Grizzly G0875 User manual

MODEL G0875
7" X 24" ENCLOSED CNC MILL
OWNER'S MANUAL
(For models manufactured since 3/19)

This manual provides critical safety instructions on the proper setup,
operation, maintenance, and service of this machine/tool. Save this
document, refer to it often, and use it to instruct other operators.
Failure to read, understand and follow the instructions in this manual
may result in fire or serious personal injury—including amputation,
electrocution, or death.
The owner of this machine/tool is solely responsible for its safe use.
This responsibility includes but is not limited to proper installation in
a safe environment, personnel training and usage authorization,
proper inspection and maintenance, manual availability and compre-
hension, application of safety devices, cutting/sanding/grinding tool
integrity, and the usage of personal protective equipment.
The manufacturer will not be held liable for injury or property damage
from negligence, improper training, machine modifications or misuse.
Some dust created by power sanding, sawing, grinding, drilling, and
other construction activities contains chemicals known to the State
of California to cause cancer, birth defects or other reproductive
harm. Some examples of these chemicals are:
• Lead from lead-based paints.
• Crystalline silica from bricks, cement and other masonry products.
• Arsenic and chromium from chemically-treated lumber.
Your risk from these exposures varies, depending on how often you
do this type of work. To reduce your exposure to these chemicals:
Work in a well ventilated area, and work with approved safety equip-
ment, such as those dust masks that are specially designed to filter
out microscopic particles.

Table of Contents
1 Safety
1.1Safety instructions for machinery ................... 5
1.2 Additional safety for CNC mills/lathes ............ 7
1.3 Safety instructions (warning notes) ................. 8
1.4 Intended use ............ ....................................... 9
1.5 Reasonably foreseeable misuse ..................... 10
1.6 Possible dangers w/CNC machines ............... 10
1.7Qualification of personnel ............................... 11
1.8 User positions ................................................ 13
1.9 Safety devices ............................................... 13
1.10 Safety check .................................................. 15
1.11Safety during operation ................................ 16
1.12 Safety during maintenance ............................. 17
1.13 Disconnecting/securing CNC machine .......... 17
1.14Unattended operation .................................... 18
1.15Accident report ................................................ 18
1.16Electronics ..................................................... 18
1.17Inspection deadlines ....................................... 19
1.18Clamping devices ................................. 19
0.1Machine data sheet ........................................ 3
2.1 Availability ...................................................... 20
2.2 Full-load current rating ................................... 20
2.3 Circuit information .......................................... 20
2.4 Circuit requirements for 220V ........................ 20
2.5 Connection type ............................................. 21
2.6Grounding instructions ................................... 21
2.7 Extension cords .............................................. 21
3.1 Scope of delivery ............................................ 22
3.2 Transport ........................................................ 22
3.3 Setup and assembly ....................................... 24
3.4 Installation plan .............................................. 26
3.5 Corrosion protection ....................................... 28
3.6 Electrical connection ....................................... 28
3.7 Refill coolant ................................................... 28
3.8 Refill central lubrication system ...................... 30
2 Power supply
3 Assembly and commissioning
5.1 Compensation of geometry ............................ 48
5.2 Coordinate systems on CNC machin es ......... 48
5.3 NC mathematics ............................................. 51
5.4 Trigonometric functions .................................. 52
5 General information about CNC
4.1 Screen arrangement ...... ................................. 33
4.2 Operating elements on the PPU ..................... 34
4.3 Elements on the MCP .................................... 39
4.4 Protection levels ............................................. 44
4 User interface, machine control panel
1.19Environmental protection ........................ 19
3.9 Warming up the machine ................................ 32
6.1Safety .......................................................... 53
6.2 Control and indicating elements ................. 53
6.3 Operational modes ...................................... 54
6.4 Programming ............
.................................... 54
6.5 Operation of the machine
............................ 55
6.6 Inserting tool ............................................... 60
6.7 Switching off CNC machine ........................ 60
6.8 Operational modes ...................................... 60
6.9 Programming ............................................. 60
6.10 Starting the program .................................. 61
6.11Central lubrication system ......................... 61
6.12 Data interfaces and current collection
........ 62
8.1 M-function for milling machines .................. 235
8.2 G functions to PAL ...................................... 237
6.13 Selecting the speed ................................... 62
Preparation ................................................. 65
Switch on and referencing .......................... 71
Tool Setup .................................................. 75
Workpiece setup ......................................... 91
7.1
7.2
7.3
7.4
Create part program: part 1
........................ 100
Create part program: part 2 ........................ 116
Simulate program ....................................... 141
Test program .............................................. 145
7.5
7.6
7.7
7.8
Machine pieces
.......................................... 149
Program restart ........................................... 155
Additional information: part 1 ..................... 159
Additional information: part 2 ...................... 179
7.9
7.10
7.11
7.12
Sample program
......................................... 197
ISO mode .................................................... 210
Appendix .................................................... 229
7.13
7.14
7.15
10
Maintenance
Operating material ...................................... 242
10.1
Safety .......................................................... 243
10.2
Inspection and maintenance ....................... 244
10.3
Polycarbonate windows .............................. 246
10.4
Sliding door interlock switch ........................ 247
10.5
Drain the compressed air service unit ......... 247
10.6
Recommended wearing parts ..................... 247
10.7
Cooling lubricants and tanks ....................... 248
10.8
9
Notes, messages and error messages .......... 238
8M - code list, M functions
7Brief instructions for 808D milling
6Operation

Table of Contents (Cont.)
Housing
........................................................ 253
Stand .......................................................... 254
Base ........................................................... 255
Column ........................................................ 256
12
Parts
12.1
12.2
12.3
12.4
13
Warranty & returns
.............................................. 261
Wiring safety instructions ............................ 249
11
Wiring Diagrams
11.1
System wiring diagrams (1-2) ..................... 250
11.2
Handwheel wiring diagram ......................... 252
11.5
X/Y/Z motors wiring diagram ...................... 252
11.4
System wiring diagrams (3-4) ..................... 251
11.3
Milling head ................................................. 257
Milling table ................................................ 258
Pneumatic system ..................................... 259
Labels & cosmetics ..................................... 260
12.5
12.6
12.7
12.8

Model G0875 (Mfd. Since 3/19) -3-
Page 1 of 3Model G0875
MODEL G0875 7" X 24" ENCLOSED CNC MILL
Customer Service #: [phone] · To Order Call: [phone] · Fax #: [phone]
Product Dimensions:
Weight .........................................................................................................................................................................1190 lbs.
Width (side-to-side) x Depth (front-to-back) x Height .......................................................................................65 x 42 x 78 in.
Footprint (Length/Width) ............................................................................................................................................65 x 68 in.
Shipping Dimensions:
Type ........................................................................................................................................................................ Wood Crate
Content .......................................................................................................................................................................... Machine
Weight ..........................................................................................................................................................................1320 lbs.
Length x Width x Height ...............................................................................................................................71-1/2 x 46 x 85 in.
Must Ship Upright .................................................................................................................................................................Yes
Electrical:
Power Requirement ................................................................................................................................ 220V, 3-Phase, 60 Hz
Full-Load Current Rating ................................................................................................................................................... 11.8A
Minimum Circuit Size ........................................................................................................................................................... 15A
Connection Type .........................................................................................................Permanent (Hardwire to Shutoff Switch)
Power Cord Gauge ....................................................................................................................................................... 14 AWG
Motor:
Spindle
Horsepower ............................................................................................................................................................1.5 HP
Phase .......................................................................................................................................................... Single-Phase
Amps ......................................................................................................................................................................... 5.1A
Speed ...............................................................................................................................................................3000 RPM
Type ................................................................................................................................................................... DC Brush
Power Transfer .................................................................................................................................................. Belt Drive
Bearings ................................................................................................................... Shielded & Permanently Lubricated
X-Axis
Horsepower ...............................................................................................................................................................1 HP
Phase .................................................................................................................................................................. 3-Phase
Amps ......................................................................................................................................................................... 2.1A
Speed ...............................................................................................................................................................3000 RPM
Type ......................................................................................................................................................................... Servo
Power Transfer ...............................................................................................................................................Direct Drive
Bearings ......................................................................................................................Sealed & Permanently Lubricated
Y-Axis
Horsepower ...............................................................................................................................................................1 HP
Phase .................................................................................................................................................................. 3-Phase
Amps ......................................................................................................................................................................... 2.1A
Speed ...............................................................................................................................................................3000 RPM
Type ......................................................................................................................................................................... Servo
Power Transfer ...............................................................................................................................................Direct Drive
Bearings ......................................................................................................................Sealed & Permanently Lubricated

-4- Model G0875 (Mfd. Since 3/19)
Model G0875Page 2 of 3
Z-Axis
Horsepower ...............................................................................................................................................................1 HP
Phase .................................................................................................................................................................. 3-Phase
Amps ......................................................................................................................................................................... 2.1A
Speed ...............................................................................................................................................................3000 RPM
Type ......................................................................................................................................................................... Servo
Power Transfer ...............................................................................................................................................Direct Drive
Bearings ......................................................................................................................Sealed & Permanently Lubricated
Coolant Pump
Horsepower ........................................................................................................................................................ 37 Watts
Phase .......................................................................................................................................................... Single-Phase
Amps ......................................................................................................................................................................... 0.4A
Speed ...............................................................................................................................................................2800 RPM
Type ..........................................................................................................................................................TEFC Induction
Power Transfer ...............................................................................................................................................Direct Drive
Bearings ................................................................................................................... Shielded & Permanently Lubricated
Main Specifications:
Operation Information
Max Distance Spindle to Column .........................................................................................................................7-3/4 in.
Max Distance Spindle to Table ................................................................................................................................11 in.
Longitudinal Table Travel (X-Axis) ...........................................................................................................................14 in.
Cross Table Travel (Y-Axis) .......................................................................................................................................6 in.
Vertical Head Travel (Z-Axis) .....................................................................................................................................9 in.
Position Resolution ........................................................................................................................
± 0.002 in. (0.050mm)
Repeat Position Resolution ........................................................................................................... ± 0.002 in. (0.050mm)
Table Info
Table Length ......................................................................................................................................................24-3/8 in.
Table Width ................................................................................................................................................................7 in.
Table Thickness .................................................................................................................................................1-5/16 in.
Table Height (from Floor/Base) ................................................................................................................................45 in.
Table Weight Capacity ...........................................................................................................................................66 lbs.
Number of T-Slots ...........................................................................................................................................................3
T-Slot Size .............................................................................................................................................................7/16 in.
T-Slots Centers ..........................................................................................................................................................2 in.
X-Axis Rapid Feed Rate ...................................................................................................................................... 240 IPM
Y-Axis Rapid Feed Rate ...................................................................................................................................... 240 IPM
Z-Axis Rapid Feed Rate ...................................................................................................................................... 240 IPM
Spindle Info
Spindle Taper ........................................................................................................................................................... BT30
Pull Stud ..........................................................................................................................................................
BT30 x 45°
Range of Vertical Spindle Speeds ...........................................................................................................
90 - 3000 RPM
Spindle Bearings (Size & Type) ...............................................................................................Angular Contact Bearings
Fluid Capacities
Coolant Capacity ...............................................................................................................................................
5 Gallons
Construction
Spindle Housing/Quill ................................................................................................................................................Steel
Table ................................................................................................................................................................... Cast Iron
Head ................................................................................................................................................................... Cast Iron
Column/Base ...................................................................................................................................................... Cast Iron
Base ................................................................................................................................................................... Cast Iron
Stand .................................................................................................................................................................. Cast Iron
Paint Type/Finish ...................................................................................................................................................Enamel

Model G0875 (Mfd. Since 3/19) -5-
ELECTRICAL EQUIPMENT INJURY RISKS.
You can be shocked, burned, or killed by touching
live electrical components or improperly grounded
machinery. To reduce this risk, only allow qualified
service personnel to do electrical installation or
repair work, and always disconnect power before
accessing or exposing electrical equipment.
DISCONNECT POWER FIRST.
Always discon-
nect machine from power supply BEFORE mak-
ing adjustments, changing tooling, or servicing
machine. This prevents an injury risk from unin-
tended startup or contact with live electrical com-
ponents.
EYE PROTECTION. Always wear ANSI-approved
safety glasses or a face shield when operating or
observing machinery to reduce the risk of eye
injury or blindness from flying particles. Everyday
eyeglasses are NOT approved safety glasses.
OWNER’S MANUAL. Read and understand this
owner’s manual BEFORE using machine.
TRAINED OPERATORS ONLY. Untrained oper-
ators have a higher risk of being hurt or killed.
Only allow trained/supervised people to use this
machine. When machine is not being used, dis-
connect power, remove switch keys, or lock-out
machine to prevent unauthorized use—especially
around children. Make your workshop kid proof!
DANGEROUS ENVIRONMENTS. Do not use
machinery in areas that are wet, cluttered, or have
poor lighting. Operating machinery in these areas
greatly increases the risk of accidents and injury.
MENTAL ALERTNESS REQUIRED. Full mental
alertness is required for safe operation of machin-
ery. Never operate under the influence of drugs or
alcohol, when tired, or when distracted.
For Your Own Safety, Read Instruction
Manual Before Operating This Machine
The purpose of safety symbols is to attract your attention to possible hazardous conditions.
This manual uses a series of symbols and signal words intended to convey the level of impor-
tance of the safety messages. The progression of symbols is described below. Remember that
safety messages by themselves do not eliminate danger and are not a substitute for proper
accident prevention measures. Always use common sense and good judgment.
Indicates a potentially hazardous situation which, if not avoided,
MAY result in minor or moderate injury. It may also be used to alert
against unsafe practices.
Indicates a potentially hazardous situation which, if not avoided,
COULD result in death or serious injury.
Indicates an imminently hazardous situation which, if not avoided,
WILL result in death or serious injury.
Alerts the user to useful information about proper operation of the
machine to avoid machine damage.
NOTICE
Safety Instructions for Machinery
SAFETY

-6- Model G0875 (Mfd. Since 3/19)
WEARING PROPER APPAREL. Do not wear
clothing, apparel or jewelry that can become
entangled in moving parts. Always tie back or
cover long hair. Wear non-slip footwear to reduce
risk of slipping and losing control or accidentally
contacting cutting tool or moving parts.
HAZARDOUS DUST. Dust created by machinery
operations may cause cancer, birth defects, or
long-term respiratory damage. Be aware of dust
hazards associated with each workpiece mate-
rial. Always wear a NIOSH-approved respirator to
reduce your risk.
HEARING PROTECTION. Always wear hear-
ing protection when operating or observing loud
machinery. Extended exposure to this noise
without hearing protection can cause permanent
hearing loss.
REMOVE ADJUSTING TOOLS. Tools left on
machinery can become dangerous projectiles
upon startup. Never leave chuck keys, wrenches,
or any other tools on machine. Always verify
removal before starting!
USE CORRECT TOOL FOR THE JOB. Only use
this tool for its intended purpose—do not force
it or an attachment to do a job for which it was
not designed. Never make unapproved modifica-
tions—modifying tool or using it differently than
intended may result in malfunction or mechanical
failure that can lead to personal injury or death!
AWKWARD POSITIONS. Keep proper footing
and balance at all times when operating machine.
Do not overreach! Avoid awkward hand positions
that make workpiece control difficult or increase
the risk of accidental injury.
CHILDREN & BYSTANDERS. Keep children and
bystanders at a safe distance from the work area.
Stop using machine if they become a distraction.
GUARDS & COVERS. Guards and covers reduce
accidental contact with moving parts or flying
debris. Make sure they are properly installed,
undamaged, and working correctly BEFORE
operating machine.
FORCING MACHINERY. Do not force machine.
It will do the job safer and better at the rate for
which it was designed.
NEVER STAND ON MACHINE. Serious injury
may occur if machine is tipped or if the cutting
tool is unintentionally contacted.
STABLE MACHINE. Unexpected movement dur-
ing operation greatly increases risk of injury or
loss of control. Before starting, verify machine is
stable and mobile base (if used) is locked.
USE RECOMMENDED ACCESSORIES. Consult
this owner’s manual or the manufacturer for rec-
ommended accessories. Using improper acces-
sories will increase the risk of serious injury.
UNATTENDED OPERATION. To reduce the
risk of accidental injury, turn machine OFF and
ensure all moving parts completely stop before
walking away. Never leave machine running
while unattended.
MAINTAIN WITH CARE. Follow all maintenance
instructions and lubrication schedules to keep
machine in good working condition. A machine
that is improperly maintained could malfunction,
leading to serious personal injury or death.
DAMAGED PARTS. Regularly inspect machine
for damaged, loose, or mis-adjusted parts—or
any condition that could affect safe operation.
Immediately repair/replace BEFORE operating
machine. For your own safety, DO NOT operate
machine with damaged parts!
MAINTAIN POWER CORDS. When disconnect-
ing cord-connected machines from power, grab
and pull the plug—NOT the cord. Pulling the cord
may damage the wires inside. Do not handle
cord/plug with wet hands. Avoid cord damage by
keeping it away from heated surfaces, high traffic
areas, harsh chemicals, and wet/damp locations.
EXPERIENCING DIFFICULTIES. If at any time
you experience difficulties performing the intend-
ed operation, stop using the machine! Contact our
Technical Support at [phone].

Model G0875 (Mfd. Since 3/19) -7-
Additional Safety for CNC Mills/Lathes
UNDERSTAND ALL CONTROLS. Make sure
you understand the function and proper use of all
controls before starting. This will help you avoid
making mistakes that result in serious injury.
AVOIDING ENTANGLEMENT. DO NOT wear
loose clothing, gloves, or jewelry, and tie back
long hair. Keep all guards in place and secure.
Always allow spindle to stop on its own. DO NOT
stop spindle using your hand or any other object.
EYE INJURIES. Operator and bystanders MUST
wear ANSI-approved safety glasses to help pro-
tect eyes from thrown metal shards and chips.
USE CORRECT SPINDLE SPEED. Follow rec-
ommended speeds and feeds for each size and
type of cutting tool. This helps avoid tool breakage
during operation and ensures best cutting results.
INSPECT CUTTING TOOL. Inspect cutting tools
for sharpness, chips, or cracks before each use.
Replace dull, chipped, or cracked cutting tools
immediately.
UNATTENDED MACHINE. Operator MUST be
present to immediately stop machine in case of
malfunction to prevent injury to bystanders and
machine damage.
POWER DISRUPTION. In event of power outage
during operation, turn spindle switch OFF to avoid
a possible sudden startup once power is restored.
You can be seriously injured or killed by getting clothing, jewelry, or long hair entangled with
rotating cutter/spindle. You can be severely cut or have fingers amputated from contact with
rotating cutters. You can be blinded or struck by broken cutting tools, metal chips, workpieces,
or adjustment tools thrown from the rotating spindle with great force. To reduce your risk of
serious injury when operating this machine, completely heed and understand the following:
SECURE WORKPIECE TO TABLE. Clamp work-
piece to table or secure in a vise mounted to table,
so workpiece cannot unexpectedly shift or spin
during operation. NEVER hold workpiece by hand
during operation.
DISCONNECT POWER FIRST. To reduce risk of
electrocution or injury from unexpected startup,
make sure mill/drill is turned OFF, disconnected
from power, and all moving parts have come to
a complete stop before changing cutting tools or
starting any inspection, adjustment, or mainte-
nance procedure.
CLEAN MACHINE SAFELY. Metal chips or shav-
ings can be razor sharp. DO NOT clear chips
by hand or compressed air that can force chips
farther into machine—use a brush or vacuum
instead. Never clear chips while spindle is turning.
PROPERLY MAINTAIN MACHINE. Keep
machine in proper working condition to help
ensure that it functions safely and all guards and
other components work as intended. Perform rou-
tine inspections and all necessary maintenance.
Never operate machine with damaged or worn
parts that can break or result in unexpected move-
ment during operation.
SAFE OPERATING LOCATION. DO NOT place
machine where it can be exposed to rain or mois-
ture. Exposure to water creates a shock hazard
and will reduce life of machine.

-8- Model G0875 (Mfd. Since 3/19)
1.3 Safety instructions (warning notes)
1.3.1 Classification of hazards
We classify the safety warnings into different categories. The table below gives an overview of
the classification of symbols (ideogram) and the warning signs for each specific danger and its
(possible) consequences.
1.3.2 Other pictograms
Symbol Alarm expression Definition / consequence
DANGER! Impending danger that will cause serious injury or death to people.
WARNING! A danger that can cause serious injury or death.
CAUTION! A danger or unsafe procedure that can cause personal injury or damage
to property.
ATTENTION!
A situation that could cause damage to the CNC machine, the product or
other types of damage.
No risk of injury to persons.
INFORMATION
Practical tips and other important or useful information and notes.
No dangerous or harmful consequences for people or objects.
In case of specific dangers, we replace the pictogram with
general danger with a warning of injury to hands, hazardous electrical
voltage,
rotating parts.
Activation forbidden! Do not step into the
machine!
Do not extinguish with
water!
Access forbidden!
Wear safety shoes! Use ear protection! Wear protective glasses! Read the operating instruc-
tion before commissioning!