I run a growing CNC kit company and I want to branch into printing. I am tied up on things like CNC router development, moving shop, etc. I want to collaborate with an established developer to bring a SCARA printer and laser engraver to market. The arrangement will be such that I am pretty hands off other than providing guidance on end goals, steering efforts towards something that is marketableby DRobs86 - Polar Machines, SCARA, Robot Arms
MillRight CNC is debuting their first model for as low as $299 without router and mount. It is available with homing switches and some other upgrades for not too much more. This is a pretty capable desktop CNC machine for the price. We have gone as far as making light cuts in 6061 aluminum with it. It has a moving table design and about a 10.25" by 10.25" by 2" working area. Check out the MillRby DRobs86 - For Sale
We just went live with www.millrightcnc.com. We have an intro price on these machines at $299. I am a bit biased, but I think its one of the best values that there has ever been in hobby CNC. Check us out at MillRight CNC Let me know if you need anything or have questions. We are eager to help. Edit: Here is a link to a Youtube video of the MillRight CNC in action:by DRobs86 - CNC Routers, Mills, and Hybrid RepRapping
Millright CNC Check out this new comer.by DRobs86 - CNC Routers, Mills, and Hybrid RepRapping
I think you will find that the runout on most spindles is within tolerance for what you would want to do. I would not use a dental drill.by DRobs86 - CNC Routers, Mills, and Hybrid RepRapping
I am sure it does. I would also like to walk back my previous comment on the peachy team some by clarifying.... I think it was naivity, not malice, that got them in this position. The innocent members of that team are victims too, but it is a shame the controls werent in place to stop the fraud.by DRobs86 - General
I am working on a project now and I even thought about a KS, but this is the kind of thing that puts a bad taste in my mouth about the process. It seems like KS backers keep getting screwed. Also, shame on the peach printer team for such poor governance. I am the accounting supervisor at a company with about 60 people. If I move money electronically, the board gets a report on it. If I write a cby DRobs86 - General
The real answer to this question will be found with plastic injection molders. They melt tons of ABS every week. They would know.by DRobs86 - General
I can see your point. So the plan would be to use an o drive for x and y and use a standard stepper driver for Z (and E if on a printer application). I could see that. The speed is great, but just as important as that to me is tbe closed loop system. That is more of an issue in my applications on x and y so perhaps an o drive would be fitting. Where this could really shine from an economic perspeby DRobs86 - General
Outstanding work! I am a bit concerned, however, that there are only two motor channels. I imagine most any application is going to need three channels. Pick and place probably wont need three channels, but I think you could hurt the marketability of the driver when it comes to CNC and 3D printing by only being able to drive two axes. I think it either needs to be offered in a single channel, aby DRobs86 - General
This obsession with a self replicating plastic machine just blows my mind given the stated goal of it. They already have self replicating machines. Its called a lathe, and they have been here a while. I honeslty commend you all on your genius and your effort, but do you really think that you are going to design a relay driven 3d printer, then send the 300 relays needed to drive it (or maybe justby DRobs86 - Developers
Look up elastic beam deflections equations. Once you know the mass, length, and area moment of inertia you can find the deflection. You can of course rearrange everything to find the moment of inertia required to meet your deflection tolerance.by DRobs86 - Reprappers
You just have to temper stretch vs acceleration. The faster you accelerate, the more you stretch. And thats for any line or belt. Taking a step back here... I could start braiding hair together for power transmission, but wht not use a belt instead? If you are determined not to use a belt use steel cable not fishing line.by DRobs86 - General
I am not following you. I dont see an X 100 anywhere in that g code. You say that of "course the X axis does move when printing the actual object"... Well that looks like code that starts printing at x79.698 y79.698... So what exactly is it not doing?by DRobs86 - Reprappers
I would avoid the Chinese kit. I dont own one, but everything I have seen of other Chinese kits indicates that they have no support and terrible documentation.by DRobs86 - CNC Routers, Mills, and Hybrid RepRapping
Make it easy on yourself and grab an Uno and CNC shield and just run grbl.by DRobs86 - CNC Routers, Mills, and Hybrid RepRapping
QuoteTraumflug QuotefrankvdhI suspect that a part of the answer is buying in bulk... if you buy a million chips, you'll get them for a lot less than $1.70 each. Nope, $1.70 is bulk price already. QuotefrankvdhWhat happens to the chips that fail Atmel's QA process? They're supposed to be destroyed, but in reality they're sold as faulty to 3rd parties for a few cents each. That's quite possible.by DRobs86 - General
This is oversized for a printer unless its bigby DRobs86 - Developers
No. You could use an uninterruptable power supply or a car batter to supply everything if you are havibg trouble with power outages interrupting your prints.by DRobs86 - Developers
I am not familiar with the feature but in most decent CAD programs you can make a sketch from a face. From there it will probably support exporting as a dxf or svg.by DRobs86 - General
I have a lot of 9mm wide GT2 belt, 20 tooth pulleys for 5mm shaft stepper motors, and 20 toothed idler pulleys with a 5mm inside diameter. Belt is just 4.75 per meter. This is the wide belt. I also have the drive pulleys for this belt, 20 tooth, GT2 profile. These drive pulleys are made for the wider belt. Each pulley has 2 set screws. The belt mating surface is 11mm wide and the total width isby DRobs86 - For Sale
I've come into some eccentric spacers. I have some eBay ads that I've linked below, but if you want some just let me know by PM or by replying. I take PayPal. I'll knock a little money from my eBay ads for anyone that buys through the forum: Nine eccentric spacers for $11.50 plus 2.50 shipping Twelve eccentric spacers for $14.80 plus 2.50 shipping Twenty eccentric spacers for $21.50 plus 2.by DRobs86 - For Sale
You would be better off just running gorilla glue down a hole. Be careful though as it expands and could rupture the print.by DRobs86 - General
QuoteKoko76 It is pointless to generalize "what is flatter". Material varies, and doesn't always meet spec. An indicator and a known reference flat will tell you the actual answer. As well as the you actual info if it isn't within spec. Glass isn't inherently anything, and can and does bend, especially at the size in question, and especially when it's base isn't flat. The op won't use glassby DRobs86 - General
Quotethe_digital_dentist Where does the idea that a piece of glass is flat and won't flex come from? I am open to correction, but its my understanding that glass plate is much much flatter than aluminum plate. I didnt say it was necessarily stiff, but it laying ontop of his wavy aluminum plate is a better print surface. Pearce feel free to use whatver you like. Its your money you are spending,by DRobs86 - General
A piece of glass is going to be your only hope in terms of a bed with a planer surface.by DRobs86 - General
I guess I missed the part where we switched to a moving gantry. I thought we were still building a prusa style machine. Im glad for Pearce's sake that the bed will be stationary. I agree with you koko on brazing the angle to it before milling. You are correct on the order thi gs should happen.by DRobs86 - General
Ya, koko is right. The physics of the matter are always true whether or not you ignore them. Auto tramming can help but it only goes so far. I would mill the plate flat and braze some one inch aluminum angle to the underside of said plate. That takes care of flatness and the rigidity issue of a quarter inch plate over that kinda span. By the way a 6 square foot quarter inch thick plate is aboutby DRobs86 - General
While I agree that Pearce lacks the skills for this build, that style machine can work for 3d printing. You can print all the way to gantry height depending on how the Z stage is set up. Pearce. I have to be honest. You will waste money. Look up the flatness specification on that sheet and tell me if you think that ia suitable for 3d printing. You either need a much more expenaive tooling plateby DRobs86 - General