This is how to install the drivers on to a new Windows machine.

The Feeltek controllers "locks" to the first machine it is installed to.

So this is a way to go around that.

Install steps:
Download the file.
Right-click the new driver and choose Run as administrator, then install.
Use Lenmark Device Access Control to check the driver recognition status.

If the driver is shown as LenMark Boot Loader, right-click to delete it and wait for refresh.
The correct name is Lenmark Device.

Download LenMark USB Drivers LenMark 3D 4.3.8.240830
Download: Lenmark 3DS software:
LenMark_3DS_x64 - Release date 260421 (Latest)

Lenmark 3DS Update - 04/21/26

Software release notes
Document Version 3.7

Update Contents

  1. Model serial numbers and transformation matrix parameters are now saved; parameters for multiple-pass cleaning operations have been added to the document save data. (Document version incremented to 3.7).
  2. Added a "Select for Processing" function to the batch file marking feature.
  3. Added a crosshair drawing function.
  4. Added a multiple-pass cleaning function.
  5. Added a confirmation dialog box before deleting a model.
  6. Added parameters for setting the fill marking mode within the Ethernet interface SDK (secondary development kit).
  7. Added an interface for integrating with MES system databases.
  8. The "unlimited" maximum marking speed setting has been capped at 100,000.
  9. Optimized point object recognition during CNC file imports.
  10. Enabled row highlighting for selected items in the multi-document marking list.
  11. Integrated the digital galvanometer status interface.

Bug Fixes

  1. Fixed a flickering issue that occurred when loading files in batch marking mode.
  2. Fixed an issue where standard marking failed to emit laser light after pausing a deep engraving or relief engraving operation.
  3. Fixed an issue regarding vector angle reconstruction for user-created models.
  4. Fixed an issue where marking parameters were not applied when opening or closing documents via the Ethernet interface SDK.
  5. Fixed an issue preventing marking when the outline of an object—set to "fill only" marking mode—extended beyond the marking field boundaries.
  6. Fixed an issue regarding the saving of model transformation matrices.
  7. Fixed issues related to the "fill only" marking logic for MPLine objects — added parent object type information to the document save data; ensured that slice objects are not modified during this process.
  8. Fixed issues where memory was not fully released and grouped objects were not cleared when opening or closing multi-document projects.
  9. Fixed an issue where the laser failed to fire during cleaning passes while calculating the dimensions of an MPLine object.
  10. Fixed an issue where vertical cone objects were not displayed.
  11. Fixed an issue where custom cone models failed to display after being oriented vertically.
  12. Fixed an issue causing calculation anomalies in split marking mode when the platform size exceeded 2100 units.
  13. Fixed an issue where the display became incorrect after separating a textured object and then performing an "Undo" operation.
  14. Fixed issues related to pixel data, bitmap textures, and display anomalies that occurred after importing a bitmap and then performing an "Undo" operation.
  15. Fixed display refresh issues related to snap points and curve drawing for line and curve objects.
  16. Fixed an issue where the center point coordinates became incorrect when rotating one object immediately after rotating another.
  17. Fixed issues involving shell errors occurring after splitting the shell and subsequently scaling the model.
  18. Fixed issues regarding excessive video memory usage—specifically, the failure to properly release memory—following the frequent opening and closing of documents.
  19. Fixed issues related to re-splitting the shell after scaling the model.
  20. Fixed issues concerning rotational transformations.
  21. Fixed issues with the mesh interface for secondary development; specifically, ensuring that filling parameters take effect even when only a single parameter is modified.