the main difference between A4988 and DRV8825 is that DRV8825 can do higher amps, as well as 1/32 micro stepping, A4988 can only do 1.5A and 1/16 micro stepping
Forum: Reprappers

If all health hazards were to be put aside, you should be able to vaporize DCM the same way as acetone. I would however still really advise to not do so, there's a reason that DCM is a banned substance in some states in the US. A "better" way to do it would be to stand behind a fan and use a mist bottle to stray at the part but even that is a bad idea in my opinion unless you plan to not breath o
Forum: General

DCM is known to cause cancer in the lung and respiratory systems, I would highly suggest to avoid vaporizing it like acetone.
Forum: General

Bacteria doesnt directly turn PLA (biopellets) into anything, what they do is utilize the starch along side PO4 and NO3 to grow. This can lead to to removal of nutrients from the water. In the case of biopellets, you use it to increase bacteria population and then to have them be skimmed out by the skimmer as a method of nutrient export. That is how biopoellets work (PLA). Now the alkine solution
Forum: General

If you are using slic3r it will lift the Z to your set layer height for first layer. I find parking the nozzle tip right on the bed gives a good layer with slic3r. However if you ever try skeinforge you'll have to remember as SF does not lift it and you'll end up dragging your nozzle on the surface
Forum: General

Heres a test we did at 100 microns layers (0.1mm)
Forum: General

the leadscrew is the motor shaft, an there is no extra length that protrudes the other side of the motor.
Forum: General

Thanks Mazaw, when you say jitters, are you referring to the ridges on the left? If so those are where the layers met and where the clip occurs in the print. Each of the prints have one of these points, When didnt notice the orientation of the photo when we took it. The below photo is what I am talking about Heres another update of the print quality we did on a calibration cube. Who doesnt lov
Forum: General

Here are the results of the same cylinder test that we used. New setup on the left, old on the right. The sets go 40mms/ 60mms/ 80mms/ 100mms
Forum: General

Thanks Cameron, the parts were from when I had built my first mendel. I believe the prices were pair of acme 1/4" with nut: $26 pair of couplers: $14 motors : $18/ea Each motor for the old setup would have costed $38 before shipping was included, so my guess would be anywhere between $40-45 as the purchase was from a while ago. The new threaded Nema 17 will sell for $70/ea. Ditto has the luxu
Forum: General

Hi everyone, So an update from our last post regarding speed vs. quality and time saving and the photos I had posted of the cylinders. We had mentioned that the banding issue from our prints were coming from bent acme rods that we had used within our beta machines. Since then we have swiched the rods out for some threaded rod nema 17 motors. Motors by Tinkerine Studio, on Flickr The motor on
Forum: General

Here's an update as our indiegogo comes near the end of its campaign. We have been working hard to try and bring down the cost of our machine, and with our on going relationship with our parts suppliers we are now able to offer Ditto at at a lower price. As promised we are passing these savings onto you guys. So the prices now stand as the following for the machine kits:
Forum: General

In case anyone has missed the launch of our Indiegogo campaign, here's a list of perks for all your honorable pledges. We appreciate any form of support, so please check us out at . Thanks!
Forum: General

The banding and inconsistent layers are a result of the acme threaded rods we used for the beta machines. They had quite a bit of bend to them and the results are the banding and z wobble that you guys see. This test was also done on the first beta machine with pulleys printed from ABS which didnt have very deep tooth profiles so these prints will show some signs of backlash because of that. We h
Forum: General

In terms of tessellation we are not sure how tessellated it is. The model was quickly done for testing purposes. It could be that the speed is smoothing out from the jerk value set inside marlin. But we want to do more tests with other objects. Yup, these print are single perimeter prints, nozzle size of 0.35mm, and slic3rs default thread width.
Forum: General

I hope this sheds some light in terms of print speed to quality and time saving that has been discussed here. Our findings are pretty interesting: At 80mm/s infill speed, Ditto delivers better quality prints than at 40mm/s, and thats at half the print time. However, the time saving from 80mm/s to 100mm/s is only 1 minute on this small object. On top of that, there is significantly more banding w
Forum: General

For everyone wondering the effects of print speed vs time and print quality we will be doing a test of this today and will be posting the results once we have them. It is something that we believe should be documented and test and I'm sure the community would be interested in it as well. But we would like to take this time to tell everyone that Ditto is now on indiegogo for anyone that is intere
Forum: General

@yydoctt- Thanks again for the suggestions, though we could develop this non-stop, there has to be a point where we say, both the quality and print speed are good so the machine should be released to the general public. After which we can continue to develop and release improvements for the machine as it progresses. It's true that bowdens work, but it is definitely not user friendly for the peopl
Forum: General

Hi Billyzelnack, Thanks for the correction, you are right, the weight is without the motors as we weighed just the plastic portions as the motor was mounted on the machine. The gears do have some problems at this moment due to the plastic characteristic of acrylic, we are most likely moving towards HDPE or delrin for the gears as they dont squeak during use. billyzelsnack Wrote: ---------------
Forum: General

As we get closer to the launch of our Indiegogo campaign, I'd like to share with everyone one of the latest big change to come to the Ditto machine. The extruder system was initially a direct drive. Though it was good at speeds up to 50mm/s, we couldn't use it with faster prints as we tried to push the prints up to 120mm/s (thanks yydoctt for bringing this to our attention). The lack of printing
Forum: General

Heres a short clip of Ditto in action printing a GT2 pulley that all the machines will be coming with for anyone interested. Enjoy! and some end result photos GT2 Pulley by Tinkerine Studio, on Flickr GT2 Pulley by Tinkerine Studio, on Flickr
Forum: General

@tcoleman, thanks for the compliment and feel free to build upon what we have done, after all this is what this community is all about! @yydoctt, thanks for the suggestion! We will look into that, we would love to lower the weight as much as possible as we are now looking towards a geared drive instead of direct drive, so that motor looks promising. Give me until early next week to get a video
Forum: General

As promised here are some of our testing with the gregs extruder, perfect fit! Greg's Extruder Test by Tinkerine Studio, on Flickr Greg's Extruder Test by Tinkerine Studio, on Flickr Greg's Extruder Test by Tinkerine Studio, on Flickr
Forum: General

@DeuxVis, we all know zip-ties too well, they work, but feel very hacked together. One of the core design values for our company is to try and stream line the the end user process. So we believe that anything that feels hacked should be address if possible, thus zip-ties were one of the first to be out the door for a mechanical tensioner. They do however work very well for cable management purpos
Forum: General

You are right it is a clamp system and we do see that it will stretch or perhaps slip overtime. It's something that we are looking into as a possible design improvement to the machine, to improve both the reliability and the durability of the mechanical components. We have looked into some consumer grade 2D printers such as Epson and other brands for inspiration. However, in order to keep the ga
Forum: General

Here are some photos of how the belt tensioning and bushing systems work. We did a couple prototype before determining on which length and style bushings to go for. V1 on the left, V2 on the right Slider Prototype v1 v2 by Tinkerine Studio, on Flickr V3 on the left and V4 on the right Slider Prototype v3 v4 by Tinkerine Studio, on Flickr how the belt tensioning system works. Slider + Belt b
Forum: General

We agree that the bowden design, if tweaked right, can be just as good as a direct drive or geared extruder. Just like you had mentioned, at first you were skeptical, but with enough time invested in tweaking and making sure the retract and speed settings are right it can work wonders. In our humble opinion, the disadvantage of the bowden system is the fact that it does require that extra bit of
Forum: General

destroyer2012 Wrote: ------------------------------------------------------- > I like the fact that the front is open, it seems > to allow for the possibility of making parts > bigger than the print envelope. > > Other than that I am having trouble seeing how > this is different from ultimaker. The gantry is > the same, the z-axis is the same.. > > Do you think that m
Forum: General

@Nudel, Thanks! Everyone at the show said the same. My personal preference is the wood look but I can see why everyone says that about the acrylic version. @yydoctt,Thanks for the feed back already! This is what I love about this community. A possible geared extruder is something that our beta team will be testing out, we skipped on the bowden system but might look into a geared system as it sho
Forum: General

I'll be there with the guys, in fact I NEED to be there.
Forum: Canada, Fraser Valley B.C. RUG