So, my hybrid machine has a jhead (1.75/.4mm) and i'm using a Makerbot 3.6 Extruder Controller. I think that 3.6 board was developed for a cartridge heater, 12V 40W, that is large versus the compact brass hotend. (hotends.com!) Does anyone know if the resistor for the Jhead can be used and not the cartridge heater? makerbot say to use the cartridge, but I wonder if the board can be programmedby davew_tx - Controllers
So, the way I see it, there are two requirements for each tower axis. block drive and 5DoF linearization. R&P gives drive, but no linearization. linear rail/blocks have no drive but 5 DoF. round rod and LM8UU bearings give no drive and only 4DoF each, so two are needed per column. to remove rotation. (other ways to do it other than two) If you could drive one of the Sarrus arms directlyby davew_tx - Delta Machines
@xiando: I saw that last guy bust your balls for your fair opinion. that guy is a dooche, and he's the stupid lazy h8r. at $500, you are doing really well, even if you're only half way-ish. @rich: that chart did not show up for me. Can anyone else see it. maybe attach instead of embed?? I'd agree that the whole product category needs a more seamless integration from art to part. Theby davew_tx - General
@ Acumen: For me, R&P, in a precision setup, would be expensive, and maybe noisy if running zero clearance or contact pressure to eliminate gear slop. That would also put the stepper (heavy-ish for NEMA 23) on a moving member, which will possibly cause overruns at quick direction changes. Running downhill, that stepper has to stop and oppose momentum and gravity. I selected an XL belt, at 1by davew_tx - Delta Machines
nice blend and seems to model the results from a lathe operation well. what you would expect to see. Daveby davew_tx - 3D Design tools
$300/kg Nothing new for this price, although the amount on a spool for mojo is more than UPRINT. Uprints have 1.1 lbs per spool and cost $150 each, so yes $300/kg on UPrint also. I see a side market for spent mojo print cartridges. someone will figure out a jailbreak circuit board to drive them in their Mendel or SpideyBot. I wonder who will start the first 1.3mm extrusion supply. I'm sureby davew_tx - General
@rich (sorry for hijacking this extrusion thread further) wish I could turn back time a bit (damn you ROSTOCK!), as I feel the financial tractor beam pulling me towards the gantry first. cash avalanche has me buried on this one. Will be assembling in very near future, just need a couple more corner rod towers printed. The 80/20 bits are here already as well. I agree that Delta is the future.by davew_tx - General
The working volume upper surface is a rounded triangular dome shape. I have 17 inches at the three columns in an arm down situation, with 24 inches at the center. The frame height of 1.6m gives some extra height. Dave (edited to remove poor tone)by davew_tx - Delta Machines
My vision for a SpideyBot is coming along nicely: 1.6m tall frame, easily enclosed for heated chamber, instead of HBP. 80/20 frame, 6X, 6mm, simple flat plates join it all together. 1.24m linear rail and block design, one per column. THK RSR15 size NEMA23 steppers, belt drive 1m carbon fiber tubes, Goodwinds .6inch diameter 10mm rod ends from VXB currently designing the head. considering a mby davew_tx - Delta Machines
Your print quality is the best I've seen. Freakishly sharp. I hope to have the same success tweaking the multitude of parameters when I reach that stage on my two custom machines. Daveby davew_tx - General
My $0.02: The Tangy-bot has more of a sour taste for me. The profits associated with the race to the bottom, can't put food on the table for long. Hopefully, it will not reach funding. If it does, we can all watch as the comments pile on for delivery and updates, and status and why and what and when and etc. I wouldn't wish upon my enemies Kickstarter's relentless onslaught of masters to servby davew_tx - General
I've used www.econobelt.com with great success. I personally use XL, but they have many kinds there. I am not sure the relationship, but the website feels like SPD-SI or an offshoot in some way. It shows QTC as a top portal to econobelt, but has the SPD-SI book with their QTC logo on it?? They have CAD models for download, and plastic and aluminum pulleys. I resorted to ABS printing my XL pulby davew_tx - General
So, I bought 50 drill bits on ebay for about $18? US. Mine are .4mm, but should the same for other diameters. They have a 1/8" shank, making it easy to chuck up in dremel or a lathe. I have had great success in brass and copper. Not any success in steel or SS. I have succeeded both by spinning the bit or spinning the work. Head and tailstock center alignment on the lathe (Taig micro) is essby davew_tx - General