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42

 

Troubleshooting

Tr oubleshooting

This Troubleshooting section is intended for use in conjunction with the applicable user manuals. Please follow the troubleshooting steps below and call 
our Tech Support Department with the results.

Problem

Steps to take

Nothing happens 
when the power 
switch is turned 
on (Axis windows 
are blank)

1.

Unplug power to the DP900. Check the fuse.

2.

Test the input voltage to the display unit with a voltmeter.

3.

Disconnect all reader head cables. A defective reader head could prevent the display from powering up.

4.

Connect power and turn the display on. 

 

Did the display power up with encoders disconnected? If so, connect one encoder at a time until the failed encoder has 
been isolated. Be sure the unit is turned off while connecting / disconnecting encoder cables.

Display shows 
‘Signal Fail’ or 
‘No Signal’ in one 
axis

1.

Turn off the display.

2.

Take the reader head cable from the malfunctioning axis and plug it into the other axis of the display.

3.

Turn the display on.

4.

If the scale works properly when connected to the other axis of the display, the source of the fault is the display. The display 
needs to be repaired. 

 

Note: You may need to go to Setup mode and adjust the scale type, radius / diameter and error compensation parameters 
to get accurate readings. The main goal in this step is to identify the source of the signal fail / no signal error.

5.

If the malfunction followed the scale cable to the other axis of the display, the source of the fault is the reader head. Replace 
the reader head.

Signal Fail or No Signal errors cannot be caused by incorrect parameter settings.

Содержание DP900

Страница 1: ...Digital Readout Display DP900 Manual ...

Страница 2: ...tions 7 Setup mode 9 General settings 9 No of axis 9 Sleep mode time min 9 Key beep enable 9 Zero app beep en 9 Zero app tolerance 9 Diagnostics 9 Select axis 10 Machine model 12 Auxiliary setup 12 Set factory settings 12 Applying compensation 12 Error descriptions 12 Calibrate axis 14 Linear compensation 14 Segmented compensation 15 Basic functions 17 Absolute mode 17 Incremental mode 17 Inch and...

Страница 3: ... Probe function 28 Datum axis 28 Linear measurement mode 29 Angle measurement mode 29 Diameter measurement mode 30 Lathe functions 31 Summing 31 Vectoring 31 Taper 32 Zero approach 32 Job timer 32 Generic functions 33 Tools 33 Mill mode 33 Lathe mode 34 Sub datums 36 Creating a job 36 Editing a job 37 Using sub datums 37 Auxiliary function 38 Input 38 Output 39 Troubleshooting 42 Index 44 ...

Страница 4: ...ions that you choose there may also be extra connections for a probe and an auxiliary input output port The mains on off switch is at the rear of the unit see the diagram on page 1 You should always connect the equipotential terminal to the machine ground to ensure that the displays are stable Front Back Numeric keys Slider bar Display screen Navigation keys Function keys Soft keys Power on off Po...

Страница 5: ... operation you were performing General information You enter numeric values using the keypad You use the enter key to confirm your numeric entry and return to the previous screen while saving the parameters You use the ce key to clear your numeric entries and return to the previous screen without saving the parameters The soft key labels show the various functions available You select these by pre...

Страница 6: ...ode without saving or actioning any changes Soft keys General operation The order of the soft keys changes according to whether you have selected Mill or Lathe as your machine model You press the right navigation key to scroll through all the available soft keys Func You use this to display a machine specific functions list This is explained in more detail in Lathe functions Mill functions and Gen...

Страница 7: ...s etc This means that for repetitive jobs there is no need to re enter the data each time Instead you can recall the job from a list Pressing brings up a list of known job programs for that function You use the up and down navigation keys to highlight the required job Delete You use this key to remove programs jobs or tools that you no longer require When you press you are prompted for confirmatio...

Страница 8: ...toggle between Absolute mode and Incremental mode in mm key You use this key to toggle the display units between inches and millimeters Ref key You use the ref key to activate the Digifind feature which you use to recall a previously set reference home position There are two types of reference positions Homing This is the position that was most recently set in absolute mode Machine Reference M C R...

Страница 9: ... enter numbers directly using the numeric keypad Numeric keypad This appears on the right hand side of the DRO You use it to enter numerical values It also has a key to enter positive and negative numbers and a decimal point key to enter decimal values If you enter an incorrect digit you can press the ce to delete each number in turn If you press the ce key when no numbers remain the DRO stops the...

Страница 10: ...umption 20W Operating temperature 0 C to 45 C Storage temperature 20 C to 70 C Relative humidity Max 85 non condensing Dimensions 280mm 180mm 75mm L H D Weight 1 9 Kg Display 5 7 STN type monochrome LCD Model Spherosyn Microsyn TTL DP900211000 X Y DP90031110 DP90031110A X Y Z DP90041111A X Y Z W DP9004111DA X Y Z W Model Spherosyn Microsyn TTL A A B B R R ...

Страница 11: ...Spherosyn Microsyn 2V 1kHz phase analog 360 degrees per ball pitch Phase change of 90 relating to of a pitch or 1 8 inch 3 175 mm for Spherosyn Time Phase Shift Signal Amplitude Received Signal Transmitted drive signal ...

Страница 12: ...ch Beep bars appear under the axis numbers to clearly indicate the direction and relative position of the axis to zero As the beep starts the bars start to shrink towards the centre The bars disappear when the zero position is reached The Zero Approach Beep only beeps when you are within the set approach distance The beep rate gets faster as the zero position is approached The beep is only for the...

Страница 13: ...solution The resolution settings available for the X Y Z and W axes are as follows The exception is the W axis of a DP9004111DA model that you have set to linear type the resolution settings available are 0 1µm 0 2µm 0 5µm 1µm 2µm 5µm 10µm 20µm and 50µm For the X Y and W axes the default value is 5µm For the Z axis the default value is 1µm Axis Direction This parameter defines which reader head mo...

Страница 14: ...inding the CPR value In the automatic process you are prompted to pass two reference marks in the same direction The DRO counts within them and sets the CPR value The default value is 4096 Resolution Deg This parameter defines the Display resolution in degrees The default value is 0 1 degrees Reference Mode This defines which reference mode to select Internal or External For Internal mode the DRO ...

Страница 15: ...med data including programs SDM jobs and segmented scale compensation To return to the factory defaults 1 Press 2 Press to confirm that you want to return to the factory default settings If you decide that you don t want to return to the factory default settings press The default setup settings are Applying compensation You configure any compensation values in the Calibrate Axis setting Performing...

Страница 16: ...r dial indicator and the DRO display If the readings match within the accuracy specificed then you know that the DRO system is operating properly If this is the case you can proceed to the next step evaluating the machine errors If the readings do not match you must repair the DRO system before proceeding with error compensation To evaluate machine errors 1 Put the laser target dial indicator on t...

Страница 17: ...not truly parallel with the encoder scale axis You can overcome this by applying a scaler to the measured axis value before it is displayed You calculate the correction factor and specify it in parts per million ppm The values can be between 9999 and 9999 The DP900 has an automatic facility to calculate the linear error correction scalar All displayed values are in mm regardless of whether the DP9...

Страница 18: ...set one or more axes to Segmented Error Compensation then you need to carry out the following procedure to configure the compensation for each of those axes When you are measuring the values for compensating an axis you must ensure that you do not include the diameter of the probe or tool Identifying the correction parameters The scale travel is broken down into a number of segments that you defin...

Страница 19: ... axis to Segmented Compensation as described in Calibrate axis on page 14 2 Press edit 3 Use the and to move to the segment number that you want to edit 4 Press edit 5 Enter a value for the Observed Value 6 Enter a value for the True Value 7 Press or to return to the previous screen 8 Repeat the procedure for all the segments 9 When you have entered values for all the segments press to save your e...

Страница 20: ...The DP900 has a dedicated key the inch mm key to switch the positional displays between imperial inch and metric mm measurements The current display mode is shown at the top left of the screen as either mm or in Loading an axis In normal operation with the axis values on the screen you can select the mode of axis data operation by pressing This toggles the axis mode legend between SET and ZER When...

Страница 21: ...X axis value 34 540 9 Select Preset set error 0 10 The X axis value 34 540 11 Press and then press the slider bar close to the X axis 12 The X axis value 25 000 preset 25 from last visit 13 Move to 0 050 X axis value 0 050 14 Press and then press the slider bar close to the X axis 15 The X axis value 25 050 error added to preset value of 25 Referencing With the DP900 you can set two different refe...

Страница 22: ...aught absolute axis zero datum position Digital encoder reference If your DP900 is fitted with a 4th axis RS422 quadrature encoder then the reference is taken directly from the scale These encoders can have one or more reference marks and you should be aware of this and where the reference marks are located 1 Press the ref key The soft key menu displays homing and M C ref 2 Select either homing or...

Страница 23: ... Trigonometric Functions sin cos tan sin 1 cos 1 and tan 1 These operate on a single operand This operates on the number in the entry field The result is displayed in the entry field replacing the original number that you entered You can perform other operations on this result The trigonometric functions consider the operands in degrees and not in radians If you want sin 43 14 then you should foll...

Страница 24: ...pattern this key opens a data entry screen so you can select a name for the pattern If you recalled a previously saved pattern then this key saves the changes for that pattern Exits from the Function List The following soft keys may appear depending on the function that you chose Use this to delete a previously saved pattern Use this to copy a previously saved pattern Use this to rename a previous...

Страница 25: ...ole the Ending Angle is removed from the parameter list Line hole This function is used to calculate the locations of holes in a linear pattern It is also known as Linear Bolt Hole The following parameters are required Starting coordinates Pitch distance Angle No of holes Max 99 Depth Plane X Y X Z or Y Z When you have entered all the parameters 1 Press This opens the Data Entry screen 2 Enter a n...

Страница 26: ...urn to the parameters screen 3 Press This opens a graphical display showing the arrangement of the holes You can use and to move around the holes Frame This function is used to calculate the locations of points along the line of a rectangle You use this to mill a rectangular frame The following parameters are required for this function Pattern starting point coordinates Angle Length of side 1 Leng...

Страница 27: ...Tool Setup Machined to Internal External or Center Plane X Y X Z or Y Z When you have entered all the parameters 1 Press This opens the Data Entry screen 2 Enter a name for your pattern and press You return to the parameters screen 3 Press This opens a graphical display showing the arrangement of the holes You can use and to move around the holes R function The R Function is a pre defined arc func...

Страница 28: ...s of the arc The following diagram describes the 8 arc types Pocket This function is similar to Frame function except that the middle portion of the Frame is also milled The parameters required are Pattern starting point coordinates Angle Length of side 1 Length of side 2 Diameter of tool Default value comes from the Tool Setup Maximum cut Machined to Internal External or Center Depth Plane X Y X ...

Страница 29: ...s but in a straight line The parameters required are Pattern starting point coordinates Angle Slot length Diameter of tool Default value comes from the Tool Setup Maximum cut Depth Plane X Y X Z or Y Z When you have entered all the parameters 1 Press This opens the Data Entry screen 2 Enter a name for your pattern and press You return to the parameters screen 3 Press This opens a graphical display...

Страница 30: ... the Z axis and the W axis Turns this mode off This switches the DRO back to the 4 axis display Applies the selected option and exits from the function list Zero approach You use this function to turn the Zero approach bar graphs on or off in normal mode of operation It has the following soft keys Turns the zero approach on Turns the zero approach off Exits from the function list Job timer This is...

Страница 31: ...us diameter is shown It is critical that you enter this information 1 Press the slider bar next to the probe tip diameter display 2 Type in the probe diameter 3 Press enter Datum axis This is the most basic operation of the probe With this you can load an axis loaded with a datum position as determined by a probe touch 1 Press The message window shows Probe Datum 2 Select the required axis by pres...

Страница 32: ...n as per the measurement option 6 Press to go the basic probe window This operation functions in both Incremental and Absolute modes depending on the DRO operating status Angle measurement mode This function can be used to measure angles on the work piece It can also be used to calculate work piece skew angles The Angle Measurement mode has different options Skew operation 1 Press The message wind...

Страница 33: ...alculates the diameter of a circular feature from three points Under this you can choose from the following measurement options Internal diameter measurement External diameter measurement For both the measurement modes use following sequence 1 Press The message window shows Probe diamtr 2 Select mode of operation internal or external 3 The DP900 displays Move to Position 1 Move to first point and ...

Страница 34: ...ithout saving the changes Sets the changes done and exits to the main screen Exits to the main screen without saving the changes When you set a particular axis to sum mode its axis legend changes to S and the summing pair is shown below the axis legend Vectoring You use this function to combine the movement of the X and Z axes with the angle of the compound slide Combined X movement X Z Sinα Combi...

Страница 35: ...ain screen Zero approach You use this function to turn the Zero approach bar graphs on or off in normal mode of operation It has the following soft keys Turns the zero approach on Turns the zero approach off Exits from the function list Job timer This is a timer utility and you can use it to get the time or rate for completing a particular job It has the following soft keys Starts the Job Timer St...

Страница 36: ...before the tool is deleted Edits the tool parameters under the selected tool d base You access the Tool Database or Tap Drill Library using d base It is a reference for standard tools You can also retrieve the required information for a particular tool from the database The tool databases provide the required information on tap sizes and clearance drills in both imperial and metric formats You nav...

Страница 37: ... access the Tool Setup pages press You should see a screen that lists all the previously defined tools It has the following soft keys Creates a new tool setup The Data Entry screen is displayed so you can enter a tool name A maximum of 20 characters is allowed for a tool name Applies the selected tool The information stored under that tool can then be used by the other functions When you apply a s...

Страница 38: ... can replace it and calculate a new set of offsets using the above procedure Example To set the machine datums 1 Place a piece of bar stock in the chuck and turn using a selected tool 2 Measure the diameter of the bar Do not move the axis 3 Enter this diameter on the X axis The centerline is now 0 000 4 Move the tool to the end of the bar and touch or skim 5 Set the Z axis position to zero 0 000 C...

Страница 39: ... datums Here a job is a group of sub datums for a particular job You can give each job a 20 character name which is stored in the permanent memory Creating a job 1 Press 2 From the Sub Datum selection screen press This opens a new sub datum job 3 Press 4 You can either enter the axis co ordinates using the axis load or move the axes to the required position To use axis load Press the slider bar cl...

Страница 40: ...b datums for each job 2 Use the up and down navigation to select a job 3 Press The information bar shows SDM It also shows current step total number of steps The DP900 is now in SDM graphical mode 4 Use to go to the next step Use to back up a step 5 You can either enter the axis coordinates using axis load or move the axis to the required position To use axis load Press the slider bar close to the...

Страница 41: ...ut Specifications Maximum Voltage V max 30V DC Maximum Current I max 150mA Input You need to allocate an input for each axis You configure these as Pin No Description Pin No Description 1 9 2 10 3 11 4 Ext GND 12 Output 4 5 Input 4 13 Output 3 6 Input 3 14 Output 2 7 Input 2 15 Output 1 8 Input 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Axis Input Options Available X 1 Off Reset X Y 2 Off Reset Y Z 3 O...

Страница 42: ... stored in memory Single axis operation In this mode the outputs are all used by the positions set for a selected axis So for single axis operation any one axis can be configured for this operation You can use pos to set a particular axis to operate as a single output mode The following diagram explains its operation in detail Multiple axis operation In this mode you assign each output line to an ...

Страница 43: ...Position and Pulse width for individual axes using set You can turn off each position status if a particular output is not required Aux output example circuit In this example the Auxiliary Connector is used to drive an external relay Relay Manufacturer Omron Part MK2PNS24DC Contact Form DPDT Coil Voltage Rating 24V DC Maximum Voltage 26 4V Minimum Voltage 19 2V Rated Coil Current 56mA Coil Resista...

Страница 44: ...PLY AUX CONNECTOR SKT NO 4 EXT GND OPTO GND RELAY CONTACT SWITCHES RELAY COIL NOT ACTIVATED OFF TERMINAL 1 TO TERMINAL 4 CLOSED TERMINAL 1 TO TERMINAL 3 OPEN TERMINAL 8 TO TERMINAL 5 CLOSED TERMINAL 8 TO TERMINAL 6 OPEN RELAY COIL NOT ACTIVATED ON TERMINAL 1 TO TERMINAL 4 OPEN TERMINAL 1 TO TERMINAL 3 CLOSED TERMINAL 8 TO TERMINAL 5 OPEN TERMINAL 8 TO TERMINAL 6 CLOSED ...

Страница 45: ...been isolated Be sure the unit is turned off while connecting disconnecting encoder cables Display shows Signal Fail or No Signal in one axis 1 Turn off the display 2 Take the reader head cable from the malfunctioning axis and plug it into the other axis of the display 3 Turn the display on 4 If the scale works properly when connected to the other axis of the display the source of the fault is the...

Страница 46: ...he fault is the display The display needs to be repaired 5 If the malfunction followed the cable to the other axis the source of the fault is the reader head and scale assembly If this is the case proceed to the next step 6 Check for any physical damage to the reader head and cable 7 Check the reader head for proper alignment It must be aligned within 002 on each side Refer to the installation man...

Страница 47: ...t down 4 Contrast up 4 Copy 4 Corner angle operation 30 D D base 4 33 Delete 4 Display resolution 10 Distance to go 3 Done 4 E Encoder diagnostic 9 External 30 External diameter measurement 30 F Func 3 H Half Function 3 I Incremental mode 5 Internal diameter measurement 30 K Keyboard diagnostic 9 L Linear compensation 14 Lower 5 M Machine reference 10 Multiple axis operation 39 N New 4 Next 5 ...

Страница 48: ...4 S Save 4 Scale resolution 10 Scale type 10 Segmented compensation 15 Select 4 Set Zero 3 Setup 4 Single axis operation 39 Skew operation 29 Sub datums 3 adding steps 37 deleting steps 37 editing coordinates 37 T Tap drill library 33 Tool database 33 Tools 3 U Upper 5 W Way errors 13 Z Zero app distance 11 ...

Страница 49: ...eicester LE18 4XH UK Tel 44 0 116 264 2730 Fax 44 0 116 264 2731 Email sales newall co uk Web www newall com Newall Electronics Inc 1778 Dividend Drive Columbus Ohio OH 43228 USA Tel 1 614 771 0213 Fax 1 614 771 0219 Email sales newall com Web www newall com Part No 023 81150 UK 1 ...

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