X/Y Axis Speed & Bed Temperature Issue

I am on the latest version (1.1.9). I am having the strangest issue with my ANET A8. If I reboot my printer the x & y motors move as expected. I start having issues if I issue a bed temp setting for 85C. Initially after I issue the command all is still good. However, once the temperature starts to go above ~70-75C the x/y motors pick up speed dramatically. By the time it hits 85C, the x/y motors are moving ~10 times faster than requested. The strangest part is after I turn off the bed heater and let the bed cool, the motors still run 10 times faster. If I restart by unplugging the unit all goes back to normal.
The commands that I am issuing are as follows

M140 S85
G1 X0 Y0 F300
G1 X150 F300 -> 30 seconds to move 150 mm works initially
G1 X0 F300 -> ~3 seconds at 85C.
G1 X150 F300 -> ~3 seconds at 85C.

I am not sure what the issue is. Any suggestions? And idea what the real issue is firmware? Hardware? Any ideas on how to isolate what the issue is?


FYI, I can print PLA just fine when setting the bed temperature to 60. Trying to get the bed temp hotter for PETG due to print coming off the bed while printing.

Edited 1 time(s). Last edit at 02/12/2019 06:24AM by cglass17.

I would say that you need to Factory reset your Firmware Defaults

You do this By sending these G-Code Commands


You can do an Initial "M503 - Report Settings" copy and paste to compare with the final "M503 - Report Settings"

M502 - Factory Reset
M500 - Save Settings

M503 - Report Settings

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Computer Programmer / Electronics Technician

I will give that a shot and report back. I should have stated that I was on 1.1.8. I upgraded to 1.1.9 to see if it would correct my issue. The only thing I changed was on 1.1.9 was the min x / y position.

When I did that the M503 reported the same thing before and after the reset. Here is what it reported

Send: M503
Recv: echo: G21 ; (mm)
Recv: echo: M149 C ; Units in Celsius
Recv:
Recv: echo:Filament settings: Disabled
Recv: echo: M200 D1.75
Recv: echo: M200 D0
Recv: echoteps per unit:
Recv: echo: M92 X100.00 Y100.00 Z400.00 E100.00
Recv: echo:Maximum feedrates (units/s):
Recv: echo: M203 X400.00 Y400.00 Z8.00 E50.00
Recv: echo:Maximum Acceleration (units/s2):
Recv: echo: M201 X2000 Y2000 Z100 E10000
Recv: echo:Acceleration (units/s2): P R T
Recv: echo: M204 P400.00 R1000.00 T1000.00
Recv: echo:Advanced: Q S T X Y Z E
Recv: echo: M205 Q20000 S0.00 T0.00 X10.00 Y10.00 Z0.30 E5.00
Recv: echo:Home offset:
Recv: echo: M206 X0.00 Y0.00 Z0.00
Recv: echo:Material heatup parameters:
Recv: echo: M145 S0 H190 B60 F0
Recv: echo: M145 S1 H240 B90 F0
Recv: echoID settings:
Recv: echo: M301 P21.00 I1.25 D86.00
Recv: ok

I will still try the test to see if it had an impact. Just reporting what I saw.