Voron Cascade grblHAL Web Builder Profile

Vendor-style Web Builder profile for:

• Machine: Voron Cascade CNC
• Controller: BTT Scylla V1.0 / STM32H723
• Driver: STM32H7xx
• Stepper drivers: TMC5160 over SPI
• Axes: XYZ
• Spindle: INVT GD10 via grblHAL MODVFD
• Max spindle speed: 24,000 RPM
• SD card enabled
• USB CDC enabled
• Optional ESP-AT variant

Files

• profiles.json — registry file to expose the machine to Web Builder.
• profiles/voron-cascade.json — actual machine profile.

Values captured from the current Voron Cascade configuration

• Steps/mm: X/Y/Z = 853.33294
• Max rate: X/Y = 5000 mm/min, Z = 3000 mm/min
• Acceleration: X/Y = 100 mm/s², Z = 50 mm/s²
• Travel: X = 260 mm, Y = 220 mm, Z = 100 mm
• Homing direction mask = 2:
  • X homes positive (Max)
  • Y homes negative (Min)
  • Z homes positive (Max)
• Homing order:
  • Cycle 0: Z
  • Cycle 1: X + Y
• Homing seek/feed = 500 / 50 mm/min
• Pull-off = 1.0 mm
• Locate cycles = 2
• Hard limits = enabled
• Soft limits = disabled
• TMC5160 current = 3000 mA X/Y/Z
• Microsteps = 16
• Hold current = X 50%, Y 50%, Z 60%

Safety/control choice

This profile intentionally uses:

CONTROL_ENABLE = 7

which means firmware controls are:

• Reset
• Feed Hold
• Cycle Start

The machine E-Stop should remain a hardwired safety chain that removes dangerous power, rather than relying on a firmware-only E-Stop input.

This differs from one older experimental Web Builder export which used CONTROL_ENABLE=70.

MODVFD

SPINDLE0_ENABLE = 5 selects grblHAL MODVFD and the profile enables Modbus.

The finalized Voron Cascade / INVT GD10 runtime values are:

Setting	Value	Function
$462	8192	Run/Stop register
$463	8193	Set-frequency register
$464	12288	Get/output-frequency register
$465	1	CW run command
$466	2	CCW run command
$467	1	Stop command
$468	50	RPM input multiplier
$469	60	RPM input divider
$470	60	RPM output multiplier
$471	100	RPM output divider

These values are intentionally not placed in Web Builder setting_defaults. In the current grblHAL MODVFD plugin they are non-core NVS settings and the plugin restore routine hard-codes its own defaults. Therefore this repository includes:

• post-flash-runtime-settings.txt — paste/run these commands in gSender after flashing.
• verify-runtime-settings.txt — commands to read the values back.
• runtime-settings.json — machine-readable record of the finalized runtime values.

After applying the post-flash settings, power-cycle or hard-reset the controller before final spindle testing.

ESP-AT variants

Two variants are supplied:

1. USB + MODVFD
2. USB + ESP-AT + MODVFD

Use the first variant while debugging or when Wi-Fi is not required.

No Wi-Fi SSID or password is stored in this repository/profile.

Important: Scylla bootloader entry

The current STM32H7xx Web Builder driver exposes both the regular BTT Scylla H723 target and a bootloader-compatible target using the same board symbol BOARD_BTT_SCYLLA.

The vendor profile therefore selects the Scylla board family, but you should still verify the Web Builder board/target dropdown before compiling. If you need the bootloader image, select the BTT Scylla H723 (bootloader) target.

Install / publish

1. Create a GitHub repository, for example grblhal-profiles.
2. Upload this folder structure unchanged.
3. Replace every coolboysalam placeholder in:
   • profiles.json
   • profiles/voron-cascade.json
4. Commit/push.
5. Use the hosted profiles.json URL as the vendor profile-list URL for Web Builder.
6. Select Voron Cascade and the desired variant.

Applying compiled defaults

grblHAL stores settings in non-volatile storage. After flashing a firmware built from this profile, existing settings can remain in NVS. Back up the current settings first, then use the appropriate grblHAL restore command (commonly $RST=*) only when you intentionally want the firmware DEFAULT_* values to replace the stored settings.

Version

GitHub-ready profile: 2026-09-04

Final GitHub locations

Repository:

https://github.com/coolboysalam/grblhal-profiles

Vendor profile list:

https://github.com/coolboysalam/grblhal-profiles/blob/main/profiles.json

Machine profile:

https://github.com/coolboysalam/grblhal-profiles/blob/main/profiles/voron-cascade.json

GitHub account:

coolboysalam

The repository should be public so Web Builder can fetch the profile without authentication.