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| slice:qt [2022/07/20 23:16] – external edit 127.0.0.1 | slice:qt [2023/08/11 15:53] (current) – external edit 127.0.0.1 |
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| Click here for the [[https://github.com/Vescent/SLICE-QT-Firmware-Upgrade|Github page for SLICE-QTC firmware revisions]]\\ | Click here for the [[https://github.com/Vescent/SLICE-QT-Firmware-Upgrade|Github page for SLICE-QTC firmware revisions]]\\ |
| Please check back for added functionality. Contact [[[email protected]|sales [at] vescent [dot] com]] for questions and corrections, or to request added functionality. | Please check back for added functionality. Contact [[[email protected]|sales [at] vescent [dot] com]] for questions and corrections, or to request added functionality. |
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| =====Description===== | =====Description===== |
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| The SLICE-QTC is a high-precision temperature controller (see <imgref qt_prod_shot>). It will control up to four thermal plants with sub-millikelvin precision. | The SLICE-QTC is a high-precision temperature controller (see <imgref qt_prod_shot>). It will control up to four thermal plants with sub-millikelvin precision. |
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| <imgcaption qt_prod_shot|The SLICE-QTC>{{ slice:front-angle-acs-large.jpg?200|}}</imgcaption> | <imgcaption qt_prod_shot|The SLICE-QTC>{{ slice-qtc-overshoot-new-logo.png?200|}}</imgcaption> |
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| =====Purchase Includes===== | =====Purchase Includes===== |
| | Channels | 4 | | | Channels | 4 | |
| | Loop Filter | PID, adjustable corners and proportional Gain | | | Loop Filter | PID, adjustable corners and proportional Gain | |
| | Control Range | -10 to +120°C | | | Control Range | -20 to +120°C ((with properly designed plant)) | |
| | Compatible Transducer | TEC or resistive heater | | | Compatible Transducer | TEC or resistive heater | |
| | Compatible Sensor | NTC thermistor ((Nominal value 10 kΩ at room temperature. Precision at temperatures removed from room temperature can be improved by selecting a thermistor whose resistance is ~10 kΩ near the target temperature.)) | | | Compatible Sensor | NTC thermistor ((Nominal value 10 kΩ at room temperature. Precision at temperatures removed from room temperature can be improved by selecting a thermistor whose resistance is ~10 kΩ near the target temperature.)) | |
| | Temperature Stability | ±0.2 mK over 10 min((Plant-dependent; value specified for D2-100 laser)) | | | Temperature Stability | ±0.2 mK over 10 min((Plant-dependent; value specified for D2-100 laser)) | |
| | Precision | ~1 mK | | | Precision | ±0.2 mK | |
| | Control Capacity | 40 W total((User-distributable over four channels)) \\ 20 W max for a single channel | | | Control Capacity | 40 W total((User-distributable over four channels)) \\ 20 W max for a single channel | |
| | Current Capacity | 6 A per channel((Subject to 40 W overall maximum)) | | | Current Capacity | 6 A per channel((Subject to 40 W overall maximum)) | |
| This can be done either from the home screen or the single channel summary menu. Gain, polarity, and setpoint can also be adjusted from the I/O menu by pressing the "gear" icon next to the A or B input where the slow servo is enabled. | This can be done either from the home screen or the single channel summary menu. Gain, polarity, and setpoint can also be adjusted from the I/O menu by pressing the "gear" icon next to the A or B input where the slow servo is enabled. |
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| == Feedforward == | |
| This mode allows a feedforward signal to be summed into the output of the PID loop filter. The feedforward signal current is related to the input voltage Vin by: Feedforward Current [A] = Gain[A/V] x Vin + Offset[A]. Touch the Settings icon to the right of the channel selection to adjust the Gain and Offset. | |
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| <WRAP center round box 60%><tabcaption input |Front-panel input signals> | <WRAP center round box 60%><tabcaption input |Front-panel input signals> |
| === Trigger In === | === Trigger In === |
| The Trigger Input on the back panel of the SLICE-QTC can be used to turn any of the four temperature control channels on or off. The trigger can be configured from the I/O menu, under "Trigger In". Select the "Channels" field and choose which channels you want to be affected by the trigger. Applying 5V to Trigger Input will enable the servo for all selected channels, and applying 0V will disable them. | The Trigger Input on the back panel of the SLICE-QTC can be used to turn any of the four temperature control channels on or off. The trigger can be configured from the I/O menu, under "Trigger In". Select the "Channels" field and choose which channels you want to be affected by the trigger. Applying 5V to Trigger Input will enable the servo for all selected channels, and applying 0V will disable them. |
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| | As of 2 August 2023 with up-to-date firmware, it is possible to invert the SLICE-QTC response to a trigger input. For instance, the SLICE-QTC can be programmed to either turn on or turn off a given channel when the input is trigger goes from low to high or vice versa.touch I/O > Trigger In and <imgref trigger_in> will be displayed. |
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| | <imgcaption trigger_in|Programming the rear-panel trigger out>{{ slice:slice-qtc_input_trigger.png?400x254 |}}</imgcaption> |
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| Auto tune cannot be run for a channel which is under trigger control. Attempting to run an auto tune on a channel with a trigger input enabled will bring up a dialogue: "External input not compatible with auto tune. Turn external input off and continue?". Pressing OK will disable the trigger for that channel and begin the auto tune. Pressing "Cancel" will dismiss the dialogue, leaving the trigger enabled, and the auto tune will cancel. Additionally, a trigger cannot be enabled on a channel with an active auto tune being run. | Auto tune cannot be run for a channel which is under trigger control. Attempting to run an auto tune on a channel with a trigger input enabled will bring up a dialogue: "External input not compatible with auto tune. Turn external input off and continue?". Pressing OK will disable the trigger for that channel and begin the auto tune. Pressing "Cancel" will dismiss the dialogue, leaving the trigger enabled, and the auto tune will cancel. Additionally, a trigger cannot be enabled on a channel with an active auto tune being run. |
| <imgcaption AT_start|Auto tune menu showing a tune ready to start>{{ :slice:autotune_start.png?400 |}}</imgcaption> | <imgcaption AT_start|Auto tune menu showing a tune ready to start>{{ :slice:autotune_start.png?400 |}}</imgcaption> |
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| Note that there is also an "Auto Tune" option under the "Settings" menu, however this will display the results of the most recent completed auto tune and cannot be used to start an auto tune. Once the auto tune starts, it will progress through several stages, and the user will be updated on its progress through a loading bar. | Note that there is also an "Auto Tune" option under the "Settings" menu. However, this will display the results of the most recent completed auto tune and cannot be used to start an auto tune. Once the auto tune starts, it will progress through several stages, and the user will be updated on its progress through a loading bar. |
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| <imgcaption AT_loading|An auto tune underway, showing the loading bar>{{ :slice:autotune_loading.png?400 |}}</imgcaption> | <imgcaption AT_loading|An auto tune underway, showing the loading bar>{{ :slice:autotune_loading.png?400 |}}</imgcaption> |
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| Once the bar reaches 100%, the user is given the option to accept, review, or reject the results. | Once the bar reaches 100%, the user is given the option to accept, review, or cancel the results. |
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| <imgcaption AT_complete|A completed auto tune with the Accept/Review menu displayed>{{ :slice:autotune_accept_menu.png?400 |}}</imgcaption> | <imgcaption AT_complete|A completed auto tune with the Accept/Review menu displayed>{{ :slice:autotune_accept_menu.png?400 |}}</imgcaption> |
| <imgcaption AT_review|The review menu for a completed auto tune>{{ :slice:autotune_review.png?400 |}}</imgcaption> | <imgcaption AT_review|The review menu for a completed auto tune>{{ :slice:autotune_review.png?400 |}}</imgcaption> |
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| Rejecting the result will exit the auto tune without setting the PID parameters on the temperature channel. However, if the results are rejected, they can still be seen in the "Settings" --> "Auto Tune" menu. | Canceling the result will exit the auto tune without setting the PID parameters on the temperature channel. If the results are canceled , they can still be seen in the "Settings" --> "Auto Tune" menu. |
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| <WRAP center round box 60%><tabcaption firmware_rev |Most recent firmware versions as of July 2022> | <WRAP center round box 60%><tabcaption firmware_rev |Most recent firmware versions as of July 2022> |
| | Firmware | Version Level | Release Date | | | Firmware | Version Level | Release Date | |
| | System Controller | 1.177 | March 2020 | | | System Controller | 2.22 | TBD | |
| | QTC | 1.52 | July 2020 | | | QTC | 2.51 | TBD | |
| </tabcaption></WRAP> | </tabcaption></WRAP> |
| From time to time, Vescent will upgrade the firmware for controlling the SLICE-QTC. The procedure to upgrade the firmware is given [[slice:qt:firmware|here]]. | From time to time, Vescent will upgrade the firmware for controlling the SLICE-QTC. The procedure to upgrade the firmware is given [[slice:qt:firmware|here]]. |
