- Monoprice MP Mini Delta
INFORMATION NEEDED TO PROCEED WITH ORDER FULFILLMENT:
- After placing your order please provide the stepper motor model number from either the X, Y, or Z motors and also the extruder stepper motor model number. You may send this information via the contact us page or reply to your order confirmation email.
- The stepper motor model number is required to proceed with your order. There have been some recent changes to the Mini Delta motors. The Mini Delta has started using stepper motors with a phase resistance of ~2 Ohms. From the beginning and up until the last month or two the Mini Delta has had stepper motors with a phase resistance of ~10 Ohms. Most users will have the 10 Ohm motors but confirmation is still needed to be sure that you are sent a board that is configured for your Mini Delta.
- Mainboards are being made available for pre-order due to many customers requesting this option. There will likely be a two week wait from when you order to when the board ships. The estimated shipping date shown on the product page is exactly that. The date shown must be manually changed and sometimes overlooked. Boards may be added to the inventory in small batches so may show out of stock for a short time. This is done as a reminder to change the estimated shipping date by a few days. It may be a few days off from the actual shipping date. This mostly applies to the "quiet" option but may at times be somewhat true for the stock option.
- The stock mainboard now comes with four HR4988 stepper drivers. Each stock mainboard has at minimum one test print ran with it to verify all is working. Most often the board is not tested until after ordered to ensure that it indeed was tested and working just before being sent to the customer.
- Each "quiet" board is a stock mainboard modified by hand to remove the four HR4988 stepper drivers and replace with four Trinamic TMC2208 stepper drivers. Also each stepper driver circuit will have the charge pump capacitor swapped as is recommended by Trinamic. Each quiet board has three to five print test ran totaling between 15 and 25 hours of actual print time. Print test are ran with the bed heater set between 50°C and 60°C and with a reduced bottom fan speed by installing a 150 Ohm resistor inline with the fan wiring (not included with board purchase).
- It is not recommended to run the printer without a bottom fan to cool the motors and electronics. This applies for both the stock boards and the quiet boards. Printing without a fan may lead to failed prints due to overheating stepper drivers.
- If you order additional items with the mainboard please know that they will not be shipped until your mainboard is shipped. If you would like those items right away please order those items separately.
Here is a Google Photos album with videos and a couple pictures that show off the TMC stepper drivers.
Basically it will make the printer much quieter when printing. The fans will be the loudest part of the machine and then maybe a little bearing noise but that will vary from printer to printer.
I will not claim that swapping the stock A4988 stepper drivers with TMC2208 stepper drivers will make prints come out better or print faster. I will say that this upgrade will make the printer much quieter without loss of quality or speed. No firmware modifications are needed. No hardware changes have to be made by the user to accommodate the upgraded drivers. As far as the user is concerned all is the same in regards to hooking up the board and printing with the same slicer settings as used before.
NOTE: The TMC2208 drivers are running in "legacy mode". The TMC2208 will interpolate received step signals to 256 microsteps. UART is not available in legacy mode.