ACTUATOR
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NB's BG type is a compact single axis actuator which integrates a slide guide and precision ball screw. BG type offers compact dimensions and outperforms conventional positioning tables. This is made possible by a unique "U" shaped guide rail and slide block which provides multiple functions of a guide block and a ball screw nut combined into a single unit. The "U" shaped guide rail offers high rigidity against bending moment. This structural feature allows for integrated framework of machinery or equipment and can be cantilevered. Additionally, the slide block contains 4 ball circuits...

PART NUMBER STRUCTURE Part number for BG type is described as follows. © ball screw lead ^ Drive block is located closest to motor bracket side. © guide rail length © motor bracket (refer to page H-17~) The number in the square , □ .after suffix RA , RB or RC indicates the mounting direction code. OO sensor cable outlet position In case of multiple options, add + between each option. Example: (PS+LB+PNP) Grease is applied to slide guide, ball screw, and angular ^3: LB is applied to steel parts except for aluminum parts For BG15, LB is applied to steel parts except for the drive block,...

ALLOWABLE SPEED Allowable speed of BG type is subject limited by the critical speed of the ball Table H-2 Allowable Speed to the type of motor and operating conditions. The speed may also be screw. Use caution when operating at high speeds or using long rails. Figure H-5 Guide Rail Length and Allowable Speed guide rail length mm The mass of the BG type is listed in Table H-3 and slide block mass is listed in Table H-4. Table H-3 Mass of BG type Actuator A: 1 long block B: 2 long blocks C: 1 short block D: 2 short blocks Table H-4 Mass of Block Mass stated "with top cover" includes mass of...

Table H-7 shows accuracy of BG type. Above values are measured by using our selected motors. ^ Above specifications are based on using NB standard grease. Other grease may cause deviations. The values in the parentheses are positioning repeatability when used with return pully unit. Positioning Repeatability After setting an arbitrary position, from one end, move the drive block to this position and measure the stop position. Repeat the positioning and measurement process 7 times with respect to the setting position at the midpoint and near both ends of travel. Take the maximum difference...

RATED LIFE To obtain the rated life of the BG type, calculate the rated life of the guide portion, ball screw portion and support bearing portion. Use the minimum value as the rated life of the BG type. A. Life of Guide Portion Use the following equation for calculating the rated life of guide portion. LG: rated life (km) fc: contact coefficient (refer to TableH-8) fw: applied load coefficient (refer to TableH-9) C: basic dynamic load rating (N) PT: calculated load applied to one block (N) Before calculating the rated life using the equation (1), the calculated load applied to one block...

i) during uniform motion (PTC) Note that the values of (MpL+m-QVZ) and (MyL+m-QVX) will be treated as 0 (zero) when the calculated value is negative. Note that the values of (MpL+nvavZ) and (MyL+nvavX) will be treated as 0 (zero) when the calculated value is negative. In case of load coming from different direction other than the direction shown in the drawing W(m), please contact NB. PTC: calculated load applied to a block during uniform motion(N) PT3: calculated load applied to a block during accelerating(N) PTd: calculated load applied to a block during decelerating(N) n: number of...

• BG type contains a lithium soap based grease. (Multemp PS No.2, KYODO YUSHI) Apply similar type of grease for the lubrication as required depending on the operating conditions. • Use the grease fitting to lubricate the slide block. For ball screw portion apply grease directly to the surface of screw shaft. >SBG15 slide block has 02mm oil holes instead of grease fitting. • Unless otherwise instructed, a grease fitting is located as shown in Figure H-15. •The grease can be changed to a high function type by adding a special grease option at the end of the part number. Please refer to Table...

Figures inside( ) indicates mass of the motor mount adapter plate. Adapter Plate Al (Mass: 9g) Recommended Coupling: XBW-15C2(Nabeya Bi-tech Kaisha) Adapter Plate AS (Mass: 8g) Recommended Coupling: LAD-15C(Sakai Manufacturing Co., Ltd.; Adapter Plate A3 (Mass: 9g) Recpmmended Cpupling: LAD-15C(Sakai Manufacturing Co., Ltd.] Adapter Plate A4 (Mass: 8g) Recommended Coupling: LAD-15C(Saka Manufacturing Co Ltd ] Adapter Plate A5 (Mass: 4g) Recommended Coupling: XBW-15C2(Nabeya Bi-tech Kaisha) Adapter Plate A6 (Mass: 4g) Recommended Coupling: XBW-15C2(Nabeya Bi-tech Kaisha) (opposite side)...

Figures inside( ) indicates mass of the motor mount adapter plate. Adapter Plate Al (Mass: 38g) Recommended Coupling: SFC-010DA2(Miki Pulley Co . Ltd) Adapter Plate A3 (Mass: 39g) Recommended Coupling: SFC-010DA2(Miki Pulley Co., Ltd.) Adapter Plate A5 (Mass: 26g) Recommended Coupling: SFC-010DA2(Miki Pulley Co., Ltd.) Adapter Plate A6 (Mass: 1 Og) Recommended Coupling: SFC-010DA2(Miki Pulley Co., Ltd.) Adapter Plate A8 (Mass: 1 2g) Recommended Coupling: SFC-010DA2(Miki Pulley Co., Ltd.) Adapter Plate A9 (Mass: 14g) Adapter Plate AA(Mass: 46g) Recommended Coupling: SFC-010DA2(Miki Pulley...

Figures inside( ) indicates mass of the motor mount adapter plate. Adapter Plate Al (Mass: 28g) Recommended Coupling: SFC-010DA2(Miki Pulley Co., Ltd.) Adapter Plate A3 (Mass: 24g) Recommended Coupling: SFC-010DA2(Miki Pulley Co., Ltd.) Adapter Plate A5 (Mass: 32g) Recommended Coupling: SFC-010DA2(Miki Pulley Co., Ltd.) Adapter Plate A6 (Mass: 16g) Recommended Coupling: SFC-010DA2(Miki Pulley Co., Ltd.) Adapter Plate A8 (Mass: 21 g) Recommended Coupling: SFC-010DA2(Miki Pulley Co., Ltd.) Adapter Plate A9 (Mass: 21 g) Recommended Coupling: SFC-010DA2(Miki Pulley Co., Ltd.) Adapter Plate AA...