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| Ross:
Hello everyone, First off its been while since I've posted I hope everyone is well I've been keeping busy but too busy to write anything up! I started drating a new little project a while back throwing some ideas about and I've got carried away and I've started making it. I'm building a motorised tripod head for panorama and time-lapse photography this is one of my other hobbies. These are available at ranging prices in the hundreds and only really feasible if you are a professional freelancer not a mear apprentice like me. this is the sort of thing I'm replicating in my own way. The results are incredible, see the video below which features a motion control head: Now to the nitty Gritty, I've already got 2 stepper motors and a programable Arduino circuit board coupled with a stepper motor driving unit. have a few avenues for software but I'm going to experiment once I'm up and running as I'm not sure what requirements I'll need. I am using a worm gear and a 57 tooth gear as my drive method with a 200 step motor 1.8 degree per step . Individual steps and micro steps can all be controlled. all holes will have ball bearings. I am currently looking into a laser cutting service for some 10mm perspex, I am awaiting a quote form a company that say they can do it but I am told that the laser will cut at a 'slight' angle. Though this shouldn't be too crucial as I can add a allowance to mill off the sides flat for parts that fit together. here is a screen shot of the parts I am seeking to cut, I have left a few spare just in case.. If anyone has any Laser cutting experiences or companies to recommend I'd be grateful a lot of places have a minimum order value which isn't feasible. I aim to have this finished in the coming months as it really isn't complex mechanically it is the electronics that is the biggest of all learning curves for me. |
| S. Heslop:
How accurate do those things need to be if you're going to mill them flat? You could probably cut them out freehand with an jigsaw (or any saw that'll cut plastic clean), and stick em together with double sided tape for drilling the holes through and milling the edges. |
| Ross:
--- Quote from: S. Heslop on September 04, 2013, 07:18:08 PM ---How accurate do those things need to be if you're going to mill them flat? You could probably cut them out freehand with an jigsaw (or any saw that'll cut plastic clean), and stick em together with double sided tape for drilling the holes through and milling the edges. --- End quote --- I want to keep the milling to a minimum because I have no mill! I should be able to get the sides of the base (one with the circle in the middle) squared up locally if needed. |
| S. Heslop:
--- Quote from: Ross on September 05, 2013, 06:37:41 PM ---I want to keep the milling to a minimum because I have no mill! I should be able to get the sides of the base (one with the circle in the middle) squared up locally if needed. --- End quote --- Ah I didn't realise you didn't have a mill. What's stopping you from just cutting them out free hand and sanding/filing up to scribed lines though? You can acheive pretty fair accuracy doing it that way. You could maybe even print out the pieces from an inkjet printer and glue that onto the plexiglass sheet. Then score through the lines with a razor blade and a straight edge. Those printers tend to be pretty accurate, and might even count as CNC. |
| ddmckee54:
Do you know anybody in your area with a CNC router? 10mm perspex is realatively easy to cut and compared to some of the stuff I've cut on my CNC router, those pieces look dead simple. I'm on the wrong side of the pond or I'd offer to cut them for you. Don |
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