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AMS DCB-274 - page 1
REVISION DATE: 07/05/0 6 DCB - 274 USERS GUIDE www.stepcontrol.com Nashua, NH 03063 ...
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AMS DCB-274 - page 2
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AMS DCB-274 - page 3
REVISION DATE: 07/05/0 6 ...
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AMS DCB-274 - page 4
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AMS DCB-274 - page 5
ADVANCED MICRO SYSTEMS, INC. DCB - 274 USERS MANUAL i Table of Contents Hardware Introduction ............................................................................................................................. 1 Product Overview ............................................................................................................... ...
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AMS DCB-274 - page 6
ADVANCED MICRO SYSTEMS, INC. DCB - 274 USERS MANUAL ii T (Trip Point) ......................................................................................................................... 49 V (Set Slew Speed) ............................................................................................................... 50 W (Wait) ............ ...
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AMS DCB-274 - page 7
ADVANCED MICRO SYSTEMS, INC. HARDWARE 1 Introduction Thank you for using a DCB - 274 Stepper Motor Driver/Controller from ADVANCED MICRO SYSTEMS, INC. This unit is designed to provide years of reliable, accurate and cost - effective motion control. As with all AMS products, the DCB - 274 is backe d by over two decades of manufacturing excellence an ...
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AMS DCB-274 - page 8
ADVANCED MICRO SYSTEMS, INC. HARDWARE 2 Product Overview The DCB - 274 combines efficient bi - polar chopper Driver circuitry with AMS’ new, powerful SMC - 27X2 Micro - co ntroller on a single, heat sink mounted board, to operate small to mid - size stepping motors. It is designed fo r low cost O.E.M. applications; yet includes many enhanced oper ...
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AMS DCB-274 - page 9
ADVANCED MICRO SYSTEMS, INC. HARDWARE 3 Required Hardware for Operation Qty Unit Model # Description 1 Axis DCB - 274 Driver - Controller Board 1 System User defined +24 to 40Vdc power supply 1 Axis SIN - 7 RS - 232 serial adapter (single axis) or 1 System SIN - 8 RS232/RS422 serial adapter (multi - axis) or 1 System SIN - 10 Intelligent serial ada ...
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AMS DCB-274 - page 10
ADVANCED MICRO SYSTEMS, INC. HARDWARE 4 Out of t he Box – Quick Start The DCB - 274 is supplied with mating motor, power supply and I/O connectors. The SIN - (n) (chosen serial adapter) is supplied with a mating cable and terminator, if required. Equipment Check List 1. A computer with available serial port . 2. Installed serial communications so ...
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AMS DCB-274 - page 11
ADVANCED MICRO SYSTEMS, INC. HARDWARE 5 After Sign - on Enter X<CR> The parameters are displayed. The last characters displayed will be “n= “ followed by the axis “name” character, usually “A.” To change the name: 1. Turn off power, allow discharge. 2. Turn on power. 3. Depress the desired “name” key, for instance “B.” 4. ...
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AMS DCB-274 - page 12
ADVANCED MICRO SYSTEMS, INC. HARDWARE 6 “Do’s, Don’ts and Important Notes” • NEVER connect or disconnect motor wires while power is supplied. • When using a 6 lead motor be sure to insulate/isolate unused wires. • The physical direction of the motor with respec t to the direction input will depend on the connection of the motor windin ...
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AMS DCB-274 - page 13
ADVANCED MICRO SYSTEMS, INC. HARDWARE 7 Multi - axis Serial Interface Connection DCB-274 #1 DCB-274 #”N” SERIAL INTERFACE ADAPTER SIN-8 OR SIN-10 BLC-51-XX INTERCONNECT CABLE SERIAL IN SERIAL OUT TERMINATOR PLUG I.O. Connections (J1, J4) The DCB - 274 has a robust set of input and output signals. Two connectors (J1 and J4) provide dedicated inp ...
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AMS DCB-274 - page 14
ADVANCED MICRO SYSTEMS, INC. HARDWARE 8 Pin 7 - VIO Reference Input This signal defines the input and output voltage range. A “default” voltage of 4.6 volts is derived from the internal +5 - volt supply, via a diode . Any external load must be limited to several mA. You may apply an external, higher “VIO” voltage, if appropriate to the appl ...
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AMS DCB-274 - page 15
ADVANCED MICRO SYSTEMS, INC. HARDWARE 9 Typical User Input Circuit (Step, Direction, Ports 1, 2, 3, 4 (used as an input), Jog (3), Limits, Home, Go and Soft Stop) Output Ports Two user outpu t ports are provided on the DCB - 274 with a power FET output circuit capable of sinking up to 2 amps DC. They cannot be converted to a sourcing mode. If a sou ...
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AMS DCB-274 - page 16
ADVANCED MICRO SYSTEMS, INC. HARDWARE 10 As an output (as shipped) the signal can be redefined as a stepping pulse output with the “l 2” (lower case L) command. This also defines P5 as a direction output signal. Port 5 Port 5 is an output port/driver, rated at 2 - amps. The output signal can be redefined as a direction output with the “l 2” ...
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AMS DCB-274 - page 17
ADVANCED MICRO SYSTEMS, INC. HARDWARE 11 Step and Direction Inputs (J1) A 10k pull - up resistor allows open - collector circuits to be used. The inputs will withstand in excess of 24 volts. Pin Signal 6 Ground, common with the power supply input 11 Step pulse input 12 Direction inp ut The recommended step input is a negative going pulse 5 volt TTL ...
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AMS DCB-274 - page 18
ADVANCED MICRO SYSTEMS, INC. HARDWARE 12 Typical Wiring Diagrams for Step Motors Fig. A: Series winding for higher torque and lower current. The inductance is 4 times that of the parall el mode, reducing the maximum obtainable speed. Fig. B: Parallel winding for better high - speed performance but requires higher drive current. A 4 - wire motor is ...
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AMS DCB-274 - page 19
ADVANCED MICRO SYSTEMS, INC. HARDWARE 13 Specifications Electrical Output Current (maximum)………………. 4.0 Amps Chopping Frequency...................…………... 20kHz Supply Volt age............................…….……. +24 to 40 Vdc Motor Step Resolution..............……………. 1/8,1/4,1/2, Full, Wave Non - Volatile Memory.. ...
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AMS DCB-274 - page 20
ADVANCED MICRO SYSTEMS, INC. HARDWARE 14 Physical Dimensions PWR / MTR 7 PIN 1/O 12 PIN I/O SERIAL IN SERIAL OUT Heat sink mounting bracket 2.50 4.13 0.75 0.75 0.75 4.70 5.20 1.38 0.22 SLOTS ACCOMODATE 10-32 MOUNTING HARDWARE NOTE: ALLOW 0.5 INCH CLEARANCE ON ALL CONNECTORS FOR EXTERNAL WIRING ...
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AMS DCB-274 - page 21
ADVANCED MICRO SYSTEMS, INC. SERIAL INTERFACE 15 Overview This Application covers the serial communication design for ADVANCED MICRO SYSTEMS, INC. (AMS) intelligent control products. These products include complete packaged systems, OEM boards, su b - assemblies, and I.C.’s. The basic design has remained constant over 20 years. All AMS products a ...
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AMS DCB-274 - page 22
ADVANCED MICR O SYSTEMS, INC. SERIAL INTERFACE 16 Single axis, RS - 232 connection using AMS SIN - 7 adapter The other method, called “daisy chain,” is for multi - axis applications and is NOT recommended by AMS. Daisy chain is accomplished by interconnecting one or more axis in “series.” Her e, the TXD output of the first axis is connected ...
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AMS DCB-274 - page 23
ADVANCED MICRO SYSTEMS, INC. SERIAL INTERFACE 17 RS - 422 (Party Line) Hardware AMS “Party Line” communication is an RS - 422 design that uses RS - 485 rated circuits. This interconnect is comparable to a LAN configuration. The hybr id design merges the best of both EIA specifications and maintains compatibility with EIA RS - 422 and features: ...
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AMS DCB-274 - page 24
ADVANCED MICR O SYSTEMS, INC. SERIAL INTERFACE 18 AMS offers two adapters to facilitate party line connect; models SIN - 8 and SIN - 10. The SIN - 10 costs slightly more but is so powerful that the software programming is simplified. Some operating systems (Windows 2000) are close to impossible to program properly. SIN - 8 Serial Adapter The SIN - ...
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AMS DCB-274 - page 25
ADVANCED MICRO SYSTEMS, INC. SERIAL INTERFACE 19 SIN - 10 Intelligent Serial Adapter The SIN - 10 is an intelligent serial line converter that simplifies application software development and improves overall performance. Dual, independent UARTS (COM ports) permit spooling commands at rates between 1200 and 115k baud. Specific operating instructions ...
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AMS DCB-274 - page 26
ADVANCED MICR O SYSTEMS, INC. SERIAL INTERFACE 20 4. Party Select (pin 8). Each axis tests this inp ut after reset (power up or in response to a ^C command) to determine either single or party line mode. Single mode (ONLY one axis connected) is used for debug, programming for stand - alone use or assignment of party line “name”. The SIN - 8 has ...
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AMS DCB-274 - page 27
ADVANCED MICRO SYSTEMS, INC. SERIAL INTERFACE 21 Operating systems like Windows NT and Windows 2000 prevent programmers from direct access of the hardware. The programmer is forced into passing instructions via “mail - boxes” to perform I/O functions, a slow and inefficient process. Baud Rate AMS has introduced a number of motion control produc ...
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AMS DCB-274 - page 28
ADVANCED MICR O SYSTEMS, INC. SERIAL INTERFACE 22 3. Strike the SPACE BAR key. The controller should sign on with the software version number Vx.xx. If not, enter a (^C) (Reset) and strike the SPACE BAR key again. The “reset” message is generated by easi.exe, not the axis output. If sign - on does not occur: a. Verify all connections. b. Insure ...
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AMS DCB-274 - page 29
ADVANCED MICRO SYSTEMS, INC. SERIAL INTERFACE 23 Axis Name Assignment Whenever the application is controlled via a “hos t” computer the proper protocol (handshake) MUST be used. Either the programmer must write the necessary serial, echoed character - by - character software (driver), or implement a SIN - 10 for the proper handshake. In any cas ...
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AMS DCB-274 - page 30
ADVANCED MICR O SYSTEMS, INC. SERIAL INTERFACE 24 The initial input sequence MUST be a Line Feed (LF) characte r followed by a valid “name” character in the standard ASCII collation sequence. Once the recognized sequence is received, the controller will assume the name until a hardware reset is made. The first axis in the string will output the ...
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AMS DCB-274 - page 31
ADVANCED MICRO SYSTEMS, INC. SERIAL INTERFACE 25 Edit Program Example: It is desired to change instruct ion number 21 from 500 steps to 5,000 steps: Enter Remark P21<CR> Edit instruction 21. R5000 Move 5,000 steps in the “+” direction, relative to Origin. “ESCape” Terminates Edit mode. Note: Caution should be exercised when making Pro ...
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AMS DCB-274 - page 32
ADVANCED MICR O SYSTEMS, INC. SERIAL INTERFACE 26 The party line sequence can be sent using the dumb terminal. Caution must be used because any typo’s cannot b e corrected with a backspace, as is possible in the single axis mode. You must cancel with the ESCape and start over. Remember ESC is a global abort character. Party Line Startup The progr ...
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AMS DCB-274 - page 33
ADVANCED MICRO SYSTEMS, INC. SERIAL INTERFACE 27 Anatomy of Instruction Execution This information is intended to familiarize the programmer with the internal operations involved in executing a command. For each MOTION command there are four cycles; Entry, Execution, Result, and Completion. Other commands have three cycles; Entry, Execution and Res ...
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AMS DCB-274 - page 34
ADVANCED MICR O SYSTEMS, INC. SERIAL INTERFACE 28 Interrupt Commands Interrupt commands are single character commands that will interrupt the operation in process as follows: Abort Any action command may be terminated using the ESCape character . Process Resulting Action Command line input Clear input buffer. Program mode Exit without inserting “ ...
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AMS DCB-274 - page 35
ADVANCED MICRO SYSTEMS, INC. SERIAL INTERFACE 29 Q ueued Index Cycle Resulting From +, - , R Commands Constant Velocity Cycle Resulting From M Command Constant Velocity Cycle From 2nd M Command Execution Times The time for a complete cycle between command entry and resul t is variable, depending on number of data bytes, command type, and motion in ...
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AMS DCB-274 - page 36
ADVANCED MICR O SYSTEMS, INC. SERIAL INTERFACE 30 ...
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AMS DCB-274 - page 37
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 31 Non - Volatile Memory Detai ls The SMC - 27X2 uses the X24C16, a 2048 byte EEPROM. A worst case of 4 bytes per instruction yields a capacity of 500 commands. These devices are rated to retain data for 100 years. As with all EEPROMS, the number of times it may be re - programmed is limi ted. Each t ...
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AMS DCB-274 - page 38
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 32 Default Table The following default values are written to NV memory after the ‘Clear’(C 1) command: Parameter Value Initial Velocity (I) 800 SPS Slew Velocity (V) 10,000 SPS Divide Factor (D) 1 Ramp Slope (K) 5 Decay threshold (b) 30 Jog Speeds (B) 90/600 Trip Point (T) Off Mode (H) 1/4 micro ...
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AMS DCB-274 - page 39
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 33 Command Format Description Function Type NV Bytes Command Mne monic Data 1 (Range) Data 2 (Range) Result Where: Command: Keystroke Function: Functional description of command Type: Immediate = Direct execution Program = Executable in stored program Global = All axis present Default = Initial param ...
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AMS DCB-274 - page 40
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 34 An example of this command within a program in conjunction with the Loop on Port command as explained later is: P 0 Enter program mode. M 2000 Move at a con stant step rate of 2000 SPS. L0 0 Loop to memory address location 0 until port 1 is low. @ Decelerate and stop program execution. P Exit prog ...
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AMS DCB-274 - page 41
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 35 The PLC option flag 8 has no affect on the output behavior. Port 4 as an output (as shipped): 1. Install JP1and JP2 in off (storage) position. 2. Ins ure that P4 input option flag 32 (“ l ” command) is off. Port 4 is controlled by the “A 8” (flag 8) command and read back with the A 129 com ...
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AMS DCB-274 - page 42
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 36 Function Type NV Bytes Set Jog Speeds Default, Immediate, Program 3 Command B Mnemonic (Name) B (n1, n2) Data 1 Slow Speed (0 - 255) Data 2 High Speed (0 - 255) Result None B (Set Jog Speeds) These two numbers represent the speeds to use for jog inputs. The first is usually a lowe r speed. The sec ...
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AMS DCB-274 - page 43
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 37 Multiple variables that interact include: • Operating step speed range • Step resolution • Motor size and characteristics • Load inertia and load damping affects • Supply voltage • Motor current setting • Acceleration and deceleration rates Once the optimal settings are determined, t ...
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AMS DCB-274 - page 44
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 38 Function Type NV Bytes Find Home Immediate, Program 3 Command F Mnemonic (Name) F (n, d) Data 1 SPS (40 - 36,000) Data 2 Direction (0,1) Result None F (Find Home) The special Home algorithm is intended to eliminate mechanical hysteresis typical ly found in many switches, encoders and is generally ...
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AMS DCB-274 - page 45
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 39 If “t” is a one, the TRACE mode is turned on. A display of the current step being executed is produced while the program is running. The list format is the sa me as that of the “Q” command The TRACE mode will be in effect until the program execution terminates or until an embedded ‘Go’ ...
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AMS DCB-274 - page 46
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 40 Function Type NV Bytes Set Step Size Resolution Default, Immediate, Program 2 Command H Mnemonic (Name) H (n) Data 1 0 - 5 Data 2 None Result N one H (Step Resolution) This command selects step size resolution. The SMC - 27X2 has an internal lookup table of up to 32 bytes corresponding to 1/8 step ...
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AMS DCB-274 - page 47
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 41 Function Type NV Bytes Restart Special Trip Default, Program 5 Command i Mnemonic (Name) i (n) Data 1 Next Trip Position ±8,388,607 Da ta 2 Port (0 - 63)* Result None i (lower case I ; Restart Special Trip ) See lower case “k” command. *Actual values are determined by the hardware configurati ...
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AMS DCB-274 - page 48
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 42 The following two examples are of ra mped indexes, each 2000 steps with I=400, V=5000, but different “K” values; K50 5 and K5 5: Note: The default value of "K" is 5 (Accel), 5 (Decel). To modify the ramp slope it is always necessary to enter two (2) data values (from 0 to 255), c orr ...
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AMS DCB-274 - page 49
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 43 128 k 400 0 Set new trip at 400 and turn ports off. 133 k 600 16 Set new trip at 600 an d turn port 5 on. 138 i 200 8 Reset origin, RAM=128, port 4 on. 143 P 0 End program. S Save the shadow RAM program. G 0 Execute program. Failure to store the program in shadow memory will result in loss of all ...
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AMS DCB-274 - page 50
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 44 Function Type NV Bytes Loop on Port Program 3 Command L Mnemonic (Name) L (a, c) Data 1 0 - 2048 Data 2 Condition (0 - 9) Result None L (Loop on Port) Loop on Port will test the specified input port for the requi red condition (c). If the port is NOT at the required level then the program will jum ...
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AMS DCB-274 - page 51
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 45 Two or more flags can be specified for multiple options, i.e., flag 1 + flag 8= 9. So, command “ l 9” will invert limits and set PLC mode. When reading flag s, the host software must convert decimal to binary to evaluate the results. Option table Flag Bit Function Note 1 0 Invert limits Both i ...
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AMS DCB-274 - page 52
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 46 Port 4 Input (Flag 16) This flag informs the controller that Port 4 is to be used as an input. Jumpers JP1 and JP2 must be set accordingly. The commands; read inputs (A129), branch (G 2048) and loop (L n) will use this input port. Conflicts - Flag 2 and Flag 4 ( outputs) are not permitted. Example ...
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AMS DCB-274 - page 53
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 47 Function Type NV Bytes Set Origin Immediate, Program 4 Command O Mnemonic (Name) O Data 1 Position (±8,388,607) Data 2 None Result None O (Set Origin) This command sets the internal 24 - bit position counter to the specified value. Zero position for the RELATIVE mode is “0000.” Signed numbers ...
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AMS DCB-274 - page 54
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 48 Function Type NV Bytes List Program Immediate N/A Command Q Mnemonic (Name) Q (a) Data 1 Address (0 - 2047) Data 2 None Result Listing Q (List Program) ( Note: Use in dumb terminal, single line mode). List program stored in non - volatile memory using the format: Address Instruction Value 1 Value ...
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AMS DCB-274 - page 55
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 49 Function Type NV Bytes Save Parameters to NV Memory Immediate 1 Command S Mnemonic (Name) S Data 1 None Data 2 None Result None S (Save) The following parameters are saved in the NV mem ory and will be recalled as defaults during power - on reset: 1. NV memory addresses 128 through 191 (shadow RAM ...
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AMS DCB-274 - page 56
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 50 2. Write program to location 100. P100 Enter program mode at address 100. 100 A129 Read port states . 102 A0 Turn port 4 off. 104 P0 Exit program mode. 3. Set Trip Point. In “dumb terminal” mode enter T1000 100. This tells the controller to run the program located at address 100 when the step ...
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AMS DCB-274 - page 57
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 51 Function Type NV Bytes Wait (n) Milliseconds Immediate, Program 3 Command W Mnemonic (Name) W (n) Data 1 10 ms. (0 - 65,535) Data 2 None Result None W (Wait) The co ntroller will remain in an idle state for the specified time. The Wait command, if issued while indexing (as a result of an R, +, - , ...
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AMS DCB-274 - page 58
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 52 The controller will remain in an idle state for the specified time. The Wait command, if issued while indexing (as a result of an R, +, - , or F command), timing will NOT start until the motion has completed. NV default =0 The following example program pre - energizes the controller to the run cur ...
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AMS DCB-274 - page 59
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 53 The following procedure is used to access the independently programmable "Hold" and "Run" current feature: 1. Issue the "Y" command to program the desired current values. Ent ering Y10 80 yields a 10% Hold current and 80% Run current. 2. Issue an "S" (Save) ...
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AMS DCB-274 - page 60
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 54 Function Type NV Bytes Read NV Memory Immediate N/A Command [ Mnemonic (Name) [ Data 1 Address (0 - 2047) Data 2 Sequential Bytes (0 - 255) Result Displayed Values [(Read NV Memory) The user may display any byte of the 2047 byte exter nal NV memory. The address specifies the desired location to ac ...
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AMS DCB-274 - page 61
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 55 Function Type NV Bytes Index in Plus Direction Immediate, Program 4 Command + Mnemonic (Name) + (n) Data 1 Steps (0 - 16,777,215) Data 2 None Result None + (Index in Plus Direction) Step in the positive direction for the specified step count. The motor will ramp up, slew, and then ramp down per th ...
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AMS DCB-274 - page 62
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 56 Function Type NV Bytes Read Moving Status Immediate, Program 1 Command ^ Mnemonic (Name) ^ Data 1 None Data 2 None Result Status ^ (Read Moving Status) The host may use this command to deter mine the current moving status that exists within the SMC - 27X2. A non - zero value indicates moving. This ...
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AMS DCB-274 - page 63
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 57 Function Type NV Bytes Terminate Program Immediate 2 Command Mnemonic (Name) Data 1 Data 2 Result Status Byte | (Selective Terminati on) This command (pipend: vertical dash key - Shift ) can be placed at a point to terminate (equivalent to ABORT) the program that was started via the "G" ...
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AMS DCB-274 - page 64
ADVANCED MICRO SYSTEMS, INC. SMC - 27X2 SOFTWARE 58 Function Type NV Bytes Rest art in Party Line Mode None N/A Command ^P Mnemonic ^P Data 1 None Data 2 None Result None ^P (Party Line Mode) Response to the single character “Ctrl P” (16 decimal, 10 hex) is immediate. This control character restarts the controller in party line mode. O ne, or u ...
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AMS DCB-274 - page 65
ADVANCED MICRO SYSTEMS, INC. ADDENDUM 59 Command Summary MNEMONIC / COMMAND DATA 1 RANGE 1 DATA 2 RANGE 2 NV D I P + INDEX IN "+" DIRECTION STEPS 1 - 16,777,215 4 ¤ ¤ - INDEX IN " - " DIRECTION STEPS 1 - 16,777,215 4 ¤ ¤ ESC ABORT/TERMINATE ¤ @ SOFT STOP 2 ¤ ¤ ^C SOFTWARE RESET [ READ NV MEMORY ADDRESS 0 - 2047* NUMBER 0 ...
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AMS DCB-274 - page 66
ADVANCED MICRO SY STEMS, INC. ADDENDUM 60 ASCII Character Code Ctrl Char Dec Hex Code Dec Hex Char Dec Hex Char Dec Hex Char ^@ 00 00 NUL 32 20 64 40 @ 96 60 ` ^A ? 01 01 SOH 33 21 ! 65 41 A 97 61 a ^B ? 02 02 STX 34 22 “ 66 42 B 98 62 b ^C ? 03 03 ETX 35 23 # 67 43 C 99 63 c ^D ? 04 04 EOT 36 24 $ 68 44 D 100 64 d ^E ? 05 05 ENQ 37 25 % 69 45 E ...
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AMS DCB-274 - page 67
ADVANCED MICRO SYSTEMS, INC. ADDENDUM 61 About Step Motor Current There is much confusion regarding the operation of step motors. Depending on your application, the step motor offers several advantages over servo motor designs, including lower cost and simplicity. The step (or stepper, or steppin g) motor is a digital “synchronous” motor with a ...
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AMS DCB-274 - page 68
ADVANCED MICRO SY STEMS, INC. ADDENDUM 62 A current sense circuit is used to switch off the current when it reaches the set value; hence t he motor power is regulated. These “chopper“ circuits operate at speeds above 20khz, well above hearing limits. The following is an abstract from “Control of Stepping Motors, a Tutorial” (linked from www ...
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AMS DCB-274 - page 69
ADVANCED MICRO SYSTEMS, INC. ADDENDUM 63 AMPS and Wire Count and Power The rated current is specified based on the rated power input (watts) of a given motor. A. Basic 8 Wire Motor While never actually used as 8 individual coils, virtually all permanent ma gnet motors have 4 internal coils. All common configurations can be constructed from the 8 - ...
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AMS DCB-274 - page 70
ADVANCED MICRO SY STEMS, INC. ADDENDUM 64 C: Adapting Available 6 Wire Motors A 6 - wire motor is equivalent to the 4 - wire series motor. In practice the two coil ends are connected, while no connection is made to the center tap. Half Cop per or 50% Winding The maximum speed can be increased by using ½ the coil. To do this, connect the driver bet ...
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AMS DCB-274 - page 71
ADVANCED MICRO SYSTEMS, INC. ADDENDUM 65 Application Notes V1.10 Double Speed Characteristics The X2 speed (Version 1.10) introduces several new characteristics: 1. Step rates in excess of 36K steps per second. 2. Faster command execution. 3. Intelligent current decay control. 4. Redirect ports 4 and 5 to Step and Direction outputs (mode command). ...
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AMS DCB-274 - page 72
ADVANCED MICRO SY STEMS, INC. ADDENDUM 66 Serial Adapter Summary AMS offers several serial adapters. Th ese are used to connect a standard computer RS - 232 “D” connector to the serial I/O on AMS controllers (axis). Four, model SIN - “n” adapters are currently available, as follows. SIN - 7, SIN - 9 (not recommended for multi - axis applica ...
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