AEROTECH MX50 MX Multiplier Board User Manual

AEROTECH MX50 MX Multiplier Board User Manual

Introduction

The MX multiplier board is designed to be used with sine wave encoders to increase the resolution of the encoder. There are four models available in the MX series, each providing different multiplication factors. Depending on the model, the user can get times 5, times 10, times 25, and times 50 multiplication. When used with an appropriate controller, the quadrature of the output signals provides an additional times 4 factor to yield the effective multiplication of times 20, times 40, times 100, and times 200. An MX multiplier board is shown in Figure 1-1.

Description and Configuration

Figure 1-2. MX Multiplier Board Configuration

Multiplier Signals

The multiplier board accepts either voltage or current input signals and the resistor network values are set according to the input signal type. Refer to Section 1.4.7 for the appropriate values. The outputs are square wave, RS-422 TTL compatible signals. The input marker signal is expected to be active high and located in the middle of the electrical cycle. The plots illustrated in Figure 1-3 show the input and output signals (cosine, sine, and marker) for one electrical cycle of the MX5 multiplier box.
INPUT SIGNALS
(After amplification on the MX board)
COSINE SINE MARKER
OUTPUT SIGNALS
Figure 1-3. Plot of Input and Output Signals

Multiplier Board Setup

The type of input signals determines the components of the headers, RCN1, RCN2, and RCN3. Refer to Section 1.4.7. to select the correct component values. The amplified input signals are available at test points TP9 (sine) and TP10 (cosine) and are set by adjusting the potentiometers. While the motor is turning, perform the following:

1. Adjust the pot R14 (refer to Figure 1-4) to set the phase between the input sine and cosine signals to 90 degrees.
2. Referencing the oscilloscope connected to test point TP5 (approx. 2.5V), adjust pot R15 to remove offset of cosine signal (TP10).
3. Adjust the gain for the cosine signal to be a 4V peak-to-peak signal by adjusting pot R16.
4. Referencing the oscilloscope connected to test point TP5 (approx. 2.5V), adjust pot R17 to remove offset of sine signal (TP9).
5. Adjust the gain for the sine signal to be a 4V peak-to-peak signal by adjusting pot R18.

Hardware Configurations
The amplified input signals at Test points TP9 and TP10 should be configured for normal 4V peak-to-peak signals, see explanation in section 1.3. However, the multiplier board has an acceptable range of amplified input signals from 2V peak-to-peak to 4.5V peak-topeak.
The following sections discuss the hardware used to configure the MX multiplier board.
The hardware is accessible by removing two screws securing the dust cover to the board.

Fault Circuitry (JP1)
The fault circuitry detects input signal magnitudes below .5 Volt peak-to- peak. If a fault is detected, all outputs are set to a high impedance state. Jumper JP1 is set to position 1-2 (default), this enables fault detection. Setting JP1 to position 2-3 defeats fault detection.
For jumper location, refer to Figure 1-4.

Marker Pulse Jumper (JP4)
The marker pulse jumper in the default setting of 1-2 sets the pulse width to the minimum pulse width. In this case, the marker is one output pulse wide and is qualified with the input marker. When set to position 2-3, the marker signal of the encoder is an output and is the same width as the input pulse and no qualification is performed. For jumper location, refer to Figure 1-4.

Pulse Width Jumpers (JP2 & JP3)

Table 1-1. Settings for Pulse Width Jumpers (Rev A and Later)

MHz (default)

1|
1| Minimum pulse width = 0.125 µs Master clock frequency = 8 MHz

1|
1| Minimum pulse width = 0.25 µs Master clock frequency = 4 MHz

1|
1| Minimum pulse width = .5 µs Master clock frequency = 2 MHz

Rev – boards use position 1-2 for jumper “IN” and position 2-3 for jumper “OUT” on jumpers JP2 and JP3.
Figure 1-4. MX Multiplier Board Hardware Locations

Test Points
Table 1-2 lists the test points available on the MX multiplier boards.
Table 1-2. MX Multiplier Board Test Points

Connectors (J1 & J2)
There are two connectors on the MX multiplier board; J1 which receives signals from the encoder and J2 which is the output connector. J1 is a 25-pin female “D” style connector.
J2 is a 25-pin male “D” style connector. Both connectors have the same pinouts, refer to Table 1-3. The MX board only uses the sine, cosine, and marker signals. The rest of the signals are connected directly between J1 and J2. This allows signals like Hall effects and limits to pass directly through the multiplier board, simplifying the wiring. Figure 1-5 is an illustration of the MX encoder cable with the pinouts.
Table 1-3. Pinouts for Connectors (J1 & J2)

• These signals do not connect to the MX multiplier circuitry
  
  NOTE: MAXIMUM CABLE LENGTH IS 10 METERS TWISTED PAIRS ARE 1-4 TURNS / INCH
  Figure 1-5. MX Encoder Cable Pinouts
  1.4.6. Potentiometers
  For the location of the pots on the MX multiplier board, refer to Figure 1-4.
  Table 1-4. MX Multiplier Board Potentiometers
  

The RCN Resistor Network

The components of the RCN resistor network are determined by the type of input signals generated by the encoder. Figure 1-5 shows the configuration of the headers for common input signal types.

Depending on the signal, there will be three of the same.

2V p-p signal R1, R2-73.2K 1% C=15pF

7-16 uApp R1, R2 = 0K C = 33pF

-.5 to 5V signal R1, R243.2K 1% C = 15pF

Figure 1-6. RCN Resistor Network

Output Pulse Clock Speed

The output sine and cosine pulse trains are interpolated to spread out the pulses evenly throughout the 1 µs sample period. The output pulse can be clocked at four different frequencies depending on the input frequency and the pulse width jumper settings. The output clock can be 4 MHz, 8 MHz, or 16 MHz. The following chart in Figure 1-6 shows the count spacing over a 1 µs period with the clock set to 16 MHz.

Figure 1-7. Count Spacing

MX Multiplier Board Specifications

The specifications for the MX multiplier board models are shown in Table 1-5.
Table 1-5. MX Multiplier Board Models and Specifications

Model| Interpolation| Clock Freq. (MHz)| Maximu m input freq. (KHz)| Minimum edge separation| Minimum pulse width ( m s)| Power Supply
---|---|---|---|---|---|---
MX5| x5| 16| 500| .0625 ms| .0625| 5V ±5% (180 mA)
| 8| 400| .125 ms| .125| 5V ±5% (180 mA)
| 4| 200| .25 ms| .25| 5V ±5% (180 mA)
| 2| 100| .5 ms| .5| 5V ±5% (180 mA)
MX10| x10| 16| 400| .0625 ms| .0625| 5V ±5% (180 mA)
| 8| 200| .125 ms| .125| 5V ±5% (180 mA)
| 4| 100| .25ms| .25| 5V ±5% (180 mA)
| 2| 50| .5 ms| .5| 5V ±5% (180 mA)
MX25| x25| 16| 160| .0625 ms| .0625| 5V ±5% (180 mA)
| 8| 80| .125 ms| .125| 5V ±5% (180 mA)
| 4| 40| .25ms| .25| 5V ±5% (180 mA)
| 2| 20| .5 ms| .5| 5V ±5% (180 mA)
MX50| x50| 16| 80| .0625 ms| .0625| 5V ±5% (180 mA)
| 8| 40| .125 ms| .125| 5V ±5% (180 mA)
| 4| 20| .25ms| .25| 5V ±5% (180 mA)
| | 2| 10| .5 ms| .5| 5V ±5% (180 mA)

Physical Dimensions
Figure 1-8 illustrates the dimensions of the MX multiplier.

Figure 1-8. MX Multiplier Dimensions

Part Number and Ordering Information
The multiplication factor desired and input signal generated by the encoder will determine what MX multiplier board and resistor network to order. Table 1-6 provides information regarding part numbers for ordering the correct MX multiplier board and resistor network.

Table 1-6. MX Multiplier Board and Resistor Network Part Numbers

EXAMPLE:

MX-10-B
Input signal 7 -16 µApp
Multiplication factor, times 10

APPENDIX A: WARRANTY AND FIELD SERVICE

In This Section:

• Laser Product Warranty
• Return Products Procedure
• Returned Product Warranty Determination
• Returned Product Non-warranty Determination
• Rush Service
• On-site Warranty Repair
• On-site Non-warranty Repair

Aerotech, Inc. warrants its products to be free from defects caused by faulty materials or poor workmanship for a minimum period of one year from date of shipment from Aerotech. Aerotech’s liability is limited to replacing, repairing or issuing credit, at its option, for any products which are returned by the original purchaser during the warranty period. Aerotech makes no warranty that its products are fit for the use or purpose to which they may be put by the buyer, where or not such use or purpose has been disclosed to Aerotech in specifications or drawings previously or subsequently provided, or whether or not Aerotech’s products are specifically designed and/or manufactured for buyer’s use or purpose. Aerotech’s liability or any claim for loss or damage arising out of the sale, resale or use of any of its products shall in no event exceed the selling price of the unit.

Laser Products
Aerotech, Inc. warrants its laser products to the original purchaser for a minimum period of one year from date of shipment. This warranty covers defects in workmanship and material and is voided for all laser power supplies, plasma tubes and laser systems subject to electrical or physical abuse, tampering (such as opening the housing or removal of the serial tag) or improper operation as determined by Aerotech. This warranty is also voided for failure to comply with Aerotech’s return procedures.

Return Procedure
Claims for shipment damage (evident or concealed) must be filed with the carrier by the buyer. Aerotech must be notified within (30) days of shipment of incorrect materials. No product may be returned, whether in warranty or out of warranty, without first obtaining approval from Aerotech. No credit will be given nor repairs made for products returned without such approval. Any returned product(s) must be accompanied by a return authorization number. The return authorization number may be obtained by calling an Aerotech service center. Products must be returned, prepaid, to an Aerotech service center (no C.O.D. or Collect Freight accepted). The status of any product returned later than (30) days after the issuance of a return authorization number will be subject to review.

Returned Product Warranty Determination
After Aerotech’s examination, warranty or out-of-warranty status will be determined. If upon Aerotech’s examination a warranted defect exists, then the product(s) will be repaired at no charge and shipped, prepaid, back to the buyer. If the buyer desires an air freight return, the product(s) will be shipped collect. Warranty repairs do not extend the original warranty period.

Appendix A

Returned Product Non warranty Determination :

After Aerotech’s examination, the buyer shall be notified of the repair cost. At such time the buyer must issue a valid purchase order to cover the cost of the repair and freight, or authorize the product(s) to be shipped back as is, at the buyer’s expense. Failure to obtain a purchase order number or approval within (30) days of notification will result in the product(s) being returned as is, at the buyer’s expense. Repair work is warranted for (90) days from date of shipment. Replacement components are warranted for one year from date of shipment.

Rush Service

At times, the buyer may desire to expedite a repair. Regardless of warranty or out-of warranty status, the buyer must issue a valid purchase order to cover the added rush service cost. Rush service is subject to Aerotech’s approval.

On-site Warranty Repair

If an Aerotech product cannot be made functional by telephone assistance or by sending and having the customer install replacement parts, and cannot be returned to the Aerotech service center for repair, and if Aerotech determines the problem could be warranty related, then the following policy applies:

Aerotech will provide an on-site field service representative in a reasonable amount of time, provided that the customer issues a valid purchase order to Aerotech covering all transportation and subsistence costs. For warranty field repairs, the customer will not be charged for the cost of labor and material. If service is rendered at times other than normal work periods, then special service rates apply.

If during the on-site repair it is determined the problem is not warranty related, then the terms and conditions stated in the following “On-Site Non- Warranty Repair” section apply

On-site Non-warranty Repair

If any Aerotech product cannot be made functional by telephone assistance or purchased replacement parts, and cannot be returned to the Aerotech service center for repair, then the following field service policy applies:

Aerotech will provide an on-site field service representative in a reasonable amount of time, provided that the customer issues a valid purchase order to Aerotech covering all transportation and subsistence costs and the prevailing labor cost, including travel time, necessary to complete the repair.

Company Address

Aerotech, Inc.
101 Zeta Drive
Pittsburgh, PA 15238-2897
USA
Phone: 412-963-7470
Fax: 412-963-7459
TWX: 710-795-3125

B

Board configuration, 1-1

C

Configuration
System, 1-1
Connectors, 1-5
Count spacing, 1-9

H

Hardware configurations, 1-3

I

Introduction, 1-1

M

Marker pulse jumper, 1-3
Multiplication, 1-1
Multiplier signals, 1-2

O

Order information, 1-11
Output pulse
clock speed, 1-8

P

Part numbers, 1-11
Physical dimensions, 1-11
Pinouts
Connector, 1-6
Potentiometers, 1-7
Pots, 1-7

S

Signals, 1-2
Specifications, 1-10

T

Test points, 1-5

READER’S COMMENTS

MX Multiplier Board Option Manual
P/N EDO108, February 16, 2000

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AEROTECH, Inc. • 101 Zeta Drive • Pittsburgh, PA. 15238-2897 • USA
Phone 412-963-7470 • Fax : 412-963-7459
Product Service: 412-967-6440; 412-967-6870 (Fax); 412-967-6427 (BBS)

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