Newall

Digital Readout Systems: DP1200 Digital Readout

NEW DP1200 Digital Readout

The DP1200 was designed specifically for long travel machine tools.  It includes features that are essential for increasing productivity on boring mills, VTLs, milling machines and long travel lathes.  Built with the operator in mind, the DP1200 includes large, clear numerical displays and an intuitive color TFT message screen along with an optional DSU. 

Download DP1200 Digital Readout Documents:

DP1200 Data Sheet (DP1200 Data Sheet)
Spherosyn and Microsyn Installation Manual (Spherosyn and Microsyn Installation Manual)
DP1200 Quick Start Guide (DP1200 quick start guide)
DP1200 Operators Manual (pdf)

  • Available in 2, 3 or 4 axes (inlcuding rotary / angular)
  • Clean, Crisp, Extra Large, LEDs
  • 3.5″ TFT LCD diplay – high density, high contrast
  • User Definable Axis Legends
  • Solid Cast Construction
  • Long Life Membrane Keypad
  • Safe, Low Voltage Power Supply (UL)
  • Panel Mount Version Available

DP1200 Features Include:

  • Real-Time Tool Path Graphics
  • Auto-Zoom
  • Feed Rate Display
  • Bolt Hole Circle Routine
  • Line Hole Routine
  • Arc Contouring
  • Programmable Memory/Teach
  • Polar Coordinate Readings
  • Tool Offsets
  • Taper Calculations
  • Axis Vectoring/Summing
  • Linear and Segmented Error Comp.
  • Skew
  • RS232 Output
  • Languages: English, French, German, Spanish, Italian, Turkish, Czech, Russian, Portugues, Danish


Linear Encoders for Newall DR Systems

 

Spherosyn™ and Microsyn™ encoders are designed to give you consistent accuracy and reliability under even the harshest shop conditions. Based on the principle of electromagnetics, Newall’s analogue encoders embody a truly innovative design in which all of the electronic and measuring components are sealed and protected. The encoders carry an IP67 (NEMA 6) environmental rating and will continue to provide accurate and reliable readings even when submerged in water, oil and coolant.

Encoder Benefits

  •  IP67 (NEMA 6)
  • Withstands dust, dirt, oil and other environmental conditions
  • No mechanical wear characteristics
  • Requires no cleaning or maintenance
  • High tolerance to shock and vibration

Defining Accuracy, Resolution & Repeatability

ACCURACY IS NOT a simple subject. It’s not enough to say that a particular scale is “extremely accurate” or “more accurate than another brand.  You need to understand all the different terms that help define accuracy and how they relate to one another. Once you achieve this, you will be able to help others understand the concept.

For a DRO system consisting of a readout and encoder(s), it is customary to explain both, the accuracy (of the encoder) and, the resolution (of the display unit). It is essential that the the two are not confused.

Accuracy

Accuracy is the relationship of the physical movement of the encoder components to a known measurable standard. It is usually quoted as +/- an amount or TIR (Total Indicator Reading). The effect of both is to produce an “envelope” which is stated by the manufacturer to be the total deviation from an absolute which can be measured by means of length bars, slip gauges, etc. Accuracy is usually related to length (either an ‘amount per unit of length’ or ‘an initial amount plus a further amount per unit of length’) and is measured at a particular calibration temperature.

Resolution

This is normally a function of the DRO and relates to the smallest digit which is shown on the display.  It is possible, but unlikely, to have a high accuracy encoder reading through a low resolution DRO where the benefits of the high accuracy are eliminated by the limitations of the DRO’s low resolution. The exact opposite, which is also more likely, would be that high resolution in a DRO does not guarantee the encoder is also of high accuracy.

It is probably more helpful to speak of system accuracy, which is conventionally calculated on the basis of encoder accuracy plus one-half the resolution of the DRO. The modern tendency to quote very high resolutions often ignores the fact that a encoder cannot be accurate to the same limits and there is, therefore, a danger that the machine tool user is being “hoodwinked” into believing that he can obtain high degrees of precision when, in fact, he cannot.

Repeatability

Just as it sounds, repeatability is the ability of a system to produce the same reading every time the same dimension is measured. However, it is important to remember that this term is governed by factors outside the ambit of the DRO and encoder (i.e. condition of the machine, gib adjustment, hysteresis).

Application

When choosing a DRO system, you must also take into account the machine to which it is being fitted and, the fact that you have a system which has a high accuracy does not necessarily mean that the degree of accuracy is either required or needed. A highly accurate DRO system will not correct the inherent inaccuracies of the machine tool.