3D-printing/Configurations
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# Overview
This configuration is built and tested for the MakerGear M2 Revision H. I will try to note obvious differences in the other revisions to help support them. Some of the original firmware's notes are incorrect but [many of the details are available here](//makergear.zendesk.com/hc/en-us/articles/360022528292).
# MakerGear M2 Rev.H
# Z Max Homing on Rev F, G, H
Revision E moved the Z endstop switch to the bottom/max. For all other revisions set `Z_HOME_DIR` to -1 for Z Min Homing. This is not a common configuration and certain unexpected behaviours may occur. The primary solution has been to move off the endstop by 5mm with `HOMING_BACKOFF_POST_MM`. This mitigates the current Bed Tramming routine moving down by `BED_TRAMMING_Z_HOP` which defaults to 4 and does not respect Z_MAX_POS.
## Overview
This configuration is built and tested for the MakerGear M2 Revision H. I will note obvious differences in the other revisions to help support them. Some of the original firmware's notes are incorrect, but many of the details are available [here](//makergear.zendesk.com/hc/en-us/articles/360022528292).
## Z Max Homing on Rev F, G, H
Revision E moved the Z end‑stop switch to the bottom (max). For all other revisions set `Z_HOME_DIR` to –1 for Z‑min homing. This is not a common configuration, and certain unexpected behaviors may occur. The primary solution has been to move off the end‑stop by 5 mm with `HOMING_BACKOFF_POST_MM`. This mitigates the current Bed Tramming routine moving down by `BED_TRAMMING_Z_HOP`, which defaults to 4 mm and does not respect `Z_MAX_POS`.
### Warnings
If the bed is left all the way up. Take care when doing things like loading filament immediately after powering on the printer. With Z Max homing the printer will not lower the bed because it may be at Z Max but it will raise it after. This raise/lower prior to homing can be eliminated with `NO_MOTION_BEFORE_HOMING` at the cost of being able to jog the motors while not homed. Prior revisions have the opposite and/or less of a problem. They will lower the bed (even if all the way down) and raise after.
If the bed is left all the way up, take care when loading filament immediately after powering on the printer. With Z‑Max homing the printer will not lower the bed because it may be at Z‑Max, but it will raise it after. This raise/lower prior to homing can be eliminated with `NO_MOTION_BEFORE_HOMING` at the cost of being able to jog the motors while not homed. Prior revisions have the opposite and/or less of a problem. They will lower the bed (even if all the way down) and raise after.
## Motor / Endstop / Pulley Changes
### Endstops
- Rev F, G, and H are Normally Closed (Hit State HIGH)
- Earlier Revisions are Normally Open (Hit State LOW)
- Rev F, G, and H are normally closed (hit state HIGH).
- Earlier revisions are normally open (hit state LOW).
### Z Motor
- Black Motors on Rev F, G, and H require `INVERT_Z_DIR true`.
- Black Motors on Rev C.1, D, D.1, E and E.1 should be false.
- Silver Motors on older revisions should be true.
- Black motors on Rev F, G, and H require `INVERT_Z_DIR true`.
- Black motors on Rev C.1, D, D.1, E, and E.1 should be set to false.
- Silver motors on older revisions should be true.
### Extruder Motor
- INVERT_E0_DIR false for Rev F, G and H
- Previous revisions are currently unclear but likely set to true.
- `INVERT_E0_DIR false` for Rev F, G, and H.
- Previous revisions are currently unclear but likely set to true.
### Steps Per MM Changes
- Revision G and H use 16 tooth pulley specifed as 80.1
- Prior Revisions use 18 tooth pulley specified as 88.88 or 88.89
- Silver Z Motors are T8x8 specified at 400
- Black Z Motors are Imperial 1/8" specified at 1007.7
- Rev G and H use a 16‑tooth pulley specified as 80.1.
- Prior revisions use an 18‑tooth pulley specified as 88.88 or 88.89.
- Silver Z motors are T8×8 specified at 400.
- Black Z motors are Imperial 1/8" specified at 1007.7.
# Hotends
Specified operating temperatures by version. Firmware maximums were typically plus overshoot.
- v3a - 220ºC
- v3b - 250ºC
- v4 - 290ºC
## Hotends
Operating temperatures by version (firmware maximums are typically plus an overshoot).
- v3a – 220 °C
- v3b – 250 °C
- v4 – 290 °C
# Setting Distance Between Nozzle and Bed
Most revisions use M206 to set the nozzle distance from the bed. Z Max homed revisions will be a slighty different experience from Z Min homing. I have set the Z Max to 210 which on my Rev H puts the nozzle a little over 1mm from the bed before dialing this in. My printer currently as an example has M206 Z1.2 set. If I changed Z_MAX_POS to 200 I would have to do M206 Z11.2 instead.
## Setting the Distance Between Nozzle and Bed
Most revisions use `M206` to set the nozzle distance from the bed. Z‑Max homed revisions will experience a slightly different workflow from Z‑Min homing. I set the Z‑Max to 210, which on my Rev H places the nozzle just over 1 mm from the bed before dialing this in. My printer currently has `M206 Z1.2` set. If I changed `Z_MAX_POS` to 200, I would need to set `M206 Z11.2` instead.
### Basic Guide
- Power on the Printer
- Connect Pronterface first as it will reset the printer
- Home `G28`
- Move X and Y to Bed Center `G1 F4000 X100 Y150`
- Move Z Up to 0, You can be careful but not going all the way at first.
- First Move very close `G1 F1800 Z5`
- Slowly move the rest of the way `G1 F100 Z0`
- At this point your nozzle probably is not close to the bed at all. Measure or take your first guess at how much closer you need to be.
- Enter this first attempt lets say 1mm with `M206 Z1`
- Home `G28` and move back to check the adjustment `G1 F4000 X100 Y150 Z0`
- Adjust again for example .2 mm closer enter the full amount total `M206 Z1.2`
- Rinse and Repeat the last 2 steps until you feel ready to test printing
- Saved the setting with `M500`
1. Power on the printer.
2. Connect Pronterface first; it will reset the printer.
3. Home with `G28`.
4. Move X and Y to the bed center: `G1 F4000 X100 Y150`.
5. Move Z up to 0. Be careful not to go all the way at first.
- Move very close: `G1 F1800 Z5`.
- Move the rest of the way: `G1 F100 Z0`.
6. At this point your nozzle probably isn't close to the bed at all. Measure or guess how much closer you need to be.
- For a first attempt of 1 mm, enter `M206 Z1`.
- Home with `G28` and move back to check the adjustment: `G1 F4000 X100 Y150 Z0`.
- Adjust again, e.g., 0.2 mm closer, by entering the full amount total: `M206 Z1.2`.
- Repeat the last two steps until you're ready to test print.
7. Save the setting with `M500`.
If the printer's bed is not trammed I would tram it now under Probe & Level. During the first test print double click the screen knob to activate baby stepping. If you find you need further adjustment for example we moved +.05 away from the bed to make it just right you can later adjust your M206 value from 1.2 to 1.25. Don't forget to save.
If the printer's bed is not trammed, tram it now under **Probe & Level**. During the first test print double‑click the screen knob to activate baby stepping. If you find you need further adjustment—for example, you moved +0.05 mm away from the bed to make it just right—you can later adjust your `M206` value from 1.2 to 1.25. Don't forget to save.