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Click HERE to read how to initialize 1 micron scales on the DRO PROS 2L Lathe Kit Click HERE to read how to initialize 1 micron scales on the DRO PROS 2M Milling Machine Kit Click HERE to read how to initialize 1 micron scales on the DRO PROS 3M Milling Machine Kit
GS10 / GS11 Glass Scale Standard Size Scale Dimensions:
(Click the graphic for a larger picture)
GS30 / GS 31 Glass Scale "SlimLine" Scale Dimensions:
(Click the graphic for a larger picture)
Did you order 1 micron scales? Make sure to 'initialize' them to the readout:
Please keep in mind one table cannot possibly cover all possible variations of Milling Machines DRO PROS always recommends measuring your particular machine's travel
Glass Scales:
Digital Scale Size refers to the part number. In other words, the smallest scale (also known as a linear transducer), we carry is referred to as a 100mm digital readout scale.
Obviously, you want to pick a digital scale with enough capacity to allow the reader head to at least physically travel to the limits of your particular machine. While our guideline is to recommend allowing ~1/2" on either end of the scale for clearance, you may decide to leave less room. One instance where it might make sense to reduce the end clearance is when you're installing a scale on a lathes cross slide.
For example, if your lathes cross slide travel is 6", our chart would recommend using a 200mm digital scale. But an experienced installer might very well choose a 150mm linear transducer instead, realizing that the end clearance will be less than what we recommend. Still, note that the overall maximum scale travel of a 150mm scale is ~ 6.9", which is more than the machines travel of 6". The installation should be fine, but the installer must realize when choosing a mounting point for the readhead that the end clearance is less than what we recommend. So how far can you take exception to our recommended clearance of 1/2" on either end? As far as you feel comfortable. Just realize, the less clearance = the more likely the readhead may run into the end of the digital scale. In other words, be careful!
How to measure your machines travel, or capacity Why do we have to measure our machines capacity? Why can't we just use the stated travel specifications from the manufacturer? Won't all machines of the same model type have the same capacity? Surprisingly, no. Manufacturers typically overstate their machines travel, especially for the Z or vertical axis on milling machines. Typically the travel is measured without a drill chuck or collet in place, sometimes even without the spindle! Further, additional accessories like power feeds may sometimes limit your machines travel to less than original spec's.
Here then, is the easiest way we've found to measure your machines travel: With the machine off, position the machine to the far end of its travel. With a grease pencil, make a mark across where the movement and stationary surfaces meet. Next, position your machine to the opposite end of its travel limit, then simply measure the distance between the marks. Congratulations, you've just measured your machines true capacity!
Length simply refers to a scales actual physical outside dimensions or overall length. There is 3" distance from the center of the reader head to the outside of either end of the scale. Therefore, every scale is physically 5" longer than it's maximum capacity. For example, our 100mm scale has a capacity of 3.9" but is physically 9.9" long. Likewise, 600mm scale has a capacity of 23.6" and is physically 29.6" long. Still confused? Don't worry about it - Just give us a quick call and we'll work you through it!
Price. Most likely you'll be buying our scales with a kit. Our 100mm - 1000mm scales are included in the price of the kit and there is no surcharge. Simply tell us what size scale you'd like and we'll send the correct length digital scale. For scales greater than 1000mm (our oversize scales), there is a surcharge based on length when purchased with a kit (see the chart).
Glass Scale Accuracy:
Advanced Optical Measuring Systems (Glass Scales)
High Noise Immunity & (EMC) Design The slide carrier of the GS series digital readout scales uses a five bearing design. The optical grating linear transducer has been proven as the most reliable system design in today's market. The glass grating slideways are lapped, and JIS standard P5 grade bearings are used to achieve smooth and accurate movement and long working life.
Double Seals Design The plastic seals of the GS series digital readout scales use an innovative material to offer superior oil resistance, high elastic recovery properties and durability. Carefully designed lip geometry offer low slide resistance.
100% Laser Calibration All glass grating linear transducers are individually inspected and calibrated by Easson's in-house laser calibrator to ensure 100% accuracy.
ASIC Interpolator ASIC Interpolator is built-in inside the GS Series Glass grating linear transducer to facilitate increased resolution of the grating. All frequency multiplication is implemented 100% by hardware phase shifting inside the ASIC interpolator to minimize the real time measurement error. Additionally, error drift caused by environmental temperature change is minimized by constructing all resistor ladders for phase shifting with the same piece of semiconductor.
Industrial Standard Output Signal Interface Only the industrial standard TTL digital signal output is available. Interface is the industry standard 9 pin DSUB9 connector.
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