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Current version by: Maz ,

Text:

I followed these steps exactly:
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Installing the DRV8825 boards is really as simple as:
 
Attach the heatsinks to the chips on each board -- most come with peel-n-stick thermal tape (clean off the chip with isopropyl alcohol and let dry, then peel the backing on the tape, line-up and stick it in place, holding it firmly for a minute or so to set).
 
Hook an ohm meter between the metal top part of the pot (the wiper) and a ground pin (look for a pin labeled "gnd" on the board and use it) and adjust until it reads 2575 ohms or slightly higher to set it for 1.7A (X, Y, and Z axis). Or 2121 ohms for 1.4A (extruder). [*** Or if you prefer, you can wait until after you've installed them and powered up your BoXZY and use a volt meter instead to set them, measuring the voltage from the pot's wiper to ground -- use 0.85V for a 1.7A setting (X, Y, and Z) and 0.70V for a 1.4A setting (extruder) ***]
 
Clip the appropriate step select pins with cutters. For X and Y axis, clip pins MS1 and MS3 to select 1/4 steps. For Z axis, clip pin MS3 for 1/8 steps. And for the extruder, clip MS1 and MS2 for 1/16 steps.
 
Turn off all power to your BoXZY and disconnect from USB. Open up your BoXZY's electronic bay. Remove the A4988 boards. Plug in the DRV8825 boards making certain that they are turned correctly with the pins labeled 'EN' lined up.
 
Put the cover back on your BoXZY and plug everything back in.
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I measured the resistence but I can check it by voltage now that its all back together again. unfortunately i dont have one of those cool IR thermometers so i cant easily tell how hot the DRV8825's are getting.

Status:

open

Original post by: Maz ,

Text:

I followed these steps exactly:

Installing the DRV8825 boards is really as simple as:

Attach the heatsinks to the chips on each board -- most come with peel-n-stick thermal tape (clean off the chip with isopropyl alcohol and let dry, then peel the backing on the tape, line-up and stick it in place, holding it firmly for a minute or so to set).

Hook an ohm meter between the metal top part of the pot (the wiper) and a ground pin (look for a pin labeled "gnd" on the board and use it) and adjust until it reads 2575 ohms or slightly higher to set it for 1.7A (X, Y, and Z axis).  Or 2121 ohms for 1.4A (extruder).  [*** Or if you prefer, you can wait until after you've installed them and powered up your BoXZY and use a volt meter instead to set them, measuring the voltage from the pot's wiper to ground -- use 0.85V for a 1.7A setting (X, Y, and Z) and 0.70V for a 1.4A setting (extruder) ***]

Clip the appropriate step select pins with cutters.  For X and Y axis, clip pins MS1 and MS3 to select 1/4 steps.  For Z axis, clip pin MS3 for 1/8 steps.  And for the extruder, clip MS1 and MS2 for 1/16 steps.

Turn off all power to your BoXZY and disconnect from USB.  Open up your BoXZY's electronic bay.  Remove the A4988 boards.  Plug in the DRV8825 boards making certain that they are turned correctly with the pins labeled 'EN' lined up.

Put the cover back on your BoXZY and plug everything back in.

I measured the resistence but I can check it by voltage now that its all back together again. unfortunately i dont have one of those cool IR thermometers so i cant easily tell how hot the DRV8825's are getting.

Status:

open