85 lines
2.5 KiB
Markdown
85 lines
2.5 KiB
Markdown
# Multichannel PID controller
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Purpose of this PID controller is to lower overall amperage by cycling periodically through SSRs.
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This is based on [osPID](http://ospid.com/blog/download/)
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### Hardware
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- [Controllino - Mega (Arduino compatible)](https://www.controllino.biz/product/controllino-mega/). [See PIN layout](./vendor/controllino/CONTROLLINO-MEGA-Pinout-1.jpg)
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- Optional: OLED & keypad control
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- 8 channels
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- Optional: Modbus
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- TC sensor module, MAX6675 | MAX31855
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## Features
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### PID
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- Autotune per PID
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- Support for multiple TCs (see Marlin firmware)
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### Configuration
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- Set max Amp
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- Set max/min heat time per cell/partition
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## Milestones / Todos
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- [x] Check/Simulate performance bottle necks for Mega
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- [x] Temperature logger, serial & MaxC based
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- [ ] Integrate PID/Auto-tune
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- [ ] EEprom storage ?
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- [x] Debug interface via RS485
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- [x] Data - reader via RS232 (Matlab)
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- [ ] Configuration (remote / local) -> Control-Freak - HMI
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- [-] Model testing/verification
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## Edge cases / Errors
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- [ ] PID-Partition Timeout : PID didn't reach target with limits
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- [ ] PID/Partition Overshooting : PID or operator malfunction
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- [ ] PID Auto-tuning timeout : autotuning too long
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- [ ] PID/Partition interference : partition overlap noise ?
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## Modes
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- [ ] Groups (partition groups)
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- [ ] Serial (single linked partition group)
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- [ ] Remote (HMI & control)
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- [x] Master controller, only. Eg: control other PIDs via Modbus
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## PP/PH
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### New parameters
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- [ ] Ramp-time
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- [ ] Amp Budget
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- [ ] Sub SP hold time
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### New behaviours
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- [ ] Currently there are multiple issues surfacing regarding the sheetpress. A profile should allow to have multiple target temperature points (eg: 1 hour to hold softening point, 30 mins for holding melting point rage, 10 mins for slightly over melting point : pressing phase) with a holding & ramp time each.
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- [ ] The user should be able to adjust these profiles per flake size. For that we should also study the effects of various flake sizes regarding stresses created in the sheets.
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### Modbus Implementation
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- [-] Should implement broadcast queries : Status (Run/Alarm,...) , SP(s) & PV
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### References
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- [PID research](https://gitlab.com/plastichub/osr/research#pid-control)
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### Hydra tests/experiments
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- [x] calc. heat transfer, x & square (with screw | without screw | loaded)
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- [x] Inkbird vs Rex
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- [x] PID param transfer from E5 to Inkbird, Rexc : NO
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- [x] test TC mount variants
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- [x] different man. PID params (soak, hysteresis, ..)
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