Too little stepper current during heating
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Hello,
I own a Duet 2 Wifi in an XY Core. I have noticed that the Z-axis does not get enough power while heating up.
According to the homing script the bed lowers a few mm and then goes up to the endstop. If I heat up while homing, the motor will rattle shortly when it tries to raise the bed again. When I stop heating, there is no sound. What is my problem? Ive attached my settings -
The Duet3D is putting the motor to sleep, reducing its current to the fraction specified in the idle current setting. This fraction may be too low for your machine.
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its set to 30%
M906 X900 Y900 Z900 E900 I30but the motor shouldnt sleep becaue it lowers the bed before, so they should be active?
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I also notice, it only happens while homing X or Y. Homing Z and heating doesnt rattle
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Is your power supply too weak?
Can you send an M122 after experiencing the problem and post the results?
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Its a 24V 15A power supply
=== Diagnostics === RepRapFirmware for Duet 2 WiFi/Ethernet version 2.05.1 running on Duet WiFi 1.02 or later Board ID: 08DGM-9T6BU-FG3SJ-6JKD4-3SJ6L-TAYRG Used output buffers: 3 of 24 (11 max) === RTOS === Static ram: 25712 Dynamic ram: 93220 of which 336 recycled Exception stack ram used: 624 Never used ram: 11180 Tasks: NETWORK(ready,900) HEAT(blocked,1232) MAIN(running,3728) IDLE(ready,160) Owned mutexes: === Platform === Last reset 00:11:21 ago, cause: software Last software reset at 2020-04-11 20:33, reason: User, spinning module GCodes, available RAM 11212 bytes (slot 3) Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0441f000 BFAR 0xe000ed38 SP 0xffffffff Task 0x4e49414d Error status: 0 Free file entries: 10 SD card 0 detected, interface speed: 20.0MBytes/sec SD card longest block write time: 9.0ms, max retries 0 MCU temperature: min 32.6, current 33.5, max 33.9 Supply voltage: min 23.6, current 23.8, max 24.1, under voltage events: 0, over voltage events: 0, power good: yes Driver 0: standstill, SG min/max 0/150 Driver 1: standstill, SG min/max 0/297 Driver 2: standstill, SG min/max 0/55 Driver 3: standstill, SG min/max 0/1023 Driver 4: standstill, SG min/max not available Date/time: 2020-04-11 20:44:51 Cache data hit count 1756423033 Slowest loop: 36.76ms; fastest: 0.06ms I2C nak errors 0, send timeouts 0, receive timeouts 0, finishTimeouts 0, resets 0 === Move === Hiccups: 0, FreeDm: 160, MinFreeDm: 124, MaxWait: 101665ms Bed compensation in use: none, comp offset 0.000 === DDARing === Scheduled moves: 15, completed moves: 15, StepErrors: 0, LaErrors: 0, Underruns: 0, 0 === Heat === Bed heaters = 0 -1 -1 -1, chamberHeaters = -1 -1 Heater 0 is on, I-accum = 0.0 Heater 1 is on, I-accum = 0.4 === GCodes === Segments left: 0 Stack records: 2 allocated, 0 in use Movement lock held by null http is idle in state(s) 0 telnet is idle in state(s) 0 file is idle in state(s) 0 serial is idle in state(s) 0 aux is idle in state(s) 0 daemon is idle in state(s) 0 queue is idle in state(s) 0 autopause is idle in state(s) 0 Code queue is empty. === Network === Slowest loop: 15.53ms; fastest: 0.00ms Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0) Telnet(0) HTTP sessions: 1 of 8 - WiFi - Network state is running WiFi module is connected to access point Failed messages: pending 0, notready 0, noresp 0 WiFi firmware version 1.23 WiFi MAC address 4c:11:ae:02:e3:d8 WiFi Vcc 3.34, reset reason Turned on by main processor WiFi flash size 4194304, free heap 25264 WiFi IP address 192.168.178.90 WiFi signal strength -69dBm, reconnections 0, sleep mode modem Socket states: 0 0 0 0 0 0 0 0 -
What is the heated bed?
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To be honest, I don't know. It's a Two Trees Sapphire S Printer
