Military Armed Reconaissance Combat (MARC) ROBOT

Alright, I drew out the panels on black lexan I bought from lynxmotion last year which was left over from my last project. The body is 3 6/8 " high by 8" wide and 12" long. With the tracks the width will be 14" wide. Im hoping to get the panels cut tomorrow and order the rest of the lexan I need then as well.

A table saw?

A table saw will not work cutting lexan! I just did an experiment with a piece of scrap lexan and the chop saw (same as a table saw’s speed) shattered the lexan.

Italianguy_299,

I had no trouble cutting Lynxmotion Lexan on my table saw.

You just have to make sure to put sufficient downward pressure on the front end of the Lexan to keep it from riding up on the saw blade.

Regards,
TCIII

I dont have a 300 table saw. Im going to buy a bandsaw for 130 sometime this week.

You were using your saw backwards then. The blade spins towards you so the material is pulled down towards the table. Same as a miter saw or circular saw. If your blade was spinning away from you and lifting your material you stand a good chance of either losing your fingers or shooting the material across the room.

ohhhhhhhhhhhhhhhhhh :open_mouth: :open_mouth:

I wouldn’t take any chances if i were you :frowning:

Im not. :wink:

You shjould use a non-ferous metals blade. These have a negative rake on the teeth so it won’t grab the material and break it. They more scrape than cut.

Deffinately had some setbacks these past weeks. :angry: So far the chassis is 80% complete. Why isnt complete you say? Becuase a lot of the work involved grinding and cutting the metal “L” channels repeated to get a nice clean and smooth look as well as to fit perfectly. so far only 2 motor holes have been drilled in and im still needing to add the holes to mount the motor directly to the lexan polycarbonate.

The **major **setback is that I lost 2 of links to my 3" track set (the larger track set), and now Im going to have to buy an entire set of tracks becuase of this :cry:

There are no real pictures yet, becuse the bot is in rough state at the moment, but will be polished and shined (and hopefully complete) by the end of the month. I already have put almost 50 hours into this project boosting my project a month ahead of shcedule dispite the setbacks.

just be patient as I am, pics, vids and a complete bot will be here…(not soon, but you get the picture) :wink:

Sigh… Joe don’t you know by now we take care of our people? I won’t ship them for free, but if you need to place an order I will throw the two links in for free. I know you’re in Canada, and the shipping is expensive, but it’s the best offer I can manage.

WOA Jim, I know you take care of your customers, but I didn’t expect that!! :open_mouth: I actually will be placing a small order probably within the week, so you can add them to that order.

Thats really cool of you Jim, Cudos to your customer support :smiley:

Just remember to put in the comments section that I agreed to send you 2 x 3" links for free. I’m generous, but I completely reset my entire memory bank every night when my head hits the pillow. lol :open_mouth:

Np. :smiley: Happens to all of us! :wink:

Jim, I just placed an order. The order number is 20651 so you know which package to add the 2 links of the 3" tracks (and the harware to them).

Thanks again. :smiley:

Update: Long Overdue!

Since my package hasn’t been delivered yet (coming Monday) I am working on other parts of the robot to keep me busy. So far I have spray painted the aluminum chassis parts, took off the plastic paper from the lexan and finally assembled the chassis with brand new hardware (the older stuff wasn’t shiny! :stuck_out_tongue: I also cualked all the edges inside the chassis to maintain a water-tight seal for operation in all weather conditions! :imp: :smiling_imp: Than I mounted the motors, Sabertooth and Pan and Tilt…well the modified version of it anyway: lynxmotion.com/images/jpg/wlkstk4l.jpg

I also mounted the ONE track (awaiting for the other two links to complete the other side) and added hex stanodoffs to support the track from sagging in the middle.

Things to do: assemble rightside tracks, attach receivers (notice I used the plural :wink: ) and build clear lexan top. Mount switches and pilot lights, create LED and IR LED vision systems, mount cameras (theres that plural again :stuck_out_tongue: ) and finally add pellot gun/turret and laser pointer, and than I’ve got a hell of a bot! 8)

Note: sorry about the no-pics issue, im still waiting for my digital camera to arrive. I will have loads of picture within the following days of its arrival.

Comments/questions welcome as always.

Joe out.

hmmm, why do these things always happen to me? :confused: My parts came today from UPS. Again, another $85.00 fee, but thats not the problem.

I attached my LM tracks, hooked up my laser6 to the sabertooth, and turned on the bot. I started to get that “jittering” from the robot like I used to get from the scorpion. Is it just me or do all these motor controllers do that? No big deal though, so I began to drive the bot around, and it performed terrible! The tracks made the robot shake sooo much, my camera couldn’t see anything from all the shaking and the awful noise it made from the shaking. I thought the tracks would give me a really smooth ride (thats what I was looking for, I mean cmon, im on tile not gravel). The robot also starts driving around crashing into walls even when im not touching the controls.

I put on my old robot masher tires and the robot runs 10X smoother. Why did I bother with tracks I had no experience with them. And Im still trying to figure out whats up with that stupid motor controller. No one has ever had the same encounters as I have? Must be my luck, becuase everytime I ask around, theres ussually just that theory of “the robot goes into a last command mode” or something. I’m not knocking the tracks or the sabertooth, they seem to be good, im just having major trouble with them :angry:

Any help appreciated :frowning:

well, the track will do that, i have the same issue on hard floor, its because of the sporcket that the track run on, if you were to get a smooth wheel for the bottom idlers, it would run nice and smooth

i would’ve told u, but mines an outdoor bot and the shaking is eliminated on the grass and dirt

yea, i have some issues with the motors too, i think its because my reciviees is around all the metal and it is hard for the signal to get though