FAQ LINEARSTEP

Unfortunately, we do not have at this point.

Motors of the same size with different rated voltages will have the same characteristics when you drive them at the rated voltages.

No, it won't.

We can provide the information of "lifespan for a LINEARSTEP" separately. Please contact the NPM sales representvie or request through website.

We basically sell the threaded shafts as a set with the motors. However, it may be possible to sell them separately for customized products. Please contact us.

The stroke can be customized.
We can produce from one piece. Please feel free to contact us.

There is no problem in using that way, but please be careful when moving the motor as the lead wires are not bend-resistant.
Also, if both ends of the shaft are tightly fixed, misalignment cannot be absorbed. Please pay attention to the mounting accuracy.

No, it is a slide-thread motor.
The ball-screw shaft type is PJPL28T series (Rolled ball-screwed).

If the retainer at the rear end of a shaft gets bitten in the manual actuator part of a motor hub, it may not return.
Carefully rotate the manual actuator to return it.

We do not recommend to hit the shaft end to the edge of a unit (=hard-stop) as it may cause threads to be bitten.
If you require repeatable positioning accuracy, we recommend the origin-return operation with a sensor.

No, the thread mechanism of LINEARSTEP does not allow the reverse operation (thrust to rotation), so it cannot generate any electricity.

Structurally possible, but be careful not to get dust on the threads or to apply sufficient grease, as this may change the characteristics.

Although there is no clear definition, backlash (lost-motion) will occur to the extent of thread rattles of a shaft.

If you want to avoid backlash, you can use a spring or the like to pull the load to one side. Under conditions where a certain amount of thrust force is required, the pressed-allowance on preload springs in the bearing section may be taken into account in addition to the thread rattle.
Please contact us for details.

It may be possible if the total length of the shaft is less than 150 mm.

"T" stands for tapping (female thread).

There is no specific standard for the positioning accuracy motion (because a threaded shaft is used).

In order to reduce backlash, you can take a countermeasure such as using a spring to pull the load to one side.

Unfortunately, we do not provide it.

It is a stopper to prevent the shaft from falling off the motor and it has a cushion rubber to prevent collision.

When the motor is not energized, the shaft can be manually stroked by turning this rotor hub directly by hand.

There is no sealability in the anti-rotation part.

You can expect increase in heat generation due to overcurrent (overdrive), resulting burn-out of the coil, demagnetization of the magnet, and shortening the life of bearings.

However, it may be usable if the temperature rise is at less than 80℃ on the motor surface for a short period of energization time.

There is no problem with the surface temperature of the motor up to 80 °C.

To cool down a motor, you can use heat sinks, fans, and the like.

It is possible.
The stroke can be extended as long as the total length of the shaft is up to 150 mm, which is the same to the dimension shown in our catalog.

The unit price may vary depending on the quantity and dimension.

Except for the captive type motor, there is no built-in stopper at both sides, so if the shaft exceeds the effective stroke, it will fall out.
(A captive type motor has a mechanical stopper only on the push-out side.)

Please take countermeasures in your system to prevent the shaft from falling out.

The shaft specification of a linearstep is not disclosed due to its special threaded shape.

The shaft only moves as far as the thread rattles. However, the shaft does not move in reverse by external load.

However, be careful not to overload on the motor, as it may lead to malfunction or damage to the thread .
Up to a certain degree, thrust force and supplied voltage are proportional, however doubling the voltage does not double the thrust.
Depending on the driving conditions, incresing the supplied voltage may cause saturation or worsen the situation. You can use a voltage higher than the rated voltage, but in this case, it is a trade-off for heat generation and thread durability.

The relationship between the wiring colors and the phases under the standard specification conforms to the PF series and PJP series (rotary stepping motors).



As for the direction of operation, CW direction signal is for pushing and CCW direction signal is for pulling.
(Please confirm them in our formal specification sheet.)

The threaded shaft of a linearstep must be used with a fixed rotation.
Anti-rotation for the shaft is mandatory in the mounting mechanism.
*Excluding captive (anti-rotation mechanism attached) series

The following siding thread type linearsteps can.
PFCL25
PFL35T
PJPL2832
PJPL4233

Rotate the shaft by hand to remove it. Replace it carefully so that no dust adheres to the threads.

Specifications and thrust characteristics data for some models are available.
Please contact our sales representative or inquire in the support/inquiry page on NPM website.

The frequency is too fast to run with a linearstep.

The coarsest resolution of a linearstep is 0.05 mm (thread lead: 1.2 mm). (Coarse resolution = fast movement)
The applicable model is PFCL25-24 series with thread lead of 1.2 mm.
When the stroke length is 30 mm for 7 cycles, 30 × 2 × 7 = 420 mm is needed to move in 1 second.
To move 420 mm by advancing by 0.05 mm per pulse, 420 ÷ 0.05 = 8400 pps (pulse/s) is needed.

Use of the motor exposed outdoors may result in failures.

However, the outdoor use would be possible if sufficient measures were taken, such as dust-proofing, moisture-proofing, salt damage measures and the like.
Please determine whether or not to use the motor in your responsibility.

When using a linearstep vertically, use 1/2 or less of the thrust characteristics as a guideline.
In the case of the ball-screw type, the shaft may fall when the excitation is turned OFF depending on the weight of the load.

If it is compatible with 2-phase stepping motors, it should be controllable.
However, we do not verify the operation with products from other manufacturers. Please contact the manufacturers.

No, it is not designed to be used in a vacuum environment.

More specifically,
・The motor generates gases due to the material used inside.
・The motor generates heat and exceeds the allowable temperature because the heat cannot be dissipated.