SainSmart Melzi May 08, 2014 10:40PM |
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Re: SainSmart Melzi May 09, 2014 05:07AM |
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Re: SainSmart Melzi May 09, 2014 12:22PM |
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Re: SainSmart Melzi May 09, 2014 02:18PM |
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Re: SainSmart Melzi May 09, 2014 04:11PM |
Registered: 9 years ago Posts: 13 |
Re: SainSmart Melzi May 09, 2014 05:11PM |
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Re: SainSmart Melzi May 09, 2014 05:31PM |
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Re: SainSmart Melzi May 09, 2014 08:45PM |
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Re: SainSmart Melzi May 09, 2014 09:02PM |
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Re: SainSmart Melzi May 10, 2014 12:45AM |
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Re: SainSmart Melzi May 10, 2014 01:22AM |
Registered: 9 years ago Posts: 13 |
Quote
Most Helpful Customer Reviews
1 of 1 people found the following review helpful
No support, doesn't work, defective connectors
By Joseph Turner on February 16, 2014
Verified Purchase
O bought this Melzi to upgrade the electronics on my Makerbot Cupcake so I could use a MBE v9 extruder with it.
It was selected over other Melzi's because it came built with RAMPs style screw terminal sockets. You can screw the wires in and still unplug the connector later if needed. Pretty useful to me since the Cupcake's stepper motors are not wired RepRap style and thus I needed to cut the stepper motor connectors off anyway.
Unfortunately 3 of the screws on the stepper motor connectors were defective. You would turn the screw counter clockwise and the metal piece inside wouldn't move.
The larger issue though is the board comes loaded with test software that moves the X Y Z axis around and I have been unable to reprogram it with Marlin. When powered, either USB or 12V (moving the jumper), the red LED blinks. When it is blinking the unit is maniacally moving X Y and Z. When I set the reset jumper, it keeps running the test program. When I attempt to use Arduino IDE to reprogram it I get an STK500v1 error. Manually pushing the reset button during upload attempts yields no results either.
All I can guess at this point is the test program is loaded as the boot loader leaving anyone buying one to need to flash the boot loader to install 3D printer software. In addition the ISP header is not soldered in so flashing the boot loader would require soldering the board with no guarantee I'd be able to fix it even then.
I've looked around for support and found nothing.
Definitely planning a return of the board if Sain Smart doesn't respond to this review.
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No bootlader or damaged, need an ISP flash
By The_ccm on April 26, 2014
I can confirm review above, the melzi from Saintsmart comes with a test program, which just blink the led on the board. I tried to get it work with many arduino IDE, 1.01 , 1.05 and even 0022 0023 with custom folders but none worked. I think the boot loader is just missing. The fix :
- solder header on the ISP via on the PCB. It does not require high soldering skills as there is no component next to the ISP holes so you have place to do it.
- get latest arduino IDE (1.05) and get the Maniacbug boot loader on GitHub, based on optiboot (mighty-1284p folder)
- get an ISP programmer such as avrisp programmer for 10$, and burn the boot loader.
- the board is ready now, you can flash the board with Marlin firmware or other one you like.
Re: SainSmart Melzi May 10, 2014 04:14AM |
Admin Registered: 17 years ago Posts: 7,879 |
Re: SainSmart Melzi May 10, 2014 04:35AM |
Registered: 10 years ago Posts: 541 |
Quote
nophead
I recommend the bootstrap I include in the Melzi folder as again not all bootstraps and fuse settings are equal.