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Re: (Probably) a new CoreXY-based design - 5 Jahre zuvor

At first sight, the shorter belts are a benefit, but the added gantry weight negates this. Except you have a really big spindle moving very slow. Then the stepper weight is neglectible.

von o_lampe - General New Machines Topics

Re: Paint dispenser with DC motor and encoder - 5 Jahre zuvor

The reason for not spraying the paint is: selective coating. I want to ooze the paint while the toolhead meanders across the selected area. I think, that requires an encoder to sync with acceleration/deceleration moves

von o_lampe - Reprappers

Re: Paint dispenser with DC motor and encoder - 5 Jahre zuvor

Quotethe most significant problem may be that the output is somewhat pulsitile. It would be cool to sync the pulsing with the XY speed to compensate that. In my case it would only be one axis I had to compensate.

von o_lampe - Reprappers

Re: Paint dispenser with DC motor and encoder - 5 Jahre zuvor

Thanks for sharing your experience with these motors. It's probably the stiction of the worm drive that causes this behaviour. It's the same with fan motors running on PWM. You have to start them with 50-100% to make them spin, than you can go down to even 10%. But they wouldn't start at 10% at all.

von o_lampe - Reprappers

Re: tmc2208 and .9 e3d compact but powerful problem - 5 Jahre zuvor

Quotethe .9 degree stepper also works just fine if i throw an a4988 or drv in provided i change firmware, They were working with a4988 with the wrong wiring?

von o_lampe - General

Re: Some "serious" laser-marking with a fiber-laser ... - 5 Jahre zuvor

QuoteVDX and maybe even more time to find some micro-motors to move the arm(s) I saw some very small geared motors ( 6mm motor diameter with planetary gears )...maybe still to big?

von o_lampe - Laser Cutter Working Group

Re: Tap and Die set - 5 Jahre zuvor

QuoteMKSA Buy also a set of metric drill for the hole to be tapped, hole before tapping is diam - pitch, so for M3 drill is 2.5, You're the expert, but I've learned diameter x 0.8 for the drill hole?

von o_lampe - General

Re: Paint dispenser with DC motor and encoder - 5 Jahre zuvor

QuoteEven add another (analog or encoder ) input for fine tuning... Got it! The dispenser has to act like a extruder and by adjusting extruder ratio, I can tune it while it runs. The encoder-wheel of a simple 12864LCD will work too, I hope?

von o_lampe - Reprappers

Re: Paint dispenser with DC motor and encoder - 5 Jahre zuvor

A general question about peristaltic pumps: Are they able to build up any pressure? I don't want to spray the paint, but have a oozeless tip in mind, where the opening is held close by a springloaded delrin ball. The pressure has to lift up the ball.

von o_lampe - Reprappers

Paint dispenser with DC motor and encoder - 5 Jahre zuvor

I want to design a peristaltic pump to dispense laquer. I picked a geared DC motor with encoder to do the job. I think, my Duet-boards can drive it without H-bridge, but how do I config the two encoder lines in RRF for speed control? Even add another (analog or encoder ) input for fine tuning... Thanks for reading

von o_lampe - Reprappers

Re: The gauntlet has been thrown! - 5 Jahre zuvor

Quotefrankvdh 19kW! I guess I'd have to upgrade to a 24V supply then. And you better put the steppers and electronics outside the chamber..

von o_lampe - General

Re: accelleration question - 5 Jahre zuvor

You have to set the 'default acceleration' to something other than '0' to enable setting the others HTH Olaf

von o_lampe - Slic3r

Re: another new core xy - 5 Jahre zuvor

I'm using a short 32mm NEMA 17 and 4mm pitched ballscrews in my CoreXY. The pulleys have a gear ratio of ~3:1 IIRC ( 10k steps/mm on Z with 1/64 microstepping? ) That way you don't loose too much printheight and it has plenty of grunt. But it requires 32bit MCU-power. With trapezoid screws ( maybe 8mm pitch ) it'd be different. They add some friction to the equation Another advice: Try to use '

von o_lampe - CoreXY Machines

Re: Zatsit delta printer running... quite fast! - 5 Jahre zuvor

Unfortunately I couldn't support the campaign, but still want one. Let's hope you sort out all the hazards quickly and let us know, when your sales department starts taking new orders If one of your backers has second thoughts, he/she can PM me. I'm probably willing to take over their part.

von o_lampe - Delta Machines

Re: Build Plate Design - 5 Jahre zuvor

Other people have used magnetic foil or sheet instead of seperate magnets.

von o_lampe - Mechanics

Re: T-Bot: drawing diagonal lines - 5 Jahre zuvor

I just read my own comment and noticed it's the opposite way around: left shift doubles the value, right shift halfes it.

von o_lampe - Developers

Re: Printing on top of PVC - 5 Jahre zuvor

Here's a saxophone made off a plastic kit: Vibrato T1 Awesome Percussions from PVC-pipes

von o_lampe - Reprappers

Re: Printing on top of PVC - 5 Jahre zuvor

As a long time woodwind player I'm all ears I've made some bamboo flutes myself with ancient / rare hole spacing... The latest was a didgeridoo from electric conduit pipe. PVC is horrible stuff to glue to other materials. Best way is to melt and mesh both parts together, I guess. Another option is to make keystocks that bolt on the PVC pipe. You'd need a cylindric printbed with same OD to make

von o_lampe - Reprappers

Re: Flexible spring plate thickness - 5 Jahre zuvor

At work we use very thin sheets to apply solder paste to PCBs. When I'm back from my holidays, I can take a closer look. I'm a bit confused about ( nonmagnetic?) spring steel on printbeds?

von o_lampe - General

Re: Innovations - Release/Public Domain or Patenting? - 5 Jahre zuvor

QuoteVDX to get money and options for the actual "garbage island" project If you want to make money from the raising fear about floods and hurricans, start selling swimming generators with reverse osmosis waterproduction. Or maybe think of recycling plastic to make Corpse bags and Coffins. Sounds rude, but announcing those 'inventions' will probably wake up a lot of people.

von o_lampe - General

Re: Another heated chamber - 5 Jahre zuvor

Wouldn't you create a chimney effect with the gaps at the bottom of the box and between box and upper plate? What if the box deforms from the heat? You can't lower the hotend anymore, except the upper plate is very small.

von o_lampe - General

Re: Innovations - Release/Public Domain or Patenting? - 5 Jahre zuvor

With patents you only want to keep the competition behind you. But by making it open source you can avoid someone else will ever file a patent of your idea and protect his business. ( blocking key technologies ) As I said before, you can not win against global players as long as you play by their rules. The green revolution has to start from bottom up. No government will ever take the neccessary

von o_lampe - General

Re: The J-Head 12 HiFlow Has Been Released! - 5 Jahre zuvor

Will we get silicone socks for the heaterblock? I imagine a bit more parasitic heat transfer compared to 'other' hotends, because of the smaller gap between heaterblock and the alu-parts. Do you use common nozzles? Are they replaceable? I guess, I have to replace the whole heaterblock? If it will fit Duet3D's Smart Effector, I'd give it a try.

von o_lampe - For Sale

Re: pantograph 3d printer - 5 Jahre zuvor

The tape is thin, but it will build up in diameter. That will change your ratio. You'll have to take countermeasures like nonlinear kinematics or increase the diameter of the bed accordingly.

von o_lampe - General New Machines Topics

Re: The J-Head 12 HiFlow Has Been Released! - 5 Jahre zuvor

It's pretty slim! Perfect for tool changing. The heatsink looks, like it would work with remote cooling. Just aim a stream of air to the bottom of the heatsink. Do you have plans for a watercooling jacket?

von o_lampe - For Sale

Re: Zatsit delta printer running... quite fast! - 5 Jahre zuvor

Anyone received their rewards from the crowdfunding yet? I'm keen to see some closeups of the Hilite stuff. edit: Ouch, just read this It's risky promissing fixed delivery schedules, when it entirely depends on when the money arrives from kickstarter. It took three weeks for the funds to arrive

von o_lampe - Delta Machines

Re: Conductive Paint - 5 Jahre zuvor

Quoteruyvieira You know that's actually a good idea? You can make one with two bits of copper clad and a sheet of conductive foam, both of which I just happen to have lying around You could wire it in a wheatstone bridge-fashion to amplify the difference. Or use one on each side of the plate and use an OP-AMP to amplify the difference.

von o_lampe - General

Re: melzi board - 5 Jahre zuvor

Hallo, abhängig davon welches Melzi du hast, musst du noch die Microstepping Brücken löten damit die Stepper nicht zu schnell laufen. Eigentlich laufen sie nur zu weit, weil sie viel grössere Schritte machen... Laut Schaltplan sollten die Pads nicht verbunden sein, aber auf dem PCB-Foto sieht es anders aus? Wegen dem BLtouch Problem kann ich dir leider nicht helfen.

von o_lampe - Reprappers

Re: Linear Rail Cantilever printer build - 5 Jahre zuvor

QuoteThe X axis belt will be routed through the centre hole of the 2040 extrusion and back through the bottom t slit. I only found Bosch extrusions with 6mm slot had enough room to guide a 6mm belt through the slot and clamp it. You might have to twist the belt, so the teeth are on the solid side of the clamp.

von o_lampe - Extruded Aluminum Frames

Re: Linear Rail Cantilever printer build - 5 Jahre zuvor

Seems, like you are in trouble with routing the X-belt. The brass nut of the leadscrew is soo huge.

von o_lampe - Extruded Aluminum Frames