Hictop 3DP-12 starts print in midair

Hi all, I've spent about 3 very interesting hours browsing the boards hoping for an answer to my problem.
I have just upgraded to Marlin 1.1.4, put all my machine's peculiarities in the right places - I thought - went to the printer, auto-homed OK, great let's test print a Benchy.
Press the print button, printer heats up OK, does it's little homing dance and starts to print about 3 centimeters above the bed. Of course I go straight to the config.h file, that looks OK, next option 3dprintboard.
There seem to be one or two people who have had a similar problem over the years, but there hasn't been much in the way of help posted so either they threw their printer out of the window or they solved it and didn't tell anyone.
Anyway I'm hoping someone who has solved this problem or has some idea why it happens can help me. I can post a copy of my config.h and any other info wanted, if necessary.
By the way, for anyone starting down the Marlin Firmware upgrade route, I can thoroughly recommend the marlin-conf editor ( https://www.thingiverse.com/thing:2403436), it makes things much easier to see and understand.
Hictop 3DP-12 (Prusa i3 clone); Marlin 1.1.4;

I have 2 Hictops Aluminum 3D Printers and have tried to compile Marlin 1.1.4 without any success.

I have been running Marlin-1.1.0-RC8BF-HICi3 on both of my Hictop 3D Printers.

You can download it here maybe something in the code will help you to get yours to work.

I would like a help if I had a version of Marlin 1.1.4 that will compile without errors and your Configuration.h file two minds are better than one they say.

Thanks for the quick reply, you're right two heads are better than one. That being so I have downloaded the RC8BF-HICi3 file and I am just printing out the config.h file to make it easier to read. I have also uploaded my 1.1.4 config.h file to Google Drive, this is the link - https://drive.google.com/drive/folde...28?usp=sharing . I have put it in .txt format, but I'm using Linux Mint so I'm not sure if you can open it successfully. If you have trouble my email is dave.far.lavorare@gmail.com email me and I can send it as an attachment.

By the way, did you look at the Marlin configurator I linked to in my post, you open it in an empty folder and it downloads the latest Marlin open for you to edit, then compiles and flashes your printer. It's what I used to edit my config.h, see what you think.

Quote:

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Originally Posted by 3Dave

By the way, did you look at the Marlin configurator I linked to in my post, you open it in an empty folder and it downloads the latest Marlin open for you to edit, then compiles and flashes your printer. It's what I used to edit my config.h, see what you think.

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I have never seen the marlin-conf editor. I have looked for but have, only found this Prusa Calculator. I will be sure to give it a try.

Yes I've seen that, I found configurator on Thingyverse. Anything which makes configuring a printer easier has got to be worth a look, eh!

If this is a Hictop 3DP12 this line should be

#define DEFAULT_AXIS_STEPS_PER_UNIT { 80, 80, 2560, 94.4962144}

I think I've found the root of my problem, I sent M501 to the printer. The settings I got back don't seem to have any relation to my config.h but the interesting thing is the last two lines:- 18:15:23.659 : echo:Z-Probe Offset (mm):
18:15:23.660 : echo: M851 Z3.90. And there's my Z discrepancy. Now I just have to figure how to clear the printer and re-flash my config.h ( after I've re-edited it of course!).

So you want to do

// M500 - stores parameters in EEPROM
// M501 - reads parameters from EEPROM (if you need reset them after you changed them temporarily).
// M502 - reverts to the default "factory settings". You still need to store them in EEPROM afterwards if you want to.
//define this to enable EEPROM support
#define EEPROM_SETTINGS

You will need to enable the Above line in you firmware

Finally found it here you can also take a look maybe more information not in the other one.


Marlin-1.1.0-RC6 Hic

This gives Three Hictop compatible Marlins that compile With out errors on Auduino 1.8.3

Hello 3Dave

Post Printer Image Here, Let's get this 3D Printer Working for you.

Quote:

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Originally Posted by 3Dave

I think I've found the root of my problem, I sent M501 to the printer. The settings I got back don't seem to have any relation to my config.h but the interesting thing is the last two lines:- 18:15:23.659 : echo:Z-Probe Offset (mm):
18:15:23.660 : echo: M851 Z3.90. And there's my Z discrepancy. Now I just have to figure how to clear the printer and re-flash my config.h ( after I've re-edited it of course!).

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I Bought Every episode thru 6 Have only watch about Half so Far.

OK lets take a look at your numbers
18:15:23.553 : N17 M501*17
18:15:23.610 : echo:V39 stored settings retrieved (465 bytes; crc 6649)
18:15:23.610 : echo: G21 ; Units in mm
18:15:23.610 : echo: M149 C ; Units in Celsius
18:15:23.610 : echo:Filament settings: Disabled
18:15:23.611 : echo: M200 D3.00
18:15:23.611 : echo: M200 D0
18:15:23.611 : echo:Steps per unit:
18:15:23.615 : echo: M92 X80.00 Y80.00 Z2560.00 E94.50
18:15:23.615 : echo:Maximum feedrates (units/s):
18:15:23.615 : echo: M203 X200.00 Y200.00 Z3.00 E25.00
18:15:23.615 : echo:Maximum Acceleration (units/s2):
18:15:23.615 : echo: M201 X1200 Y1200 Z100 E10000
18:15:23.616 : echo:Acceleration (units/s2): P<print_accel> R<retract_accel> T<travel_accel>
18:15:23.616 : echo: M204 P1200.00 R3000.00 T1200.00
18:15:23.658 : echo:Advanced: S<min_feedrate> T<min_travel_feedrate> B<min_segment_time_ms> X<max_xy_jerk> Z<max_z_jerk> E<max_e_jerk>
18:15:23.658 : echo: M205 S0.00 T0.00 B20000 X10.00 Y10.00 Z0.40 E5.00
18:15:23.658 : echo:Home offset:
18:15:23.658 : echo: M206 X0.00 Y0.00 Z0.00
18:15:23.659 : echo:Material heatup parameters:
18:15:23.659 : echo: M145 S0 H210 B60 F0
18:15:23.659 : M145 S1 H240 B110 F0
18:15:23.659 : echo:PID settings:
18:15:23.659 : echo: M301 P17.22 I0.92 D80.43
18:15:23.659 : echo:Z-Probe Offset (mm):
18:15:23.660 : echo: M851 Z3.90


I see that the


// Typical stepper motors have 200 steps per full step/rev = 1.8°/step, so 1/16 microstepping = STEPS_PER_REVOLUTION_E = 3200
// X-Y Axis 3200, / 20 tooth, / 2mm pitch = 200*16 / 20 / 2 = 80 :: (STEPS_PER_REVOLUTION_X / IDLER_TEETH_X / BELT_PITCH_X)
// Z Axis 3200, / 1.25mm pitch leadscrew = 200*16 /1.25 = 2560 :: (STEPS_PER_REVOLUTION_Z / PITCH_OF_Z_ROD)
// Z Axis 3200, / 2mm pitch leadscrew = 200*16 /2 = 1600 :: (STEPS_PER_REVOLUTION_Z / PITCH_OF_Z_ROD)
// Z Axis 3200, / 8mm pitch leadscrew = 200*16 /8 = 400:: (STEPS_PER_REVOLUTION_Z / PITCH_OF_Z_ROD)
// E-Axia 3200, / (11mm Gear OD * pi) :: (STEPS_PER_REVOLUTION_E * EXTRUDER_GEAR_RATIO / (PINCH_WHEEL_DIAMETER * PI))

//#define DEFAULT_Kp 17.22
//#define DEFAULT_Ki 0.92
//#define DEFAULT_Kd 80.43


#define DEFAULT_AXIS_STEPS_PER_UNIT { 80, 80, 2560, 94.4962144 }
#define DEFAULT_MAX_FEEDRATE { 200, 200, 3, 25 }
#define DEFAULT_MAX_ACCELERATION { 1200, 1200, 100, 10000 }
#define DEFAULT_ACCELERATION 1200// X, Y, Z and E acceleration for printing moves
#define DEFAULT_RETRACT_ACCELERATION 3000 // E acceleration for retracts
#define DEFAULT_TRAVEL_ACCELERATION 1200 // X, Y, Z acceleration for travel (non printing) moves
#define DEFAULT_XJERK 10.0
#define DEFAULT_YJERK 10.0
#define DEFAULT_ZJERK 0.4
#define DEFAULT_EJERK 5.0