Max's Build - a comedy of errors.

Max Metz
Posts: 240
Joined: Sun May 20, 2012 11:55 am

Re: Max's Build - a comedy of errors.

Post by Max Metz » Thu Sep 06, 2012 4:43 pm

Starting to put stuff together, here is where I got to tonight, using spring washers between flat washers to stop the twist when tightening the bolts that hold the motor and end plates to the Makerslide. This works very well with the machine now feeling very rigid and the v wheels hit the end plates at the same time on either side and stay that way. There is still some play in the y axis as others have commented, though the twin drive on the y axis should take up the minimal amount left.

I still have to fit the optical sensor brackets to the right y axis motor plate before starting on the x axis motor plate.
2012-09-07_00-22-46_294.jpg
2012-09-07_00-22-46_294.jpg (411.44 KiB) Viewed 1447 times
After posting the bracket plan I realized I had omitted one drag chain bracket and a belt hole in another bracket. Here is the amended drawing, the changes are complete with all brackets finished (again lol).
+brackets 001 revision A 2 brackets.jpg
+brackets 001 revision A 2 brackets.jpg (26.47 KiB) Viewed 1447 times
Enjoy the day. :D

nogthree
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Location: Brisbane, Australia
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Re: Max's Build - a comedy of errors.

Post by nogthree » Thu Sep 06, 2012 11:52 pm

Nice work Max! Reminds me that I really need to post my upgraded beast's buildlog.

Posting to subscribe to replies :)
- Brendan Halliday.
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Max Metz
Posts: 240
Joined: Sun May 20, 2012 11:55 am

Re: Max's Build - a comedy of errors.

Post by Max Metz » Fri Sep 07, 2012 2:09 pm

Thanks mate. :D

Max Metz
Posts: 240
Joined: Sun May 20, 2012 11:55 am

Re: Max's Build - a comedy of errors.

Post by Max Metz » Mon Sep 10, 2012 2:24 pm

More bracket revisions as the optical sensor brackets were too close to the ends of the run and the tolerance far too fine when trying to fit in nuts and washers. Two new small plates are also included for the bottom of the motors to match the depth of the top brackets that hold the drag chain.
+brackets 001 revision B XY sensor brackets.jpg
+brackets 001 revision B XY sensor brackets.jpg (62.85 KiB) Viewed 1390 times
The machine is mechanically complete except for the extra Y axis motor which has not arrived as yet, so its on to the electronics and electrical next. :D
2012-09-10_21-36-33_137.jpg
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Added a piece of 18mm diameter fine gauge steel tube to the back to increase the rigidity, 5mm threaded rod running through it, posted how this was done on the 'design ideas' forum. The bottom x axis v wheel bolt heads just run clear of it... lucky! lol - the tube doesn't make for totally rigid though it does improve things. All the best. :D

Max Metz
Posts: 240
Joined: Sun May 20, 2012 11:55 am

Re: Max's Build - a comedy of errors.

Post by Max Metz » Mon Sep 10, 2012 4:11 pm

Forgot to mention, the little electronics stand fits nicely over the power supply with the safety stop switch hooking into the recess on the side - putting something similar on the other side to clip in will make quite a neat electronics set-up. :D
2012-09-11_00-01-05_276.jpg
2012-09-11_00-01-05_276.jpg (362.82 KiB) Viewed 1385 times

Tom Smith
Posts: 297
Joined: Mon Apr 09, 2012 9:55 pm
Location: North Vancouver, British Columbia

Re: Max's Build - a comedy of errors.

Post by Tom Smith » Mon Sep 10, 2012 8:04 pm

Looks pretty cool, Max - it's almost like you built a completely different machine. I need to go back to some of your drawings to figure out a couple of the pieces though - the motor mounts are custom, are they not? (specifically, the Y-mount). Nice to see the conceptual drawings realized, in any case.

Tom
_______________
ShapeOko1 191

Max Metz
Posts: 240
Joined: Sun May 20, 2012 11:55 am

Re: Max's Build - a comedy of errors.

Post by Max Metz » Wed Sep 12, 2012 2:27 pm

Thanks Tom.

The y axis motor mounts are just 25mm long 3mm brass stand off's - they look different because they have a bracket for the drag chain fitted to them.

I fitted the optical sensors tonight and have ended up with a maze of wire - it will all consolidate down, I need to buy some extra cable and connector blocks... getting closer now. All the best mate. :D

jsbannis
Posts: 80
Joined: Tue Apr 10, 2012 11:09 pm
Location: Chicago, IL

Re: Max's Build - a comedy of errors.

Post by jsbannis » Thu Sep 13, 2012 1:20 am

Max your brackets are awesome! I've been wondering how I would mount limit switches and the drag chain I just got in the mail. Would you mind posting the design (sketchup I think?) file? I'm interested in trying to cut them out on the 'oko. Are your motors nema 17?
shapeoko #0057

Max Metz
Posts: 240
Joined: Sun May 20, 2012 11:55 am

Re: Max's Build - a comedy of errors.

Post by Max Metz » Thu Sep 13, 2012 5:13 am

Thanks jsbannis..

I'd be honoured if you used my brackets or anything else I have included and yes I am using the standard full kit nema 17 motors. When I have the whole thing up and running I will post the full Sketchup drawing on Trimble warehouse for anyone to use. Best regards mate. :-)

Max Metz
Posts: 240
Joined: Sun May 20, 2012 11:55 am

Re: Max's Build - a comedy of errors.

Post by Max Metz » Mon Sep 17, 2012 3:17 pm

Shapeoko 566 lives.

Well sort of, the fan on the power supply doesn't come on and I had some issue initially getting any decent voltage out of the power supply, I have emailed Inventables.

With all the extending of the axis travel and the single idler belt mod the belt wan't long enough on the x and y, I bought some spare belt so not an issue - however so as not to waste the belt I put a metal eyelet either end and will tension it as planned but with a single nylon tie running through the eyelet, through the belt hole in the end bracket and finally around the steel retaining bar. In this way the nylon tie becomes part of the 'dead length' the belt has to run through the air and the belts don't actually touch either end of the machine.
2012-09-17_23-24-11_937.jpg
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The steel bars are sawn to length from a couple of large nails.

My z axis is running perfectly, I put some wd40 on the thread and added 4 3mm washers (1mm thick) to each z axis motor support to increase the gap between the 8mm threaded drive rod and motor shaft in order to give the flexible coupling a better chance to do its job - this works great.

After installing the Arduino drivers manually in windows the g-code sender worked like a charm, I exercised the z axis with it. The x and y axis turn, though the pulleys slip on the spindle so I will re thread the lock hole on these pulleys to 3mm so they secure tightly using a larger more standard allen key - I should have known this would an issue as I had a difficult time getting the supplied allen key to grip the pulley worm screws properly.

Still waiting for my extra Y axis motor to arrive.

Rather than solder the sensor wires to the Arduino I bought a $17 terminal shield that fits between the Arduino and the grbl shield.
2012-09-17_23-25-16_844.jpg
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As you can see the wiring with the sensors fitted became much more complex so I colour coded the electrical's with shrink sleeve.
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:D

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