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13.Setup of command division and multiplication ratio — Relation between Electronic Gear and Position Resolution or Travelling Speed

HIGH SPEED IML ROBOT

Keywords:Panasonic A6 Servo Installation Instruction, Panasonic A6 Driver, Panasonic A6 Series Servo Motor Manual

13.Setup of command division and multiplication ratio — Relation between Electronic Gear and Position Resolution or Travelling Speed

Abstract

The setting of the command division and multiplication ratio is the promise of an efficient automation system driven by a Panassonic A6 series of AC servo motor and driver. Here in this chapter we're discussing the relation between Electronic Gear and Position Resolution or Travelling Speed.

panasonic motor

Here we take a ball screw drive as an example of machine.

A travel distance of a ball screw M[mm] corresponding to travel command P1[P], can be described by the following formula (1) by making the lead of ball screw as L[mm]

M=P1 x (D/E) x (1/R) x L ……………(1)

therefore, position resolution (travel distance ΔM per one command pulse) will be described by the formula(2)

ΔM = (D/E) x (1/R) x L ……………(2)

modifying the above formular (2), electronic gear ratio can be found in the formula (3).

D=(ΔM x E x R) x L ……………(3)

Actual travelling velocity of ball screw, V[mm/s] can be described by the formula (4) and the motor rotational speed, N at that time can be described by the formula (5).

V=F x (D/E) x (1/R) x L ……………(4)
N=F x (D/E)/(F x 60) ……………(5)

modifying the above formula (5), electronic gear ratio can be found in the formula (6).

D=(N x E)/(F x 60) ……………(6)

Note →

  1. Make a position resolution, ΔM as approx, 1/5 to 1/10 of the machine positioning accuracy, Δε, considering a mechanical error.
  2. Set up Pr0.09 and Pr0.10 to any values between 1 to 230.
  3. The desired setting can be determined by selecting value of numberator and denominator of electronic gear. However, an excessively high division or multiplication ration cannot guarantee the operation. The ratio should be in a range between 1/1000 and 1000. Excessively high multiplication ratio will cause Err27.2 (command pulse multiplication error protection) due to varying command pulse input or noises, even if the other settings are within the specified range.
  4. 2n Decimal
    20 1
    21 2
    22 4
    23 8
    24 16
    25 32
    26 64
    27 128
    28 256
    29 512
    210 1024
    211 2048
    2n Decimal
    212 4096
    213 8192
    214 16384
    215 32768
    216 65536
    217 131072
    218 262144
    219 524288
    220 1048576
    221 2097152
    222 4194304
    223 8388608

Electronic gear ratio D=ΔM x E x R/L D=Pr0.09/Pr0.10
Lead of ball screw, L=10mm Gear reduction ratio, R=1
Position resolution, ΔM = 0.005mm Encoder, 23-bit (E=223P/r)
0.0005 x 223 x 1/10 = 5 x 223/10 x 104 = 41943040/100000 Pr0.09 = 41943040
Pr0.10 = 100000
Motor rotational speed (r/min), N = F x D/E x 60
Lead of all screw, L=20 mm Gear reduction ration, R=1
Position resolution, ΔM = 0.0005mm Line driver pulse input, 500 kpps Encoder, 23-bit
500000 x 0.0005 x 223 x 1/20 x 1/223 x 60 = 750
Ditto
To make it to 2000 r/min
Electronic gear ratio D = N x E/F x 60 D = Pr0.09/Pr0.10
D = 2000 x 223/500000 x 60 = 2000 x 223/2000 x 500 x 30 = 8388608/15000 Pr0.09 = 8388608
Pr0.10 = 15000
Travel distance per command pulse (mm)
(Position resolution)
ΔM = D/E x 1/R x L
2000 x 223/500000 x 60 x 1/223 x 1/1 x 20 = 0.00133 mm

Related page → • P.4-10 "Details of Parameter"


Hybrid Injection Molding Machine for Laboratory Consumable Petri Dish Injection Molding -- HD300KDY
Haida hybrid Injection Molding Machine
HD300KDY

HD300KDY -- HaiDa Hybrid Injection Molding Machine

No. Name Value
1 Clamping Force 3000 kN
2 Shot Weight 402 g
3 Shot Speed 350 mm/s
4 Screw Diameter 50 mm
5 Opening Stroke 550 mm
6 Space Between Tie Bars 590 x 590 mm
7 Mold Thickness (Min) 220 mm
8 Mold Thickness (Max) 600 mm
9 Pumper Motor 147 kW
10 Heating Capacity 21 kW

Injection Automation Application -- Side Entry Petri Dishs Injection Molding Automation Solution
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SIDE ENTRY PETRI DISH PACKING SOLUTION

Introduction of SWITEK Side Entry Petri Dish Packing System

The SWITEK side entry petri dish packing system is a custom made automation system for the stable production of laboratory consumable plastic petri dish with the picking robot, the petri dish assembly, stacking, packing unit etc. integrated as auniformed system for the efficient and stable production of the petri dish. The system can be custome made for a petri dish mold layout design of 2+2, 4+4, 6+6, 8+8 etc.

Functional Units of SWITEK Top Entry Petri Dish Packing System
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  • (1) -- Side Entry Robotic Arm: The picking arm of the packing system in handling the picking of the petri dish from the injection molding machine and place them on the assembly unit.
  • (2) -- Injection Mold: The core injection unit to shape the petri dish, it can be 2+2, 4+4, 6+6, 8+8 configuragion of the petri covers and bottoms.
  • (3) -- Petri Dish Assembly Unit: Have the cover and bottom of the petri dish assembled and drop it on the conveyor.
  • (4) -- Sorting Conveyor: Lined the assembled petri dish sets for stacking before packing.
  • (5) -- Stacking Station: Have the well assembled petri dishes stacked up as requested (5/10/15/20/25 sets etc.).
  • (6) -- Petri Dish Packing Unit: Have the well stacked petri dish packed and sealed with optional function of vacuume the bag.
  • (7) -- Petri Dish Transfer Robot: Catch the well sealed petri dish bag and drop it to the conveyor.
  • (8) -- Petri Dish Dropping Conveyor: Deliver the well packed petri dish.
  • (9) -- Injection Molding Machine: The injection unit of the whole syste.

Installation Dimension of SWITEK Side Entry Petri Dish Packing System
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Productivity of SWITEK Side Entry Petri Dish Packing Solutions
    Vacuumed Sleeve Packing
  • 10 Sets/Bag --Injection Cycle time: 9s
  • 20 Sets/Bag --Injection cycle: 6s
  • 25 Sets/Bag --Injection Cycle: 5.5s
    Non-vacuumed Sleeve Packing
  • 10 Sets/Bag --Injection Cycle time: 6.5s
  • 20 Sets/Bag --Injection cycle: 6s
  • 25 Sets/Bag --Injection Cycle: 5.5s

Mold Layout Design & Sleeve Size for the Petri Dish Packing System
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Mold Layout Deisgn

petri dish packing solution

Sleeve Size for Package with Vacuum Request

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Sleeve Size for Package without Vacuum Request

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Sleeve (With Mark) Size for Package with Vacuum Request

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Sleeve (With Mark) Size for Package without Vacuum Request

I think you'll have an overall understanding about the SWITEK top/side entry petri dish packing system. If you still have any other question about it or need any help in your petri dish production project, please feel free to contact SWITEK laboratory consumable plastic parts injection molding solutions team for more information.


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