Spindle pwm pin pw:period has no effect

[xpix]

Hello,

i test for my XATC some boards to get some functions stable. During my test with the PWMSpindle i wonder that the change in pwm_period has no effect on pin 1.23 (PWM capable pin).

Here my configuration:
Build version: edge-75df940, Build date: Jan 18 2017 20:24:49, MCU: LPC1768, System Clock: 100MHz
CNC Build 3 axis

switch.spindle.enable                            true             #
switch.spindle.pwm_period                        100000            # <---- default 1000, sets the PWM frequency
switch.spindle.input_on_command                  M3               #
switch.spindle.input_off_command                 M5               #
switch.spindle.output_pin                        1.23             # Here we are using the first big MOSFET
switch.spindle.output_type                       pwm            # pwm output settable with S parameter in the input_on_comand
switch.spindle.max_pwm                           255              # set max pwm for the pin default is 255

You see pic from my oszi at the command "M3 S100" ... (btw, can we put the max rpm/min in config and calculate the pwm value correct? i.e. "M3 S6000" max 12000rpm/min == 50% on pwm pin)

I changed for my DC Motor Controller the PWM Frequency to 100 kHz but the Frequency never changed. I check the code but find nothing:

https://github.com/Smoothieware/Smoothieware/blob/edge/src/modules/tools/spindle/PWMSpindleControl.cpp#L84

Please help :)

[arthurwolf]

you want to be using hw_pwm for output-type, on a pwm-capable pin, not "pwm". See http://smoothieware.org/switch

…

On Sun, Jan 29, 2017 at 11:29 AM, Frank Herrmann ***@***.***> wrote: Hello, i test for my XATC some boards to get some functions stable. During my test with the PWMSpindle i wonder that the change in pwm_period has no effect on pin 1.23 (PWM capable pin). Here my configuration: Build version: edge-75df940, Build date: Jan 18 2017 20:24:49, MCU: LPC1768, System Clock: 100MHz CNC Build 3 axis switch.spindle.enable true # switch.spindle.pwm_period 100000 # <---- default 1000, sets the PWM frequency switch.spindle.input_on_command M3 # switch.spindle.input_off_command M5 # switch.spindle.output_pin 1.23 # Here we are using the first big MOSFET switch.spindle.output_type pwm # pwm output settable with S parameter in the input_on_comand switch.spindle.max_pwm 255 # set max pwm for the pin default is 255 [image: image] <https://cloud.githubusercontent.com/assets/3763176/22403368/36d87eac-e615-11e6-8c1d-f49aef8227c5.png> You see pic from my oszi at the command "M3 S100" ... (btw, can we put the max rpm/min in config and calculate the pwm value correct? i.e. "M3 S6000" max 12000rpm/min == 50% on pwm pin) I changed for my DC Motor Controller the PWM Frequency to 100 kHz but the Frequency never changed. I check the code but find nothing: https://github.com/Smoothieware/Smoothieware/blob/edge/src/modules/tools/ spindle/PWMSpindleControl.cpp#L84 Please help :) — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#1103>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAGpFflEiWlGGDtcepwZoh1xVWVbl25jks5rXGnugaJpZM4LwwYO> .

-- Courage et bonne humeur.

[xpix]

Thnaks for ur fast answer ok, i change it:

switch.spindle.enable                            true             #
switch.spindle.pwm_period                        100000            # default 1000, sets the PWM frequency
switch.spindle.input_on_command                  M3               #
switch.spindle.input_off_command                 M5               #
switch.spindle.output_pin                        1.23             # Here we are using the first big MOSFET
switch.spindle.output_type                       hwpwm            # pwm output settable with S parameter in the input_on_comand
switch.spindle.max_pwm                           255              # set max pwm for the pin default is 255

Same result at M3 S50 (it's just between 0 and 100), Frequency is about 0.050 kHz

[arthurwolf]

The value you want to set is not pwm_period but pwm_period_ms ( period in milliseconds ), and 10000 is a strange value to set there. Also, next time you file an issue, make sure you strictly follow the rules : https://github.com/Smoothieware/Smoothieware/blob/edge/ISSUE_TEMPLATE.md

…

On Sun, Jan 29, 2017 at 3:27 PM, Frank Herrmann ***@***.***> wrote: Thnaks for ur fast answer ok, i change it: switch.spindle.enable true # switch.spindle.pwm_period 100000 # default 1000, sets the PWM frequency switch.spindle.input_on_command M3 # switch.spindle.input_off_command M5 # switch.spindle.output_pin 1.23 # Here we are using the first big MOSFET switch.spindle.output_type hwpwm # pwm output settable with S parameter in the input_on_comand switch.spindle.max_pwm 255 # set max pwm for the pin default is 255 Same result at M3 S50 (it's just between 0 and 100), Frequency is about 0.050 kHz [image: image] <https://cloud.githubusercontent.com/assets/3763176/22404726/4361a884-e637-11e6-8f23-d4c683da6dcf.png> — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#1103 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAGpFfUOAVnt32ESfpBj1DQ1GXAfSwRuks5rXKHXgaJpZM4LwwYO> .

-- Courage et bonne humeur.

[xpix]

Ok, found the problem. You have another parameter:
switch.spindle.pwm_period_ms = 20 # 50Hz
change it to
switch.spindle.pwm_period_ms = 0.2 # 5 kHz
and it works, many thanks for ur help.