IH CNC & Machinery

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Our Turnkey CNC Mills have full spindle, Quill and motor control other than the computer keys. This is very important for conversational CNCing, drilling, rigid tapping and an easy way to set tool height. Just a few things that other CNC Mills JUST CAN'T DO.   Our Turnkey CNC Mills are Complete including Computer - Monitor - Cad Cam  and  Mach Software. 

Offer turnkey solutions starting at about $3900.00 more or less for mini's.
Some even offer Small Square column stepper solutions starting around $7500.00 plus Computer and Monitor.

Positioning Control and Accuracy

Close Loop Servo
A closed loop servo system is continually updating it's position with the servo driver to maintain proper position.

Open Loop Stepper
Neither the controller nor the driver have any real idea on where the machine is at.

Power

Servos
Custom servo's are expensive and are rated with two numbers, continuous torque and peak torque.
We sell it with both numbers, continuous it can do all day, peak is for rapids.
(Just to make it easy we convert it all to machining force)

Steppers
Stepper's are very inexpensive and rated with two numbers, holding torque and torque at a given RPM (the faster you go the less torque you have).
They sell it with the holding torque numbers (800 in/oz for example) but the second that machine moves cut that number in half, and it gets worse the faster you go.

Power Transmission

   Belt Drive Reduction
More complex than direct drive.
Offers torque multiplication equal to that of drive ratio.
For example, our Turnkey 3 axis CNC Mill
uses 410 in/oz peak motors on the X and Y axis.
The drive ratio is 4:1.
So the ballscrew sees 1640 in/oz of torque.
Our math: 410 in/oz  x  4 = 1640 in/oz
And the Z-Axis (it uses a bigger motor)
648 in/oz  x  4 = 2592 in/oz
We rate our servo's very conservatively. The actual numbers are bigger.

       Direct Drive
No multiplication of torque. 
Not Much Speed around 65 ipm rapids
Not Much Power

Encoder Placement

End of ballscrew.
Mounting the encoder at the end of the ballscrew is more difficult that mounting directly on the motor, but it takes belt stretch and residual pulley buildup completely out of the equation. Our CNC Mill moves and machines in tenth,s 0.0001 of a thousandth. Steppers cannot do this.

Stepper systems don't use encoders.
Many inexpensive servo systems mount the encoder on the motor, this allows belt stretch and residual pulley buildup to cause both acceleration/deceleration and cyclical positioning errors.

Cost Per Inch

A Turnkey CNC Mill from us with 30.5" x 12.5" X-Y axis cost $10470.00 complete. We will round UP the price of our CNC Mill to 10500.00.
30.5" x 12.5" =381 square inches of working envelope.
$10500.00 / 381 = $27.46 per square inch of envelope and this is for a precision Servo Driven Powerhouse with Axis feeds of 120 ipm.

Their working envelopes average 18" x 9.5 X-Y axes. 
We will use the Lowest price for a semi turnkey system of around $7500.00.
18" x 9.5" = 171 square inches of working envelope.
$7500.00 / 171 = $43.86 per square inch of envelope. Add a computer and monitor and this goes up.

Running "Wet"

Our Turnkey CNC is designed to run in the harshest environment, full flood.  We use a moderate 2000GPH on our mill, so you can use as much or as little coolant as you wish.  We can even handle:

• Mist systems
• Cold air guns
• Spray bottles
• One drop or a few thousand GPH we can handle it.
  

CNC system not sealed, you cannot use flood or other high volume coolant systems.
To be exact we're not too sure if any of them can handle mist or even a spray bottle, sealed is sealed, and unsealed is unsealed.

Castings and the Z Axis

The Square Column mill we start with is the biggest in the country and offers superior rigidity.
It weighs the most, and features a solid column supporting the head that weighs about 275 lbs.  We use a "Full Head Z" design that give more than 20" of Z axis travel and allows the quill to be used independent of the CNC.

Use a lightweight square column with a small head slide or round column mill that have quite a bit of flex inherent to the mill itself.
Some CNC only the quill which give a Z travel of only a few inches.  Also, CNC quill designs are okay for only the first few inches, after that quill deviation becomes excessive.

Made in the ?????

CNC Made in the USA
Of course the base mill is made in China, nobody in the USA makes a square column mill.
But, the CNC is made in the USA. Using quality parts made by us or made in the USA, American Ballscrews, American Electronics, American Servo Motors.

We're a not sure exactly where they have their CNC made, but It's surly not the USA.

Use their own products

At IH CNC & Machinery we use our products to make our products.  To be exact you can order the exact same setup we use every day except newer .
If you look at the pictures that we show as fixture examples or "How To's' you'll see that those are setups for our parts.  Not some illusionary this is what you can make with our mill example.

We know they do not use their products to produce their products.  How do we know?  Stepper based systems are too unpredictable to run production on.
How else do we know?
Their products do not evolve, our 3 Axis CNC System is now on the 5th generation.
Working envelope is everything, it can mean the difference between getting one part on the mill at a time or ten parts.  As a manufacturer we use every square inch, since their working envelopes are so small it would be cost prohibitive for them to use their own machines.

The long and short of it is simple, we all use CNC for basically the same reasons, to produce high quality parts.  It doesn't matter if it's your first part or your millionth part. A Turnkey Ready to Run CNC Mill from IH CNC & Machinery will get you there.
Really want to find out what an IH Turnkey CNC do?  Come visit us.  We're located just 20 minutes from the (Bradley International Airport), in Connecticut and you can fly in for the day or more to see everything in action and yes we will let you run our mills.