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CNC MILLING: CNC Jr. Table Top Mill®

THOUSANDS SOLD AROUND THE WORLD!

The CNC Jr. delivers quality and accuracy for LESS.

Why spend thousands on a manual-milling machine when you can let automation technology do the work for you?

IT'S TURN-KEY! EASY TO LEARN, AND EASY TO OPERATE!

The CNC Jr machine and controller are built to order and stock in-house in the USA. We do not buy and re-sell our CNC Driving System. So we'll never bounce you to a third-party vendor for limited support to either their controller or another vendor's machine. WE SUPPORT THE COMPLETE CNC Jr. MILLING CENTER INCLUDING ITS OPERATIONAL SOFTWARE BY PHONE OR EMAIL.

The CNC Jr. Table Top Mill is a versatile bench top mid-size CNC mill made for primary or secondary CNC machining applications. This CNC machine is intended for the user who needs the ability and performance of a CNC Bridgeport-type size machine without taking up floor space like larger CNC machinery. The CNC Jr. Table Top Mill is a great purchase for machine shops, research institutions, colleges, universities, high schools, and engineers who need to quickly prototype 3D parts, or one-man operations who need to mass produce hundreds of the same single part in their home garage-turned-shop. The CNC Jr Mill makes a great investment tool for business owners who would rather save money by machining their own parts instead of contracting the order out. Because of its size, the CNC jr can fit in areas where space is limited, yet can machine just about any application within 19” and 7”. SAVE YOUR BUDGET, TIME, AND BEGIN CUTTING PARTS THE SAME DAY. The CNC Jr. is made in the USA combining parts made in the USA and abroad allowing us to bring the savings to you. THE CNC Jr. IS TESTED FOR QUALITY AND PERFORMANCE IN-HOUSE IN IRWINDALE, CA USA.

CNC Jr. Table Top Mill Video

The CNC Masters Testimonials:

This picture was given to us by a satisfied customer: John Russell of Ruscool Electronics Ltd. from New Zealand using the CNC Jr Mill. The CNC Jr Mill is a popular machine that is purchased by many customers worldwide besides the USA. We take our aftersales support very seriously regardless if you are in the USA, or abroad. These are just some of the countries that represent our customers who have purchased the CNC Jr Mill or its Retrofit Kit: South Africa, New Zealand, United Kingdom, Gabon, Thailand, Japan, Mexico, El Salvador, Phillipines, Spain, Italy, Israel, Germany, Norway, Sweden, Vietnam, South Korea, Australia, Canada, Columbia, Argentina, Brazil, Puerto Rico, and Peru just to name a few!

Many of the parts I have produced on much larger and more expensive machines could have been produced on the CNC Jr...The benefits of the CNC Jr. are less cost and less size.  When we are looking at new machinery, we sometimes forget that the concrete these machines sit on is not free. --John Kitchens Dallas, Texas

Enterprises in Ontario, Canada. He said it took him only 15 minutes to machine these two aluminum frames (third pic on right) using the CNC Jr desktop milling machine.

Being a hobbyist who enjoys designing RC model boats from the ground up, I have found the CNC Masters Milling Machine to be indespensible for the creation of custom design fittings, which in turn allow me to fit out my craft with one of a kind parts. -- Mark Moon Queensland, Australia

Click here to view more of our testimonials.

CNC Jr. Features 

• Works on 32 bit operating systems: WINDOWS 7, VISTA, and XP on USB.
• Powerful X, Y, and Z-axis micro-stepper motors are size 34 with 1200 in/oz. of torque. Stronger torque coupled with micro-stepping motion allows the CNC Jr. to perform accurately without losing steps. 
• The minimum possible motion is .0001” with a minimum speed of 0.5” per minute. The maximum speed is 100” per minute on your Rapid Settings with ramp down effect to keep the machine from jerking.
• Full 3 Axis or optional 4 Axis coordinated motion control on bipolar motors--far superior over unipolar technology when it comes to torque and power. True Interpolation!
• Hand-Wheels on each axis for manual option machining with motor disengage feature to retain spindle speed control (applies to the CNC Jr. with variable spindle speed control).
• X & Y Axes Zero Backlash Ball Screws with pre-loaded ball nuts to eliminate play on the table and saddle travel, and provides precision machining. These custom-made precision ball screws allow for precision conventional and climb milling operations and accurate circular and contour cuts without time consuming setups.
• Z Axis pre-loaded arrangement to eliminate backlash on the up/down travel.
• X & Y Direct Drives--no timing belts to adjust. This results in smoother operations and ensures accuracy unlike pulley and belt drive methods which can cause the belt to buckle causing inaccurate results. This unique design of direct drive keeps the user without having the need to change the belt or adjust as it wears down.
• Home Reference Sensors on the X, Y, & Z which saves your home/zero position as the first line of your program. This feature allows you to quickly return to the home position on any program without having to manually zero your three axes again.
• Limit Switches on all extreme ends of X, Y, & Z travel allowing you to confidently test your program without having to worry about an axis travel to its end and causing damage to machine.
• Tool Height Compensation with Automatic Quill Retraction for easy R8 collet tool change
• Tool Cutter Radius Offset Compensation
• Run your tool path from any line on your program
• Easy to Use Jogging Features and Feed Control by pc mouse or keyboard
• Jog-Input Command automatically writes each line of your tool path as you manually jog each axis by pc mouse, keyboard, or the optional hand held remote control joystick to save as a program for repeat use.
• Software Power Feed capabilities on X, Y, Z, and W with one click of the pc mouse for exact relative driving distance.
• Hooks up to your PC, comes pre-built from the factory, and is completely tested before shipping out.
• Pre-engineered for you when it comes to pitch and resolution. No axis or motor tuning needed at setup. No additional parameters set-up required. Display resolution is 0.0001 micro-stepping travel. Just start using it.
• Runs files from popular CAD-CAM softwares that produce standard G-Codes such as Mastercam, Surfcam, etc to machine and engrave intricate and detailed parts.
• Load DXF files from graphic programs such as CorelDRAW into CAM softwares to machine or engrave detailed parts from scanned images.
• Easily build a file of commands to machine simple parts such as drilling operations without the need to learn to use a CAD-CAM program.
• Digital Read Out Display of your X, Y, Z, (and optional W) counters on your computer screen in INCHES or MILLIMETERS using your PC mouse, keyboard, or our optional Hand Held Remote Control Joystick.
• Can add fourth axis, engraving attachment, coolant, quick tool change, and splash guard shield from our line of accessories to the CNC Jr. Mill
• Optional CNC Jr PLUS Computer Controlled Variable Spindle Speed, save time without having to change the belt, and program your spindle's speed in the Master Software through g-codes, simple conversational commands, or on/off with your PC mouse.
• User-friendly setup for any beginner or experienced machinist. Easy to learn and operate. See our testimonials.
• A 3" U Type Angle Vise, JT6 Drill Chuck with Key and Arbor, Carbide Tipped Surface Cutter come standard with every Jr. Mill.
• Backed up by our CNC MASTERS ONE YEAR WARRANTY or extend it for two more years.
• Unlimited "life-long" operational Tech Support step-by-step trouble shooting and walk-through process by email or phone support Monday-Friday PST during normal business hours for as long as your company owns the machine.
• Easy to repair, replace parts, and maintain unlike costly servo systems that need to be serviced by a trained technician.
• Free Master Operating Software Updates for as long as the hardware can support it.
• Discounted Prices for Existing Customers of CNC MASTERS. Check out our CNC Jr. Package Prices!

The CNC Jr. Specifications

CNC Jr. Control Unit

The Control Unit is a microcomputer based micro-stepper motor driver with 4D interpolation capabilities. It accepts motion commands from your host computer through a standard USB port, making it easier for the user to connect to his computer in the industry. The Control Unit can drive up to 4 motors. The Control Unit is mounted directly on the back of your CNC Jr. Mill out of your work space unlike other models that require a separate stand. Other optional outputs are the coolant, and spindle controls. The power requirement are 5 amperes at 115VAC.

Upon request for international orders, we can re-wire the Control Unit to meet 220-240vac standards at no extra charge.

CNC Jr. Tolerances

YOUR CHOICE in POWER:
The CNC Jr. Mill runs on 115vac, $5,423.00 or the CNC Jr. Mill PLUS COMPUTER CONTROLLED VARIABLE SPINDLE SPEED, runs on 220vac single phase, $6,173.00

The CNC MASTERS Master Operating Software for the CNC Jr. Milling Machines

Back to CNC Jr. Mill | Back to CNC Baron Mill | Back to CNC SUPRA Mill

	PROGRAM SAMPLE:
	001 ABSOLUTE
	002 MOVE X0 Y0 Z0
	003 SPINDLE ON FORWARD SPEED 400 RPM
	004 COOLANT ON
	005 INCREMENTAL
	006 CALL ROW 10 TIMES
	007 SPINDLE OFF
	008 COOLANT OFF
	009 MOVE X0 Y0 Z0
	010 END /MAIN PROGRAM
	011 ROW /BEGIN SUBPROGRAM
	011 MOVE Y-0.6
	012 CALL DRILL_COLUMN 10 TIMES
	013 END /ROW SUBPROGRAM
	014 DRILL_COLUMN /BEGIN SUBPROGRAM
	015 MOVE X.6
	016 FEED 1.0 /INCHES PER MINUTE
	017 MOVE Z-1.1
	018 RAPID
	019 MOVE Z1.1
	020 END /DRILL CALL

	N00 ABSOLUTE
	N01 MOVE X1.0 F5
	N02 CCWCIRCLE X1.5 Y0.5 I0 J0.5
	N03 MOVE X1.5 Y1.5
	N04 CCWCIRCLE X1.0 Y2.0 I-0.5 J0
	05 MOVE X0 Y2.0
	N06 CCWCIRCLE X-0.5 Y1.5 I0 J-0.5
	N07 MOVE Y0.5
	N08 CCWCIRCLE X0 Y0 I0.5 J0
	N09 END        

Other Master Software Features:

• Tool Height Compensation with Auto Quill Retraction for easy R8 Collet change out
• Relative driving of any precise distance with one click +/- on the chosen axis
• Go From Line Command--allows the user to start his toolpath from any line on his program
• Beep End Program--a beeping sound from the computer to notify the user that the job is done
• Peck Drilling Cycle
• Mirror Command--runs the opposite direction of the written toolpath.
• Go Home--recounts its steps back to your Zero position
• Saved Home Positioning--never lose your Zero position again when machining the same part
• Pre-Set--allows you to begin machining at any given value on the X Y Z counters other than zero
• Tool Radius Offsets
• Intuitive Interface with axis jog buttons placed in the viewpoint of the cutter to avoid confusion of direction

USE the CNC Jr., CNC Baron, or the CNC SUPRA with POPULAR CAD-CAM SOFTWARES

	G00 = Position (Fast speed)
	G01 = Linear interpolation (Feed speed)
	G02 = Circular interpolation (CW)
	Format: X__Y__I__J__ I,J are relative distance from start to center.  Incremental Z can be added for helical designs.
	G03 = Circular interpolation (CCW)
	G17 = Cancels G60 Command
	G27 = Reference point return check
	G40 = Tool Radius compensation off 
	G41 = Tool Radius compensation left 
	G42= Tool Radius compensation right
	G60 = Switch data from Y to W * radius factor
	G70 = Input in inches
	G71 = Input in millimeter
	G80 = Cancel Peck Drilling Cycle
	G83 = Peck Drilling Cycle, Format: X____Y____Z____R____Q____P____F____
	G90 = Absolute move (Modal)
	G91 = Relative move (Modal)
	G98 = Return to initial point in canned cycle
	G99 = Return to R point in canned cycle
	M00 = Stop
	M02 = End routine
	M03 = Spindle on
	M04 = Spindle off
	M06 = Spindle reverse
	M08 = Coolant on
	M09 = Coolant off
	M30 = End program

	N01 \ THIS PROGRAM CUTS 2-1/5-2 THREAD USING A 1/2 DIA. 60 DEGREES DOUBLE
	N02 \ ANGLE END MILL CUTTER
	N03 SPINDLE ON SPEED 1000 FORWARD
	N04 COOLANT ON
	N05 G00 X1 Y1.2480 Z0
	N06 CALL THREAD 5
	N07 SPINDLE OFF
	N08 COOLANT OFF
	N09 END
	N10 THREAD
	N11 G90 
	N12 G02 X1 Y1.2480 Z-0.5 I1.0000 J0.0000 F5
	N13 END

A testimonial from our customers, Holgate Enterprises in Florida using a CAD-CAM software on his CNC Supra Mill:

Hi CNC MASTERS,

I wrote the program on BOBCAD. It was a little tricky but basically I used it for a training exercise kinda like mountain climbing! Bobcad uses what they call "Solids". Under this category are "Primitives". There are five choices of these primitives: Sphere, Cube, Cone, Cylinder and Torus.

When using these, you must (always) instruct the program the size of these"parts". A chain is made up basically of Torus's and Cylinders. The torus being the ends (left and right) and the center portion is the cylinders. Unfortunately, the program will not write a half a torus. However, one can draw the whole torus and then"erase" half of it. After the first "Link" is successfully drawn and verified using the "render" command, then its just a matter of copying the link, pasting it (in the correct numerical distance to the right), rotating it 90 degrees (every other link is either vertical or horozontal.) and so on.

Upon completion, it has to be rotated every 90 degrees and ran again until the four quadrants are completed. Also, if you examine the picture, at the corners the two vertical sides finish with a half link turned 90 degrees and the top and bottom ones (shorter) must "meet" these corners too. So, as you can imagine, it was a real task and involved large degrees of visualization and so forth.

CNC Master's Jr Mill Accessories

Hand-Held Remote Control

Our most popular CNC accessory, now only $485.00!  Almost every customer orders one with their CNC Masters Milling Machine.

Our exclusively designed Hand-held Remote Control gives you greater ease in controlling the CNC Jr., Baron, or Supra during initial setup as well as during the operation of the machine without using your computer keyboard. Most importantly--you can jog your axes while never having to remove your sight off the part. Machine simple slots, do profiles, and drill holes without booting up your computer.

The Hand-Held Remote features:

• Knobs for spindle and feed speed control
• Joystick to jog any of the selected three or four axes which allows the CNC Jr./CNC Baron/CNC SUPRA to be operated without having to touch your keyboard or manually cranking the Hand Wheels on the motors.
• Micrometer wheel which is located on the bottom of the remote.  This feature allows you to position any axis in a minimum increments of approximately .0002" and two added multiple selections to move medium speed and faster speed.
• "GO" button from where you can run your program loaded on the host computer.
• "ZERO" button which allows you to remotely zero any axis during setup.
• Red "KILL" button is located at the top of the remote to be used in the case of an emergency stop.

The Hand Held Remote comes with Velcro on it back for easy mounting on the machine and plugs in directly into the Control Unit through serial port.  It is worth adding this accessory to your CNC MASTERS Mill or it retrofit kits for its added convenience and time saving features.

Variable Spindle Speed Computer Control for CNC Jr. PLUS or the CNC Supra Mill

The optional variable spindle speed control allows you to power on/off and select any speed through the MASTER software.  This feature becomes very useful for the user needing automated control of the spindle speed.  This feature will save the user time from having to stop the tool path program in order to manually adjust the belt and pulley to obtain a different desired spindle speed.   The control is a three phase power inverter and requires 240VAC single phase power to operate.  The belt and pulley system are kept on your machine for added convenience of changing the torque on the spindle.  For example, the user needs a very low spindle speed which he can get using the variable feature, but the user also needs a high torque; adjusting the belt will give the user the extra flexibility of adjusting the torque on the spindle if the need of adjusting the torque should ever arise.  The variable spindle can now also be powered on/off and maintain speed control through the Master Software or Hand Held Remote Control while having the motors disengaged to manually machine a simple part if needed.

Both the CNC Jr. PLUS, CNC Baron, and CNC SUPRA with "computer controlled variable spindle" is powered on single phase 240 vac . (The CNC Baron comes standard with computer variable spindle.)

Engraving Attachment

(Above) One of our oldest customers of roughly 12 years recently sent us these engraving pics from there CNC Jr. Milling Machine. Their testimonials are the kind that keep us happy and pushing to drive some of the best relationships in the business.
	With the CNC Jr., Baron, or Supra, there is no need to have a separate engraving machine. The optional engraving attachment combined with the 3-D machining ability of the CNC Jr., Baron, or Supra, offers engravers creative opportunities not possible before. Furthermore, with the 4th axis rotary table, you can now engrave on curved surfaces!  For example, you could scan the autograph of your favorite baseball player and engrave it on a bat, or you could have a pool cue engraved with your own unique design.  CNC MASTERS offers Three Choices: CNC Jr/Baron Engraver Attachment The engraving attachment, which is a 3/4 HP Router that has a maximum speed of 23,000 RPM, mounts on the same spindle axis. It can be quickly attached or removed with a single clamping screw.  You will have 11" of throat space or distance from the table to your router to machine your intricate details on your part.  The router comes with a 1/4" collet so any tool with a 1/4" shaft will work.  You can also use a reducing adaptor from 1/4" shaft to 1/8" holder for your tools that have 1/8" shaft.  (The Router Attachment is designed for the CNC Jr. or Baron Table Top Mill.) AIR TURBINE Air Spindle Attachment (can be used for the CNC Jr, CNC Baron, or CNC Supra Mills) You also have the option of the Air Driven Spindle with a maximum speed of 40,000 RPM, for jewelry, mold making, and fine machining and engraving such as designing a three-dimensional face for a doll or action figure.  The Air Driven Spindle requires your air compressor to go to 90 PSI at 3 cubic feet/minute of air volume to obtain maximum RPM and connects to your spindle with R-8 collet.   The AIR TURBINE Model 625JS -- 3/4" shank, 1/4" collet size for cutting tools.  The jewelry design in this picture was from our satisfied customer in the jewelry business using the CNC Jr Mill and the Air Turbine Air Spindle. Design is by Nouveau, Inc. in Bersa, OH.

(above) These pictures were sent to us from another satisfied customer using the CNC Supra along with 4th Axis and Supra Engraver.

...."I decided to buy the rotary table at same time as the CNC SUPRA machine itself.  Thank the
Lord 'cause about a month later I had a gear cutting job come in for 100 gears at $150 a pop!  Paid for the thing 15 times over! The Supra Engraver was a great idea!" --Ed Holdgate, Florida USA

4th Axis Rotary Table

TRUE CNC FOURTH AXIS CONTROL! The ability of our CNC Control Unit to interpolate one or multiple axis with the 4th axis 6" rotary table, offers more options for machining difficult parts. Our 6" rotary table can be easily jogged and has a minimum motion of 1/100 degree. It can be secured on a horizontal or vertical position.  The fourth axis motor is the same as the X, Y, Z motors which are size 34 with 1200 in/oz. of torque and is programmable in the same manner as the X, Y, Z axes.  The the motion of the fourth axis can be interpolated with the X, Y and Z. The rotary table is easily removable from our cnc mills when three axis machining is needed only.

Quick Tool Change

Tool change with height compensation. With the CNC Jr., Baron, or the Supra you can machine production parts that require several tool changes. You can program up to ten different tools. The MASTER software will automatically adjust the Z axis for each tool change. The tool height compensation complements our manual quick tool change system. It only takes a few seconds to release and replace a new cutter from the master holder. This smart investment will pay off in no time. CNC Masters is proud to bring you two options to choose from, the quick tool change system by Royal Products or quick tool change system by Billet Designs.

Your Choice.....

Billet Designs (Kit price: $1,195.00. Purchase with CNC Masters Mill $1095.00.)

Call 1-877-262-8895 or email us sales@cncmasters.com to place your order.

• Designed to be used with the Billet Designs R8 Quick Change Master Holder.
• Maximum Capacity (Decimal Inch)  .5120"
• Minimum Capacity (Decimal Inch)  .0390"
• Integrated design - avoids chuck falling off.
• Keyless - so there are no keys to keep track of or failing.

Additional ER25 Holders, $188.00 each.

Royal Products (Master Holder: $515.00; End Mill Holders: $160-$170 each.)

Master Holder and End Mill Holders sold independently

Quick Tool Change Features:

• Once installed, tools can be changed in seconds.
• Short overhang and positive drive permit many milling and drilling operations.
• As simple to install as an R8 end mill holder; no machine modification necessary.
• Female taper of body ground to .0002" TIR in relation to R8 taper.
• Male taper of individual tool holders ground to .0002" TIR in relation to tool holder diameter.
• Tools are easy to remove and install with one hand.
• Very little clearance is needed between the tool and workpiece when changing tools. This greatly reduces the amount of time spent moving the table or retracting the quill when changing the toolholders.
• The body can be left in the spindle, reducing wear on the spindle from constant tool changes.
• Tool is designed for light/medium-duty milling. We recommend using a solid end mill holder for heavy milling (5/8" and larger).  Note: A collar locking screw is provided on each unit and should be engaged for the following applications: Operation above 3,000 rpm.  When milling diameters of 3/4 " or larger. When performing heavy milling.
• Made in the UK.

PROTECT YOUR SURROUNDING FROM COOLANT SPLASH AND DEBRIS

The CNC Jr./Baron Splash Guard Shield Kit is an ideal accessory for the user who cannot afford to make a big mess around his/her working station.  The Splash Shield Kit is designed to be used with the CNC Jr. Milling Machine.  It will "limit only" debris and coolant splash from flying all over your shop, classroom, or research lab.  Your kit comes complete with shields, hardware, and mounting instructions.  (Drilling and tapping of the CNC Jr. or Baron will be required.  Shields are intended to only help safeguard the surrounding environment from debris and splash.)

We also carry a line of tooling for your CNC Jr., Baron, or CNC Supra:

Click the button below to order your CNC Jr.!