Recent content by rusirius

Glad you're getting better results! As for the pwm, I've actually just completed a bunch of testing and found something quite interesting. If I run the pwm to the driver direct the image reproduced is very accurate, however it doesn't produce the best results. I built an rc filter with...

Are you stating this based on the nozzle or the mechanics? The reason I ask is, I've just finished building acnc machine which uses nema17 motors and gt2 belts. I've used a dial indicator to measure it's resolution. It moves on all axes .006mm per step, and even after repeated movements in all...

I too use the WESD51. I've had it for a long time and it's been a workhorse. I wouldn't think twice about another one. Mine is slightly different. It looks like this. (Older model maybe?) http://m.ebay.com/itm/221675964437

Also Joe, What wood are you using? I've been using mostly poplar though I've found birch plywood to also be a great choice. Both are very light and take an image well. You also want to make sure to sand the surface (I usually start with 320 in an orbital and follow that with 600). You...

Sure Joe, let me see what I can do to help you out... :) As for the driver, the meter I'm using is this model here: Clicky Clicky I have it "inline" with the laser diode itself. On my openbuilds page (or I think in this thread too) I posted a diagram that shows a rough schematic, that will...

It was actually rather complex. A lot of structures had to be changed, the extra setup option, bypassing of the normal spindle_run function when encountered during a linear or arc based move, and finally the change to pwm during the ISR timer firing (stepper timer). I've also made quite a few...

Thanks Joe! I'm getting there but it's definitely still a work in progress. My most recent discovery is that my revised grbl code had a weird anomaly which resulted in the image losing definition (i.e. pixels getting more and more "blurry" as my feed rate increased. After thinking about it...

Just wanted to throw out a quick update. I've been pretty jammed up lately and haven't had much of a chance. I had to re-code a bit of grbl. To make a long story short, I was maxing out at about 400mm/minute no matter what feed rate I requested. Come to find out, when grbl gets a spindle...

I purchased direct from openbuilds and got the v2, I don't think they've officially released it, but it's out there. I know what you mean, I've used paste and my trusty toaster oven a few times. Acceptable work but not exactly wave flowed. :) It's amazing how small some of the smt stuff is...

I spoke to the guy when I inadvertently destroyed mine. He's been selling them for some time now and didn't doing like he intended to stop. Probably just working on another batch.

Sure Joe, here's a link: 3A Analog Laser Diode Driver with Thermal Protection for 445nm 638nm 520nm Diode | eBay

To be honest, if there is I've never run across anything like it. Generally buttons fall into two categories... Toggle or momentary. But a momentary will stay in it's state until released. I think the biggest reason for this is if you're looking to get a "pulse" out of it, the timing of that...

You're looking for something like a piezo-pulse momentary then? Basically it's a piezo-electric element (think the "clicker" in a lighter, bbq grill, etc) that the electrical output drives a small "relay" that closes... Basically you push it, it "clicks" (no real click as these usually don't...

Joe, If you take a look at my other thread there is a rough schematic there. I went through several variations of designs to try to figure out what to do but in the end the most simple design I had seems to work flawlessly. And that was to simply use an analog modulated driver but drive...

BTW, someone had asked me about costs... I finally posted a parts list. This is just for the laser portion itself, not the spindle or extruder since I haven't got that far yet. The openbuilds order would be $580... Most everything else I had, but just giving a quick look I'd guess about $150...