AEROTECH MX50 MX Multiplier Board User Manual
- June 17, 2024
- aerotech
Table of Contents
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:
- Adjust the pot R14 (refer to Figure 1-4) to set the phase between the input sine and cosine signals to 90 degrees.
- Referencing the oscilloscope connected to test point TP5 (approx. 2.5V), adjust pot R15 to remove offset of cosine signal (TP10).
- Adjust the gain for the cosine signal to be a 4V peak-to-peak signal by adjusting pot R16.
- Referencing the oscilloscope connected to test point TP5 (approx. 2.5V), adjust pot R17 to remove offset of sine signal (TP9).
- 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)
| JP2 | JP3 | Function |
|---|---|---|
| 1 | ||
| 1 | Minimum pulse width = 0.0625 µs (default) Master clock frequency = 16 |
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
| Test Points | Function |
|---|---|
| TP4 | Ground |
| TP5 | Reference (Approx. 2.5V) |
| TP6 | Squared up marker signal from encoder |
| TP7 | Mode signal from Xilinx chip (reserved) |
| TP8 | 1 MHz clock (reserved) |
| TP9 | Amplified input sine wave (0 – 5V) |
| TP10 | Amplified input cosine wave (0 – 5V) |
| TP1 | Output cosine, square wave |
| TP2 | Output sine, square wave |
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)
| Pin | Description | Pin | Description |
|---|---|---|---|
| 1 | Shield | 13 | |
| 2 | 14 | Cosine + | |
| 3 | Encoder +5V (power source from J1) | 15 | Cosine – |
| 4 | Ground | 16 | +5V |
| 5 | Hall effect B * | 17 | Sine + |
| 6 | Marker – | 18 | Sine – |
| 7 | Marker + | 19 | |
| 8 | 20 | Ground | |
| 9 | 21 | Ground | |
| 10 | Hall effect A * | 22 | Home limit * |
| 11 | Hall effect C * | 23 | |
| 12 | CW limit * | 24 | CCW limit * |
| 25 |
- 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
| Pot | Function |
|---|---|
| R14 | Phase adjust between sine and cosine signals |
| R15 | Balance for encoder cosine signal |
| R16 | Gain adjust for encoder cosine signal |
| R17 | Balance for encoder sine signal |
| R18 | Gain adjust for encoder sine signal |
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
| Series | Multiplication Factor | Resistor Network |
|---|---|---|
| MX | 05 | A – Input signal 2Vpp |
| 10 | B – Input signal 7-16 mApp | |
| 25 | C – Input signal-.5 to .5V | |
| 50 |
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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101 Zeta Drive
Pittsburgh, PA. 15238-2897 U.S.A.
Fax number 412-963-7009
AEROTECH, Inc. • 101 Zeta Drive • Pittsburgh, PA. 15238-2897 • USA
Phone 412-963-7470 • Fax :
412-963-7459
Product Service: 412-967-6440;
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References
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