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Introduction

This  manual  update  covers  errors  occurring  on 

Pages 36-41

 in the manual for Models H6091-94 

and H7848-51 Digital Read Outs (DRO).

Page 36

Please note that the positive and negative assign-
ments are labeled incorrectly in the figures at the 
top of 

Page 36

Figure 1 

shows the proper assign-

ments  that  must  be  used  when  planning  coordinate 
motions.

MANUAL UPDATE

MODELS H6091-94

H7848-51

Figure 1. 

The positive and negative values listed in the manual are incorrect.

COPYRIGHT © APRIL, 2005 BY GRIZZLY INDUSTRIAL, INC. REVISED FEBRUARY, 2007

WARNING: NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE

 OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC.

 #DD7183 PRINTED IN CHINA

The value of -20 has been changed for Z and the 
start point for X has changed to -20 while the end 
points for X and Z have changed to -40 and -20 
respectively, in both 

Example 3

 and 

4

. The coor-

dinate star in 

Figure 1

 has also been updated to 

show the actual positive and negative values that 
will be viewed on the display, when operating the 
DRO.

controls the motion assignments 
for X and Y (depending on which 
plane is chosen). As an example, 
when a curve is to be generated 
in  the  XZ  plane,  all  motion  of  X 
is dictated by Z. As Z is lowered, 
the  display  for  X  on  the  DRO 
changes as well. 

The  user  chooses  how  much 
the  step  rate  will  be  in  Z.  He  is 
given  the  amount  that  X  must 
move to be in the right place for 
the next cut each time Z moves. 
The  operator  moves  the  table 
until  the  display  reads  0.000  for 
X; the cut can then be made. In 
this  way,  no  matter  how  deep  Z 
is set, as long as X reads 0.000, 
the table is in the correct location 
in X and Z, to make a cut along 
the edge of the curve.

Page 37

Step 8

 lists Machining Step Increment. This fea-

ture is only used on 2 axis DROs. The Z Step

Summary of Contents for H6087

Page 1: ... the end points for X and Z have changed to 40 and 20 respectively in both Example 3 and 4 The coor dinate star in Figure 1 has also been updated to show the actual positive and negative values that will be viewed on the display when operating the DRO controls the motion assignments for X and Y depending on which plane is chosen As an example when a curve is to be generated in the XZ plane all mot...

Page 2: ...t the corner be removed if possible to help minimize the depth of cut Otherwise the step over rate will have to be greatly reduced for safety slowing the production rate To machine a radius in the XZ plane using the R function do these steps 1 Move the milling table so the center of the spindle is located at the Zero Position indicat ed in Figure 2 in X and Y Mount the 6mm ball end mill into the s...

Page 3: ... prompt you for the radius information Type 20 and then press the Enter key Press the Next key 8 The display will prompt you for the Start Point information Press the X key and type in 20 Press the Enter key Press the Z key and type in 0 Press the Enter key Press the Next key Figure 4 Input the center point information here Figure 5 Input the radius amount here Figure 6 Input the start point infor...

Page 4: ...will prompt you for the Tool Diameter Type in 6 and press the Enter key Press the Next key 11 The display will prompt you for the R or R radius information Press the Next key to toggle between these choices Select R Tool and press the Enter key Press the Next key Figure 7 Input the end point information here Figure 8 Input the tool diameter here Figure 9 Choose a positive or negative radius here ...

Page 5: ...80 mm Notice how the display changes for X as Z moves 4 Move the table in X until the display reads X of 0 000 5 Turn on the spindle and make a pass the required length in Y Return the table to Y of 4 000 when finished 6 Lower the quill another 0 080 mm 7 Move the table in X until the display reads 0 000 8 Make a pass in Y Return the table to Y of 4 000 mm when finished Steps 6 8 are repeated unti...

Page 6: ... H6087 H6098 INSTALLATION MANUAL COPYRIGHT JUNE 2004 BY GRIZZLY INDUSTRIAL INC WARNING NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL INC CA6351 PRINTED IN CHINA ...

Page 7: ...s wherever possible In the case where there are no machined flat surfaces available on the machine machined flat blocks or the aluminum fillers should be used Wherever possible the scale ends and the machine reader head should be installed on a flat surface 3 Indicators must be set up properly to ensure accurate measurement Make sure indicator axis is perpendicular to the work If a vertical dial i...

Page 8: ...as short as possible to provide a rigid surface Figure 5 Mounting strip 4 A clearance of at least 1 8 between the scale and scale cover is necessary Figure 6 1 8 1 8 Scale Cover Scale Mounted Scale Cover Figure 6 Scale cover clearance 5 All tapped screw holes must have at least six threads to allow the screw to be firmly secured For the screw that is needed to secure a heavy load the tapped holes ...

Page 9: ...ignment measurements Installation Requirements 1 Requirements for the mounting surface Parallel mounting Figure 9 10 The par allelism of the two mounting surfaces must be less than 0 1 mm of each other Perpendicular mounting Figure 11 The two mounting surfaces must be less than 0 1 mm out of square 1 004 004 002 0 008 709 008 Figure 9 Parallel mounting Figure 10 More parallel mounting 4 Digital Re...

Page 10: ... between the scale and the machine slide must be less than 04 as shown in Figure 12 For scale travel longer than 37 4 mm Figure 13 the maximum alignment paral lelism error must be less than 0 06 04 06 06 Figure 12 Alignment less than 37 4 travel Figure 13 Alignment more than 37 4 travel Digital Readout System 5 ...

Page 11: ...otection at all times the scale should be mounted with the rubber seals facing down Where extreme exposure to metal shavings coolant dirt and compressed air are present install the sup plied sheet metal cover guards for maximum protection Between the scale and the reader head is a blue strip which helps to maintain the correct distance between the reader head and the scale Remove this after instal...

Page 12: ...is parallel with the machine slide with a dial indicator 4 When the scale is mounted fix the reader head to the saddle If necessary shim the head to ensure that it is parallel and in line with the scales Figure 17 NOTE The blue packing between the reader head and scale allows for the correct clearance and holds the reader head parallel to the scale Figure 16 Mounting scale on backing plate Figure ...

Page 13: ...de of the scale is away from the direct metal shavings and coolant and that the travel is in the right direction towards the spindle and away from the spindle The bracket should be mounted on the knee Figure 21 and around the scale to allow for the cover to protect the scale Figure 22 where exces sive coolant and metal shavings are present 3 After the scale is aligned to the axis drill and tap the...

Page 14: ...le shown in Figure 24 Figure 24 Flat surface for scale mounting 3 The longitudal scale should be mounted on the back of the lathe Figure 25 with the open side of the scale facing down and must be parallel to the bed Figure 25 Longitudal scale mounting on lathe 4 Mount the reader head to the saddle with the provided brackets Figure 26 Modification may be required for some lathes Mount cov ers over ...

Page 15: ... 10 Digital Readout System ...

Page 16: ......

Page 17: ...zly Trusted Proven and a Great Value OR SECURE ORDERING ORDERS SHIPPED WITHIN 24 HOURS E MAIL RESPONSE WITHIN ONE HOUR Visit Our Website Today And Discover Why Grizzly Is The Industry Leader Call Today For A FREE Full Color Catalog ...

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