Frequency to voltage for pathpilot spindle control

config in HAL file , step scale from 1 to 0.25

I wonder what type of circuit they are using on the lathe door and limit switches?

# used to decode the signal from the lathe control board that encodes
# the door and limit switches as a frequency

I use PC817 for input

This is pcb layout file

Contract_Pilot wrote:

I wonder what type of circuit they are using on the lathe door and limit switches?

# used to decode the signal from the lathe control board that encodes
# the door and limit switches as a frequency

i think we need MCU, arduino can cover that prolem

They use a MCU on board. I believe it was a atmel which would infer arduino and if so it's a simple thing to read the inputs and generate a tone (arduino libraries for that are built in) given the separation in the tones it's pretty easy to do actually.

But even with a PIC this is easy to do IMHO

smgvbest wrote:

They use a MCU on board. I believe it was a atmel which would infer arduino and if so it's a simple thing to read the inputs and generate a tone (arduino libraries for that are built in) given the separation in the tones it's pretty easy to do actually.

But even with a PIC this is easy to do IMHO

hi smgvbest
did you check frequency, i thik we can do it with arduino

Why would you do that? Unless you are using a Tormach breakout board, its easier to just use PWM for the VFD
and get additional inputs from another port

PCW wrote:

Why would you do that? Unless you are using a Tormach breakout board, its easier to just use PWM for the VFD
and get additional inputs from another port

i was make new bit file, changle step to pwm for spindle, but i have prolem with hal file, can you help me check it?

########################################################################
# Spindle speed control
#
# stepgen outputs the frequency it is told by tormachspindle comp
#

# type 1 velocity control mode
#setp hm2_5i25.0.stepgen.04.control-type 1

# step/dir
# type 2 quadrature output for 50% duty cycle
#setp hm2_5i25.0.stepgen.04.step_type 2

# no scaling 1:1
#setp hm2_5i25.0.stepgen.04.position-scale 0.5

# handle spindle at speed via separate component
#setp hm2_5i25.0.stepgen.04.maxaccel 0

# stepspace in nanoseconds
#setp hm2_5i25.0.stepgen.04.stepspace 0

# steplen in nanoseconds (10 microseconds)
#setp hm2_5i25.0.stepgen.04.steplen 10000

# assume standard spindle until UI sets it
setp tormachspindle.spindle-type 0

# hispeed spindle min/max
setp tormachspindle.hispeed-min 6000
setp tormachspindle.hispeed-max 24000

# allow UI to access min/max for high speed spindle
# do not net these until the UI code is changed to set them explicitly
# or the setp command above will not stick and they will be set to 0
net spindle-hispeed-min tormachspindle.hispeed-min
net spindle-hispeed-max tormachspindle.hispeed-max

# these let the UI read the min/max maintained by the comp based on spindle type
net spindle-min-speed tormachspindle.min-speed
net spindle-max-speed tormachspindle.max-speed

# the UI sets the spindle type
net spindle-type tormachspindle.spindle-type

# assume high range until UI sets it
setp tormachspindle.belt-position 1
net spindle-range tormachspindle.belt-position
net spindle-range-alarm tormachspindle.speed-alarm

setp tormachspindle.lowbelt-min-rpm [SPINDLE]LO_RANGE_MIN
setp tormachspindle.lowbelt-max-rpm [SPINDLE]LO_RANGE_MAX

setp tormachspindle.highbelt-min-rpm [SPINDLE]HI_RANGE_MIN
setp tormachspindle.highbelt-max-rpm [SPINDLE]HI_RANGE_MAX

# frequencies sent to stepgen to achieve low belt speeds
# 500 Hz -> 6 Hz at VFD -> 175 RPM at spindle (770)
# 10900 Hz -> 120 Hz at VFD -> 3250 RPM at spindle (770)
# 500 Hz -> 6 Hz at VFD -> 100 RPM at spindle (1100-2-3)
# 10900 Hz -> 120 Hz at VFD -> 2000 RPM at spindle (1100-2-3)
# 1600 Hz -> 300 RPM at spindle (1100-1)
# 10900 Hz -> 1750 RPM at spindle (1100-1)
setp tormachspindle.lowbelt-min-mcb-freq [SPINDLE]MIN_MCB_FREQUENCY
setp tormachspindle.lowbelt-max-mcb-freq [SPINDLE]MAX_MCB_FREQUENCY

# frequencies sent to stepgen to achieve high belt speeds
# 500 Hz -> 6 Hz at VFD -> 525 RPM at spindle (770)
# 10900 Hz -> 120 Hz at VFD -> 10200 RPM at spindle (770)
# 500 Hz -> 6 Hz at VFD -> 250 RPM at spindle (1100-2-3)
# 10900 Hz -> 120 Hz at VFD -> 5140 RPM at spindle (1100-2-3)
# 1600 Hz -> 800 RPM at spindle (1100-1)
# 10900 Hz -> 4500 RPM at spindle (1100-1)
setp tormachspindle.highbelt-min-mcb-freq [SPINDLE]MIN_MCB_FREQUENCY
setp tormachspindle.highbelt-max-mcb-freq [SPINDLE]MAX_MCB_FREQUENCY

# speed-out is displayed by UI when program running
net spindle-speed-fb-rpm tormachspindle.speed-out

# connect motion speed-out to input of spindle comp
net spindle-speed-raw motion.spindle-speed-out tormachspindle.speed-in

# connect output of spindle comp to stepgen
#net spindle-speed tormachspindle.mcb-freq-out hm2_5i25.0.stepgen.04.velocity-cmd


setp hm2_5i25.0.pwmgen.01.output-type 1
setp hm2_5i25.0.pwmgen.01.pwm_frequency 24000
setp hm2_5i25.0.pwmgen.01.scale 100
net spindle-speed tormachspindle.mcb-freq-out hm2_5i25.0.pwmgen.01.value

# spindle at speed parameters for tormachspindle component
setp tormachspindle.startup-delay [SPINDLE]STARTUP_DELAY

# time to reach max speed from stopped
setp tormachspindle.seconds-to-max-rpm [SPINDLE]SECONDS_TO_MAX_RPM

# connect spindle comp at-speed output to motion
net spindle-at-speed tormachspindle.at-speed motion.spindle-at-speed

# connect motion spindle enable to stepgen enable and spindle comp
#net spindle-on motion.spindle-on hm2_5i25.0.stepgen.04.enable tormachspindle.spindle-on
net spindle-on motion.spindle-on hm2_5i25.0.pwmgen.01.enable tormachspindle.spindle-on

You are using the second PWM generator, is that deliberate?