Nymotion LLC

Linear Devices & Systems - Since 1986
External Leadscrew Stepper and Servo Slides

Made in the USA
Sales & Application Support:  800 643-6240
ELS14 ~ Typical OEM Mounting
External Leadscrew Slides are an excellent alternative to conventional slides in tight-fit environments.  The key advantages are simplicity, space and cost savings.  ELS slides require no coupler nor near bearing system to support the screw. 

  • Integrated IP67 home sensor
  • Size 8, 11, 17, 23 and 34 actuator frame sizes
  • Open Loop Stepper w/ Speed and Position Mode Control
  • Closed Loop Servo w/ Speed, Position and Torque Mode Control
  • Anodized or Electro less Ni Housing and Tooling Plate
  • Light weight ceramic or precision ground stainless shafts
  • ELS lead options range from 0.635 mm/rev to 25.4 mm/rev.  Contact Nymotion for further information.
  • ELS Stepper Slides provide:
    • Micron and submicron positioning.
    • High Accuracy with Outstanding Repeatability
  • ELS Servo Slides provide:
    • Micron and submicron positioning
    • Quicker, quieter motion profiles with no resonance
    • Dynamic position maintenence
    • Torque mode control.  "Move element A into B, maintain 10 lbs force for 30 seconds ..."
  • ELS Slides are based on HaydonKerk External Linear Actuators, plane bearing carriages and precision ground 303 stainless shafting.  The target applications are high duty cycle (millions of strokes) maintenance-free automation applications.  Pick-and-place, dispensing, scanning and focus adjust.
    Greater repeatability.  +/- 1 to 5 microns (depending on lead and bearing selection.
    • Programmable motion control.
    • Long stroke Z (lift) applications.
  • ELS assemblies have multiple threaded and c-bored mounting options with precision slip fit dowels.
  • Custom mounting plates with Z axis mounts and turn-key drive/controller kits are available on request.
  • Clean Room and Vacuum Versions
 
Size 8
Size 11
Size 17
Size 23
 ELS Stepper Slides ESL08-L-2.5V-T  ELS11-L-2.1V-T  ELS17-L-2.33-T  ELS23-L-3.25V-T
Lead (L) mm/rev:
  Consult HaydonKerk Web Site
 T (Travel):
  50 - 100 mm  50 - 152 mm  50 - 240 mm  50 - 240 mm
 
 ELS Servo Slides  ELS08S-L-T  ELS11S-L-T  ELS17S-L-T  ELS23S-L-T
Lead (L) mm/rev:
   Consult HaydonKerk Web Site
T (Travel):
  50 - 100 mm  50 - 152 mm  50 - 240 mm  50 - 240 mm
Encoder Options
(Rotary):
  E4-360 (1440 ppr)
 E8P-512 (2048 ppr)		  E8P-512 (2048 ppr)
 E5-1250 (5000 ppr)		  E5-1250 (5000 ppr)  E5-1250 (5000 ppr)

  • ELS Travel.  Standard strokes provided in the chart.  Longer strokes are available but invite problems at higher speeds.  Contact Nymotion for longer travel (stroke), sizing guidance, cantilevered loads and optional recirculating ball linear bearings.
  • Prototype Guidance:  Whether or not you are planning to use a NYT Hybrid Servo drive, always order “servo ready” HaydonKerk linear actuators with installed and tested E8P-512 or E5-1250 encoders.  With open loop controls, encoded hybrid linear actuators allow position verification when testing worse case motion profiles.  If there are lost steps, performance or audible noise issues contact Nymotion for NYT hybrid servo guidance and testing.   
  • ELS Step and Servo Slides use identical bipolar, low inductance, hybrid linear actuators.
    • ELS Step Slides are driven with widely available microstepping drives and drive/controllers.  Encoder feedback is an option.  NYT Series microstepping drives are highlighted below.
    • ELS Servo Slides are driven with NYT Series Hybrid Servo drive/controllers.  Servo slides require a reasonably high line count, single ended or differential rotary or linear encoders.   Recommended rotary encoders:  E8P-512 (2048 ppr) or E5-1250 (5000 ppr w/ Index).  In general, higher line counts yield better results. 
  • Homing Techniques
    • Recommended:  An optional NPN (PNP on request) prox sensor (home) is available.  This sensor is integrated into the ELS housing and activates as the moving sensor engages an end brk.   Homing is repeatable to +/- 5 μm. 
    • NYT Series Microstepping Drive/Controllers feature home-on-a-hard-stop algorithms.  Using this technique, homing is repeatable to +/- 50 μm (or better).
    • NYT Series Hybrid Servo Drive/Controllers have a more sensitive home-on-a-hard-stop algorithm.  Using this technique, homing is repeatable to +/- 30 μm (or better).  When combined with a move-to-encoder index routine, homing is repeatable to +/- 5 μm.
    • Homing speeds impact repeatability.
ELS23

 NYT Series
 Drive/Controllers		  TMCM-110/SG  TMCM-111/SG  NYT3X-AP-STP  NYT1X-AP  NYT2X-AP  NYT3X-AP-Servo
 Number of Axis:
  1  1  3  1  2  3
Control Mode:
  Stepper  Stepper  Stepper  Stepper or Servo  Stepper or Servo Stepper or Servo 
Supply Voltage:
  7 - 34Vdc  7-28Vdc  7-28Vdc  12-28Vdc  12-28Vdc  12-28Vdc
Current:
  1.1A rms/
 1.5A peak		  2.8A rms/
 4A peak		  1.1A rms/
 1.5A peak		  See Module Options  See Module Options  See Module Options
Step Resolution:
  FS - /16 μs  FS - /64 μs  FS - /16 μs      
Servo Resolution:
        See Encoder Options  See Encoder Options  See Encoder Options

Module Options

 Module  TMCM-103  PIM2401  PIM2403
Current:
  2A rms/2.8A peak  1A rms/3A peak  3A rms/6A peak
μstep:
  /64  /256  /256
Servo:
  No  Yes  Yes

Servo Resolution is a function of encoder line count * 4
 Encoder  E4-360  E8P-512  E5-1250
Line Count:
  360  512  1250
Counts (Pulses)/Rev:
  1440 ppr  2048 ppr  5000 ppr
Index (1 per rev):
  No  No  Yes


Resolution Notes:  Given a 6.25 mm/rev (0.25 in/rev) Lead 

Open Loop Microstepping @ /16 provides 200 FS/REV * 16 MS/FS = 3200 μs/REV.  Therefore:  6.35 mm/rev / 3200 μs/FS ~ 0.002mm or 2 μm / μs
Closed Loop Servo w/ 2048 ppr:  6.35 mm/REV / 2048 ppr ~ 0.003 mm or 3 μm / encoder count
Closed Loop Servo w/ 5000 ppr:  6.35 mm/REV / 5000 ppr ~ 0.00127 mm or 1.27 μm / encoder count