M303 H0 S60 with SSR

peter247

Hi , doing a bit of heat bed tuning with M303 H0 S60 , but what I want to know is should I be using because it is going through a mains 220v SSR .

This is my config.g using for the heater.

M308 S0 A"BED" P"Temp_0" Y"thermistor" T100000 B3950 C0; configure sensor 0 as thermistor on pin bedtemp type 3950
M950 H0 C"Out_0" T0                            ; create bed heater output on bedheat and map it to sensor 0
M307 H0 B1 S1.00                               ; enable bang-bang mode for the bed heater and set PWM limit
M140 H0                                        ; map heated bed to heater 0
M143 H0 S150

jay_s_uk

@peter247 set the frequency to Q10 in M950.
And what board are you using?
I think it should be Out0 not Out_0

peter247

@jay_s_uk it is a duet 3 mini 5+ , "I think it should be Out0 not Out_0"
it works, so I think Out_0 should be right .

jay_s_uk

@peter247 must have some pin name filtering in the firmware then
https://duet3d.dozuki.com/Wiki/RepRapFirmware_3_overview#Section_Duet_3_Mini_5_pin_names

peter247

@jay_s_uk Strange !!!! , I have Out_0 to Out_5 in use for the fans and heaters etc .
I copied the pin name from the doc at the time ? and they are all working .

The tuning as been on for nearly 1 hour , so I'll wait until the hour is up and stop it and try with Q10 set and try again.

jay_s_uk

@peter247 it'll probably still take an hour. The Q10 just protects the SSR.
If you have a bed that takes a long time to cool down, you could try a lower Y value, such as 3, as long as you're running 3.3.0

peter247

@jay_s_uk well it did it, in the end !!!

Auto tuning heater 0 completed after 5 idle and 15 tuning cycles in 3147 seconds. This heater needs the following M307 command:
M307 H0 B0 R0.734 C515.8 D11.02 S1.00 V24.1
Edit the M307 H0 command in config.g to match this. Omit the V parameter if the heater is not powered from VIN.