Sainsmart Dds 140 Software Download
While testing, I discovered that the software / controller has an issue with reverse rotation of one of the dual axis motors. I hooked up a multimeter to the motor connector and observed that the pin connected to the startup switch cycles every time that the motor switches directions. I tried to manually program the machine to go backwards, but it seems that I can only move the Z axis to the left and then jump to the right as far as the Z axis will travel. So, how do I get around this problem? The controller seems to work fine, as I can manually control the X and Y axis, but the Z axis seems to only move one way. Is there another way to reverse a rotation of the motors?
i am printing 1/8″ thick acrylic which is black. this is a little thicker than other materials. i have seen good results using 1/16″ thick acrylic, but i have not tried it. i am also using hardwood, which is very durable, so the only concern is the acrylic cracking. i have a small sized laser that i purchased to help out on the etching process. i recommend a solution of 50% water/50% alcohol for this. there is a bottle of this solution in every 3d printer box with a usb cord. i also only etch for about 10 minutes, as i would only want to see a small area. i did not do anything to my alignment the first time around. i only changed the z height between passes. i also etched the sainsmart logo twice in a small area. i repeated the first pass, and did a much better job. this was cause all my variables were the same as the first time around.
i mentioned the sainsmart logo in the last post. it was etched in my first try. i did not change the alignment and had the same feed rate and z height the whole time. i wanted to make sure i have the alignment correct on my next try. it is much easier to try it again and have a high chance of printing correctly the second time. i am very happy with it.
the g-code format is very dense so i went with the program that can work with the sainsmart dds 140 software, the hobby standard universal g-code sender program ugs. this program has detailed setup instructions and a wizard that i have to work my way through before i can use it. while the g-code program i have to learn, it works well and is free and open source, and as i said works well for the sainsmart dds 140.
conclusion: the kit came with a mini cd but i skipped using it and downloaded the documents and software from sainsmart wiki. it has a digital copy of the instructions as well as some windows software and drivers and some gcode for testing. i connected the printer to my pc i didnt have to use the provided driversthen loaded the example gcode. before starting i positioned the bit at the bottom left hand corner with the tip barely touching. i set x, y, and z to 0 home position in the software. then hit run. i etched the sainsmart logo on a piece of acrylic with very little effort. my first pass wasnt perfect, the s and a only partially showed. i am not sure if it is uneven bed or the acrylic was uneven. i started again and it was fine. while using the cnc router, i realized if that happens again i can just go down to 0 height then go 0.1mm lower and zero only the z and start again if i have only partially etched something. i etched the rest of the examples with very little effort. i am doing just simple etches right now to get a feel for speeds and feeds. i think i have been very conservative. 600mm/min feed and 120mm/min plunge at.5mm depth per pass.
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