Lathe DRO with CNC Thrust Collars
NOTE: If using the DRO on a CNC machine, the axis cannot be moved faster than 15 in/min (381mm/min). The DRO was designed for manual use and it will not give a correct position readout at faster feed rates.
Select the inch/metric option to match the DRO handhweels to your machine’s leadscrew pitch. All ball screw machines use a metric pitch.
Upgraded DRO Chip
Beginning August 1st, 2021, all DROs will ship with an upgraded chip. This new chip upgrade allows our Digital Readout to function with our ball screw machines as well as our standard leadscrew machines. We also programmed some upgrades based on customer feedback like using Metric on Inch machines and using Inch on Metric machines.
The new DRO chip has six different modes to choose from based on the machine type, e.g., mill, lathe, leadscrew, or ball screw, and your preference of either inch or metric display on the DRO.
For more detailed information on setting up the modes for DRO, please see the DRO Mode Instructions.
NOTE: You must make sure you have the correct RPM tach sticker for your machine. Use a 6-pulse (P/N 81510) tach sticker if your machine is a leadscrew machine, or a 5-pulse tach sticker (P/N P/N 68060) if your machine is a ball screw machine.
The 8200-CNC/8210-CNC comes with CNC thrust collars to allow you to use the DRO on a lathe with stepper motors installed. You must remove the handwheels to install CNC stepper motor mounts on a Sherline machine. Sherline’s digital readout system measures handwheel rotation and translates it electronically into table movement rather than measuring table movement directly; therefore, removing the special DRO handwheels eliminates the DRO function. Some CNC users prefer to have a DRO reading the leadscrew movement to crosscheck the CNC input to ensure that the axis has actually moved the amount of the stepper motor input.
Most full-size shop mills used by machinists are now available with a digital readout. They are also popular on lathes because they make your life as a machinist much easier. Readouts on the X- (crosslide) and Z-axes (leadscrew) can be reset to zero at any time with the push of a button. From there, as you move the 2″ diameter handwheels, you can read the table position to 3-1/2 decimal places (.0005″) on the digital readout (Metric versions read to .01mm). You no longer need to count handwheel revolutions or make difficult calculations when cranking in a negative number.
If you use your lathe as a mill with the vertical milling column attachment, you can purchase a 3-axis DRO kit for the lathe (P/N 8210/8215). If you add a 2-axis DRO to your lathe now and later purchase a vertical milling column, you can purchase a kit to add the third DRO handwheel and sensor at that time (P/N 8240/8245). New lathes can be ordered with the DRO already installed. See the LATHES section for details.
Cost-conscious owners of both a lathe and a mill can save money by using a single electronic display box for both machines. The input cables from the lathe can be unplugged, and the readout box transferred from the lathe to the mill and vice versa. Depending on which machine you already have fitted with a DRO, ask for the upgrade for the other machine that allows you to use your existing box. See P/N 8220/8225 if you already have a mill with a DRO. See P/N 8210/8215 if you already have a lathe with a DRO.
220-240 Volt Electrical Current
The DRO power supply automatically switches from 120V to 240V for countries with 220-240 volt electrical current. You may need to use a wall socket adapter if you use the power supply in a country outside North America.
NOTE: The DRO can be ordered on any new machine as a factory-installed option. The digital readout handwheels replace the standard handwheels that would normally come with the machine. The regular handwheels are not included if you purchase a machine with factory-installed DRO. If you purchase the DRO as a separate option and install it yourself, you will have the stock handwheels left over.
USE WITH CNC: Though not designed to provide feedback to Sherline CNC machines as a closed-loop system, it can be adapted for use on the rear shaft of Sherline stepper motors for use as a separate readout. See using DRO with CNC page for instructions.
Always wear safety glasses when operating machine tools.
Download PDF 8200 Instructions
Download PDF DRO Mode Instructions
|81010||Mill DRO box and electronics (complete)|
|81320||2″ Crosslide handwheel, inch (Met. 81322)|
|81340||2.5″ Leadscrew handwheel, inch (Met. 81342)|
|81100||Encoder housing w/ wheel and cable|
|81110||Encoder housing upper cap|
|81120||Encoder housing body|
|81130||Encoder housing lower cap|
|81300||Crosslide thrust collar|
|81508||Leadscrew thrust collar|
|81280||#2 x 3/8” Self-tapping pan head screw|
|81270||2-56 x 3/8″ pan head Phillips screw|
|81500||Tachometer encoder & cable asby.|
|81510||Tachometer pickup decal|
|40440||#2 x 1/4” Self-tapping pan head screw|
|81310||Encoder star gear|
|81080||(2) Black tie-wrap|
|81050||115 VAC Power supply/transformer|
|81150||Stand for readout display box|
DRO Handwheel Installation