#1
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Welding Table Legs - Othello, USA
Copied from elsewhere:
I started my build last weekend, this will be a monster when it's complete. I got most the electrical figured out except the transformer.Looking at pictures and all the different drawings it would be nice just to get a part number and supplier and be done. Dan |
#2
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Dan,
The transformer choice depends on which Stepper Motors you are using. I used the Antek transformer and built my own power supply because I needed two voltages(two different Stepper Motors). If you are going with a pre-built power supply(not building your own), just tell us what Stepper Motors you are using, and we can give you some suggestions for part numbers. |
#3
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John,
Did you use different size motors for the Z & Y . I was looking at th Oriental motor # PK296A2A as recommended |
#4
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I got the v groove bearings today,and went over the plasma cut parts with a friend of mine.This weekend lots of stuff should come together
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#5
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Dan,
I used 3 USED OM motors, 1A1 with 3.6 gears. I used one NEW PK296A2A-SG7.2. I put the PK296A2A-SG7.2 on the Y-Car. The others for the rest. Your selection of PK296A2A motors is an excellent one and this is what I would have used had I not got the chance to buy 3 USED OM motors, cheap. Many MechMate builders have used the PK296A2A-SG7.2 motors very successfully. Have you looked at the Antek product offerings? I found them to be very helpful and the products good. They even provided suggestions on a schematic for a dual voltage power supply design. |
#6
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John,
Why is it necessary to cut the angle iron down, I purchased 3x2 angle and couldn't figure out why cut. if the z moves up and down whats it matter. FAQ candidate |
#7
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Haven't looked at power supplies and transformers again. I'm excited about putting all the parts together and pushing it around. I need to study and research motors, transformers,and software a bit before I go blow 2k
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#8
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If the tracks are not cut down to the specified height, the motors will not swing low enough to reach the racks. To make that work you would have to change at least 7 other components to suit the higher track. Higher tracks would also possibly allow more movement/flexing. Trust us there is a reason for everything being as it is...
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#9
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Dan,
Okay, Alan answered the question about cutting down the rails while I was sleeping. Thanks Alan. And regarding... EXACTLY! And also, when you assemble the Control Box and start testing, you will know exactly how it is all supposed to work. If there are problems, you will be in a much better position to troubleshoot them. |
#10
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Thanks guys, I understand. I'm going to try and use my plasma to cut the angle down. Then make a grinding jig. I was wondering how come everyone uses hard stone for grinding instead of a flap disk. Flap disks cut faster and smoother
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#11
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Someone here tried to have the rails cut down with plasma and just ended up with useless warped rails.
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#12
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Heath,
I'm surprised, I'll try on a piece of scrap first and see. Otherwise I will just use a cut off wheel. |
#13
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Plasma Vs. Cut-off wheel
I used the cut-off and the angled skate for the 45 degree cuts and had no problem with either. The cut-off wheel went very quickly and was very accurate (assuming you have a solid, flat base on which to place the sled) and the angle grinding went well once I figured out the need to have the leading edge of the grinding wheel as the contact point. BTW - I angle ground my Z-plate this weekend using the same system - no problems. Hope this helps
Joe |
#14
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Thanks for the help guy's. I'm amazed at how much information is available on this site. I took a 3 day weekend to start putting together all the money I spent. Have to keep telling my wife it's not a toy. Don't think she's convinced. Over the years it's getting harder to convince her.
Dan |
#15
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Hen….lucky you, you still able to convince her a bit..... nooooot here
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#16
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When you start producing things for her, it all falls into place...so just wait until you are making dust.
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#17
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Started welding today. Made first mistake of many to come, Cut the frame out jigged it all then started tacking together. Brainstorm,wondered if a 4x10 sheet of plywood available. Well 50 mile trip to town later and it's a problem to get, Cut the tacks off now it will be cut area of 4x8. I'm sure it's overbuilt but I had some off the material left over from a job. X rails are 3X8x3/16 square tube.
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#18
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Started welding the legs in place today, should be able to flip it over on sunday. While doing some touch grinding I realized that a hard stone will be better to grind the rails. A flap disk will flex a bit and may cause an uneven surface. I was wondering, people talk about gluing the spoil board to the base board. When the spoil board needs to be replaced how do you remove it?
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#19
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The spoil board wears away with time. When it gets grubby, you take a light cut over the whole surface (called "re-surface" or "surfacing") and so it gets even thinner. When you get near to the old glue line, you re-surface and glue the next one on top.
(FAQ candidate) |
#20
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Legs are on, so far everything is holding square
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#21
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Re: the Spoilboard - Has anyone tried using the same double sided tape used for the racks to hold down the base board onto the cross rails? Would this work? (Assuming the cross rails are welded for stiffness rather than bolted) Just a thought
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#22
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I think it will work well if you can get a good bond between the tape and the board.
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#23
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The table construction is complete. Just waiting for the formed parts then will start on the gantry Y car. I want to order the PC this month. Does anyone have any recommendations?
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#24
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I bought a used Small Form Factor PC from these guys.
It came with XP Pro and was ready to run. In addition to the price of the machine I paid shipping and taxes (they are located in Texas) for a total of $114. It arrived a couple of days after I placed the order. The computer is shown in this post from my build thread. |
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