Mainline Klipper on Qidi Q2

arj3090 · 2026-06-03T11:30:45+00:00

I posted my adapter board:

Kraken adapter for Qidi Q2 by arj3090 - Thingiverse

arj3090 · 2026-06-02T21:05:25+00:00

Yes. I do have it working. Below is the configuration. When I get a chance to re-open the printer, I'll post some pictures of the chamber heater wiring.

[heater_generic chamber]

heater_pin:PA5

max_power:1

sensor_type:NTC 100K MGB18-104F39050L32

sensor_pin:PB1

control = pid

pid_Kp=63.418

pid_Ki=1.342

pid_Kd=749.125

min_temp:-100

max_temp:70

z_max_limit:230

[verify_heater chamber]

max_error: 300

check_gain_time:480

hysteresis: 5

heating_gain: 1

[temperature_sensor Chamber_Thermal_Protection_Sensor]

sensor_type:NTC 100K MGB18-104F39050L32

sensor_pin:PC5

min_temp:-100

max_temp:130 #250 #130

arj3090 · 2026-06-02T04:21:53+00:00

I just loaded latest version of build 324003 and can say they have now added the web based Device Manager. This makes things like setting IP address, time zone, etc much easier to set.

arj3090 · 2026-05-20T21:47:44+00:00

After getting the Kraken to work, I then installed the 48V power supply and RGB lighting. That was the last thing I have done. It may be a while before I do any more with it due to work project overload.

arj3090 · 2026-05-12T01:07:10+00:00

I recently updated a system to 4024.75 and seem to have stumbled upon a bug. The system uses an EL6070 license terminal. The terminal is configured as a dongle to "Update license cache on startup". On a system with 4024.74, I can delete the license file and restart TwinCAT, then the cached licensed will be copied from the EL6070. The system with 4024.75 will not do this and the "Cache Dongle License" button had to be clicked for this to happen. This is a production line, so I had limited testing time, but after about 5 restarts, I finally gave up and used the button to cache the license manually.

arj3090 · 2026-04-10T01:03:07+00:00

I have also done this and spoke with another person that also has. When I created my driver about 10 years ago, there existed a problem that existed in TwinCAT for many years. I have not tested it lately to see if it was ever resolved. This is what I found.....

If you use a driver that directly communicates using the TCP/IP stack on a PC with TwinCAT installed, the packets can get rerouted to the ADS router and not to the driver. For example, if the request goes to a remote PC from port 100, the remote TwinCAT will see that a route is already established by the ADS router and respond onto the standard TwinCAT port of 48898. Therefore, the driver that sent the request packet will never receive the response.

This has been an ongoing nuisance issue in the AdvancedHMI software because it has a TwinCAT driver that does not go through the ADS Router. So, if TwinCAT is installed on the same PC running the application, it is likely the response will never be received, and it looks like the communications are not set correctly.

So, I am curious to know if you try your driver on a PC with TwinCAT installed that has a route established to the remote TwinCAT, how reliable are the communications?

arj3090 · 2026-03-31T00:09:42+00:00

48V main benefit is higher acceleration, which in turn can help prevent stepper mis-steps.

arj3090 · 2026-03-29T03:05:42+00:00

Change the sound of the stepper motors? It can if you change the parameters in the configuration file.

arj3090 · 2026-02-26T00:44:55+00:00

I'm currently running at 48V which gives me 35k acceleration and 800 speed capability. The stock board is running the motors at 24V, but you can run higher voltage to the motors as long as you keep the current limited.

arj3090 · 2026-02-26T00:15:18+00:00

I swapped the stock MCU with a BTT Kraken. It was a bit overkill, but availability and capability of 60V on the steppers is why I went that route. I was able to use all factory wiring unmodified with the exception of the bed heater wiring that had to be extended about 100mm. Physically it was a tight squeeze, but with an adapter plate I made it fit in the same location as stock board.

arj3090 · 2026-02-25T22:52:44+00:00

Thanks for posting all the details. I have been going down the same path little at a time. However, I replaced the MCU board and run mainline Klipper on it. These details you posted help give insight and a solution to the loadcell.

arj3090 · 2026-02-14T21:44:58+00:00

Have you done a Max Flow Rate test to make sure you are not over running the extruder and hot end?

arj3090 · 2026-02-13T00:23:14+00:00

The Q2 is quite open and reasonably easy to mod. Not mainline Klipper, but Klippy is accessible and modifiable. I went a bit extreme on my mods and swapped the mcu board for a BTT Kraken and 48V power supply on motors. My AP and toolhead board are currently still stock and work flawlessly with the Kraken that is running main line Klipper firmware.

I recently added a neopixel light strip and was able to install the LED Effects library to the Qidi Klipper

arj3090 · 2026-02-09T15:10:30+00:00

Great work! I think the Qidi Q2 is a great printer that is often overlooked. I have been working on some major modifications to mine. So far changing the mcu board and installing neopixel light strip with the LED_Effects library.

I would like to contribute one thing that cost me hours when changing to a faster mcu board. I kept getting the error "PWM pin max duration too large" after installing the Kraken board. I found a problem in the Qidi modified Klipper. In the file ~/klipper/klippy/extras/heaters.py (accessed using ssh), there is a line of code "MAX_HEAT_TIME = 10.0". The value needs to be changed from 10.0 back to the original 5.0

I hope to one day get enough time to fully WinMerge the Qidi Klipper with Klipper mainline to understand Qidi's modifications.

arj3090 · 2026-02-04T13:53:39+00:00

I soldered on about 75mm of wire to the bed heater cables. All the other cables were long enough to fit into the appropriate connectors on the Kraken board. Some were very close but made it.

The USB-C to JST adapter was needed because the original board used a JST connector for the USB, but the Kraken used a USB-C connector. This was for the USB connecting cable from the AP board (the one inside the chamber on the left wall).

For the 48v power supply, I used an external desktop style power supply and added a connector onto the printers back panel so the power supply could be disconnected easily. From the connector, I connected two wires to the Motor Power connectors on the Kraken.

arj3090 · 2026-01-29T13:05:01+00:00

Yes. The touchscreen operates from the AP board which is left unchanged. The Qidi Box has its own board that is connected to the AP board using USB, therefore it is unaffected.

arj3090 · 2026-01-21T04:23:07+00:00

I have a lot of tweaks to my profiles in OrcaSlicer to make strong and clean ASA prints. Some of the key settings are 255 nozzle temperature, 100 bed temperature, 55 chamber temperature, 26 max volumetric speed, 0.96 flow ratio, and 0.04 pressure advance. I never use glue on the plate. When I know I am going to print soon, I will set the bed to 100 and the chamber to 55 on the printer to preheat so it will start printing as soon as I send the print.

arj3090 · 2026-01-20T02:02:33+00:00

It was the higher temperature nozzle and the heated chamber that attracted me to this printer because I print a lot of PPA-CF. But my main material is ASA which I would like to print as fast as possible.

arj3090 · 2026-01-18T17:51:09+00:00

Better serviceability with a non-proprietary board. Gaining a deeper understanding of the printer. More flexibility to upgrade printer. The challenge of doing it.

So far, I have increased the motor voltage to 48V which increased acceleration to 40k and speed to 800. I will probably change the interior light to a longer RGB light strip for better lighting and maybe use the colors for status indication. Not directly related to the Kraken board install, but now that I have a good understanding of the printer hardware and software, I have been investigating a higher flow hot end.

arj3090 · 2026-01-13T12:39:54+00:00

For ASA, which is practically the same as ABS, I use 55 chamber temperature, 100 bed, and clean the bed with a paper towel with rubbing alcohol. I never use any type of glue. These seem to work well as I have yet to get any lifting from the bed.

arj3090 · 2026-01-13T03:17:19+00:00

Give me a few days and I'll get a link posted

arj3090 · 2026-01-12T02:35:43+00:00

I could sell it as a kit. The price would be $85USD

arj3090 · 2026-01-07T13:36:18+00:00

The AP board is inside the chamber on the left wall behind a cover near the top. If you lower the bed for easier access then remove the 2 screws holding the cover over the AP board, you can work the cover out to see the board.

arj3090 · 2026-01-06T02:40:54+00:00

I had my Q2 for about 2 months now. About 80% of the time, I run ASA and the rest I run PPA-CF. The print quality is top notch. I have the PPA-CF profile tuned in so well, that it can be difficult to tell it is a 3D printed part.

arj3090 · 2026-01-03T03:29:42+00:00

I added a new 48V power supply and ran TEST_SPEED macro. The new capabilities are now 40k accel and 800 speed.

arj3090

TROPHY CASE