a
significant amount of time, but if you set the feedrate too high the results you get may not meet your
requirements and you will ust be wasting time. So start off cautiously, it is better to take a little longer
when you are first starting out. Once you have several digitizing runs under your belt, you will have a
much better feel for where these parameters need to be set to achieve the results to meet your ob
requirements.
The X, Y, and Z stepover – The smaller the stepover distance, the longer the digitizing run. For
instance the typical time it takes to digitize a 1” by 1” grid with a step over of .010” in X, and .010” in
Y, (with parameters 14 and 15 set to 30ipm and 5ipm respectively), is 45 minutes with 10,000 data
points being recorded. By changing the X stepover to 0.005” and the Y stepover to 0.005” the time
increases to 3 hours with the number of data points recorded increasing to 40,000. The trade off with
time, is surface finish and detail. The finer the stepover amount in the digitizing run the better the
surface finish is going to be in the final part and the more fine detail you will be able to capture. As the
end user, it is up to you to find the settings that give you the finish, and detail level you are looking for
in the final part.
Remember, the Centroid control can digitize unattended, 24 hours a day, 7 days a week, if you really
need the detail and finish, ( ust remember to fill the automatic oiler tank!).
The third factor that affects the time it takes to digitize a part is the density and height of the surface
detail. The more vertical walls the probe stylus must climb, up and down over, the longer the digitizing
will take. This is not a factor you have much control over, except for ad usting your Z stepup distance,
but in general this will have little effect.
Finally, if the piece is odd shaped, you may want to patch several small digitizing runs together and
there by eliminate the wasted time that would be spent moving over areas that are not pertinent to the
data you want to collect.
13

CUTTING COPY OF DIGITIZED PART TIPS:
The following are some tips on using the data from your completed grid digitizing run. The
nomenclature, procedures and programs used are consistent with the Centroid(TM) operators manual.
Consult your operator's manual for equivalent.
When you are ready to cut a copy of the part you have digitized, set your part up using the same X, Y,
and Z coordinate you used to digitize the part. The digitizing program does not put in the M codes and
spindle speed setting. You must either turn the spindle on manually or edit the G-code file and insert
this information. Simply insert a line at the beginning of the program that contains M3 (spindle
clockwise) or M4 ( spindle counter clockwise) followed by an S with the speed you want to turn the
spindle at.
The following is an example: M3 S4000
This will turn the spindle on going clockwise at 4000 RPM. To turn the spindle off when the program
finishes put a M5 at the end of the program.
You can also use the text editor to turn coolant on and off by adding, M7 (MIST), or M8 (FLOOD) at
the beginning of the program, and M9 (COOLANT OFF) at the end. Remember you can have only
one-M code per line in the program.
To enlarge, shrink or mirror your part, you can use the G51 (turns on scaling) and G50 (turns off
scaling) commands, (refer to your user manual for the complete description and definition of these G
code commands). When enlarging or shrinking your part using the G51 command remember you must
scale the size of the cutter you are going to use to cut the part by the same factor that you use to scale
your part. For instance if you digitized a part with a 0.25” stylus and scale the part up by 2 then the
cutter needed to cut the part would be a 0.5” diameter cutter. Conversely if you scale the part by ½
then the cutter diameter needed would be 0.125”.
You can also import your digitized data into an online CAM program on your Centroid control or
export it to an offline CAM system. The “Dig to CAD” menu in the Digitizing screen is used to convert
the digitized data to a format that can be used by the CAM programs.
14

APPENDIX A
CENTROID CNC12 PROBE CONFIGURATION
(see control manual for additional information)
CNC12 control system parameter recommended asic settings SAE inch (mm)
Parameter Setting Description
11 50769 PLC input, probe signal
12 10 ool library number for probe
13 0.020 (0.508) Clearance amount nominal
14 30 (762) Fast Probing Rate
15 3 (76.2) Slow Probing Rate
16 5 (127) Maximum Search Distance
18 50771 PLC input, Spindle Inhibit/probe connected
120 0.020 (0.508) Probe stuck clearance amount
121 0.020 (0.508) Grid digitizing minimum Z pullback
122 0.0002 (0.005) Grid digitizing dead band distance
123 0 Radial clearance move
151 0 Repeatability tolerance
153 1 Probe protection enable
155 0 Probe type enable
186 1 Probe stuck retry disable
366 1 Probe Deceleration Multiplier
Pro e Jog Parameters control jog speed when probe is connected. Probe must decelerate to stop when
contacting a surface without exceeding overtravel limits. See probe sepcifications. Probe will be
damaged if over travel limit is exceeded by any amount.
Axis Pro e Slow Jog Pro e Fast Jog(-) Pro e Fast Jog(+)
1 25 150 150
2 25 150 150
3 25 75 150
4 25 100 100
Note: In this example axis 3 is the Z axis which only has 0.150 inches of overtravel limit in the (-)
direction. Axis 4 is a rotary axis overtravel will depend on distance from center of rotation.
REQUIRED CONNECTION CABLE CNC12 SYSTEMS
Probe Cable PN: 11085 is used on most CNC12 systems. See the schematic diagram of this cable in
appendix B. Refer to the installation manual of the control if this cable is not appropriate.

APPENDIX B
CENTROID CNC11 PROBE CONFIGURATION
(see control manual for additional information)
CNC11 control system parameter recommended bas c sett ngs SAE nch (mm)
Parameter Setting Description
11 50769 PLC probe input number
1 10 Tool library number for probe
13 0.0 0 (0.508) Clearance amount nominal
14 30 (76 ) Fast Probing Rate
15 3 (76. ) Slow Probing Rate
16 5 (1 7) Maximum Search Distance
18 50771 PLC input, Probe Detect, Spindle Inhibit
1 0 0.0 0 (0.508) Probe stuck clearance amount
1 1 0.0 0 (0.508) Grid digitizing minimum Z pullback
1 0.000 (0.005) Grid digitizing dead band distance
1 3 0 Radial clearance move
151 0 Repeatability tolerance
155 0 Probe type enable
186 1 Probe stuck retry disable
366 1 Probe Deceleration Multiplier
REQUIRED CONNECTION CABLE CNC11 SYSTEMS
10 pin rectangular connector plugs into “PROBE” connector on CNC11 systems.

APPENDIX C
CENTROID CNC10 PROBE CONFIGURATION
(see control manual for additional information)
CNC10 control system parameter recommended asic settings SAE inch (mm)
Parameter Setting Description
3 0 Modal Tool and Height Offset Control
10 0 Enables decel on probe contact
11 14 LC probe input number
12 10 Tool library number for probe
13 0.020 (0.508) Clearance amount nominal
14 30 (762) Fast robing Rate
15 3 (76.2) Slow robing Rate
16 5 (127) Maximum Search Distance
18 15 LC input, robe Detect, Spindle Inhibit
120 0.020 (0.508) robe stuck clearance amount
121 0.020 (0.508) Grid digitizing minimum Z pullback
122 0.0002 (0.005) Grid digitizing dead band distance
123 0 Radial clearance move
151 0 Repeatability tolerance
155 0 robe type enable
186 0 robe stuck retry disable
366 1 robe Deceleration Multiplier
REQUIRED CONNECTION CABLE CNC10 SYSTEMS AND EARLIER
Flying lead cable, wires to LC and power terminals. Assembly 10209