The motor requires a single phase brush type PWM amplifier with power supply, that is rated with sufficient current and voltage to meet the motion requirements. The inductance of the linear motor coil should be greater than the minimum load inductance of the servo amplifier.
The brush motor is an open type motor and should not be mounted in an environment that is wet or excessively dirty. It should be protected with some type of bellows or cover when installed by the customer.
The DC brush motor should be mounted to flat (better than .003"/ ft [246 microns / m] and stiff surface. Threaded holes on the bottom of the coil assembly or optional thru holes are present in the aluminum angles to allow for the mounting of the motor to the customers system. The moving secondary assembly has threaded holes on the top surface for attaching it to the customer supplied moving table. The motor may be mounted in any orientation. When mounting the stage with the secondary moving vertical, it should be noted that the stage will be required to generate additional force due to gravity and that the stage will slide down to the bottom when power fails.
Mounting: The motor primary must be aligned (parallel) to the equipment guide ways within 0.005” (0.127mm) on each end. Use gauge blocks and shims as necessary. Precise parallel alignment of the motor to the equipment guideways is required. Align the stationary half of the motor to the guideways. Then align the moving half with the stationary half. When securing the primary to the equipment base do not allow the screws to penetrate the motor more than .25” deep (to prevent damage to the motor windings). To mount the motor secondary, slide the table over the secondary and align the mounting holes. The secondary is to be secured to the moving table with screws after the proper amount of shims are added to maintain an air gap of .015” min. to .020” max. (unless otherwise specified) between the secondary and the primary. This is achieved by ensuring that the plastic shim provided does not bind anywhere over the length of the primary when moving the table top with secondary back and forth by hand. The plastic shim between the primary and the secondary can now be removed. Be sure that the secondary is centered and runs parallel to the commutator to within .005” at each end. Electrical Check: With an ohmmeter across input terminals, verify that the resistance reading does not drop to zero when the secondary / commutator assembly is moved over the entire length of the stationary primary. If a zero reading is observed, inspect the connections between the commutator brushes and the power input wires. In addition, inspect the connections between the motor windings and the commutator bar. Motor Removal: Insert the plastic shim between the primary and secondary to maintain the air gap. First, disconnect the power input wires. Next, remove the screws between the secondary and the moving table as this allows the secondary to sit on the primary. Then remove the mounting screws between the primary and the base. Finally, the complete motor assembly can be removed and placed on a level, flat surface. Secondary Removal: If just the secondary must be removed,slide the table with the secondary attached, to one end of the primary. Insert a .015” minimum plastic shim between the secondary and the primary to maintain the air gap. Remove the screws between the secondary and the sliding table. Move the table out of the way and slide the secondary out using extreme caution so as to not damage the brushes. If brushes are worn out, contact Baldor for replacement. Secondary Reinstallation: Place .015” minimum plastic shim on primary face. Next place .015” min fiberglass shims on the brush assembly and completely depress the brushes into their holders. With the brushes toward the commutator bars, slide the secondary onto the primary face (with the shim in place). When the secondary is in place, gently remove the shim from between the brushes and commutator bars. Note: Ensure that the shim between commutator and brushes has rounded ends and that they do not cut the leads to the commutator bars. Refer to “Mounting” instructions to reinstall. Brush Motor Connections: Black / Red (+) White (–)