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General Upholstery Questions and Comments => General Discussion => Topic started by: scarab29 on July 27, 2016, 08:32:05 AM

Title: Welt help ! First time sewing sunbrella furniture fabric .
Post by: scarab29 on July 27, 2016, 08:32:05 AM
I am having a issue where the welt I have sewn is coming out all wavy ( see pic ). Can't figure out what I'm doing wrong . Using the same 1/4 welt cord I use on everything else and have never had this issue even using the boardy marine sunbrella . This fabric is very expensive and i'm freaking out !! Pushed it to the side for a couple days and figured I'd ask the masses here . Thanks for looking !

https://drive.google.com/open?id=0B6r5R47xqSPqbEh3ZExVWjFFNWc
Title: Re: Welt help ! First time sewing sunbrella furniture fabric .
Post by: sofadoc on July 27, 2016, 11:44:28 AM
Need more info, so I'm just going to throw out several basic questions. Some may apply, some may not.

1. Did you cut the welt strips on the bias, or straight?
2. Did you make snips in the welt as you sewed it on?
3. Fiber welt or vinyl?
4. Is the wavyness only on the curved edge of the cushion, or along the straight runs as well?
5. Did you sew the welt separately first, and then sew it on the panel? Or did you sew the welt to the panel all in one pass?
6. I assume that you sewed this on a machine that you normally sew on with no previous problems?

Answers to these questions might help us make a better assessment. Please don't be insulted by them. Sometimes, you have to ask all the basic stuff first.

I think Paul does a lot of Sunbrella stuff. He'll probably have some good suggestions.     
Title: Re: Welt help ! First time sewing sunbrella furniture fabric .
Post by: scarab29 on July 27, 2016, 01:01:08 PM
1 straight cut
2 on sharp turns
3 foam welt cord
4 waves all over , straight runs and curves
5 welt sewn to plate then boxing sewn on
6 All good with the vinyl cushions I made yesterday for a viking .

Thought it may have to do with the welt cord and the soft hand fabric to be honest .

Thanks
Title: Re: Welt help ! First time sewing sunbrella furniture fabric .
Post by: sofadoc on July 27, 2016, 01:38:30 PM
Yeah, I think foam welt expands or contracts a little after you sew it in, causing the waviness with soft fabrics.
Title: Re: Welt help ! First time sewing sunbrella furniture fabric .
Post by: scarab29 on July 27, 2016, 04:59:02 PM
Yeah, I think foam welt expands or contracts a little after you sew it in, causing the waviness with soft fabrics.

I think I answered my own question as I looked at the different types of welt cord on the upholster.com site and found this note for the jute cord and the foam cord .
Foam Flex Welt Cord is also good for outdoors. Again cut the fabric on the bias to prevent wavy cording.
5/32" 500yds.

Jute welt cord is great for sewing outdoor furniture cushions. Wasahble. Cut the fabric on the bias and pull tight while sewing to prevent wavy cording.
Title: Re: Welt help ! First time sewing sunbrella furniture fabric .
Post by: MinUph on July 27, 2016, 06:17:05 PM
Sounds like your getting a handle on the issues. Welt cord, stretch, etc. Keep up posted and we will work through this. Cushion grade sunbrella can be a bear to sew.
Title: Re: Welt help ! First time sewing sunbrella furniture fabric .
Post by: sofadoc on July 27, 2016, 08:16:41 PM
Hey Paul. I recall that you bought a new machine recently for the purpose of handling Sunbrella better. How's it working out?
Title: Re: Welt help ! First time sewing sunbrella furniture fabric .
Post by: MinUph on July 28, 2016, 04:44:17 AM
The new machine is a nightmare. It is a Consew 1541. It breaks thread, jumps timing, etc. I made the mistake of buying it from the guy in California, and while he is helpful on the phone we haven't gotten all the bugs out yet. And havent had a sunbrella job since the new machine.
Title: Re: Welt help ! First time sewing sunbrella furniture fabric .
Post by: Grebo on July 28, 2016, 05:33:44 AM
Iv'e not had issues with the soft fabric other than the fraying, for which I use an serger.
I use fibre welt cord & always cut on the bias.

Suzi
Title: Re: Welt help ! First time sewing sunbrella furniture fabric .
Post by: Darren Henry on July 28, 2016, 06:28:07 AM
Quote
Sometimes, you have to ask all the basic stuff first.

If , for no other reason, for the benefit of those less experienced who are only quietly reading in the background.
Title: Re: Welt help ! First time sewing sunbrella furniture fabric .
Post by: sofadoc on July 28, 2016, 07:35:46 AM
The new machine is a nightmare. It is a Consew 1541. It breaks thread, jumps timing, etc. I made the mistake of buying it from the guy in California, and while he is helpful on the phone we haven't gotten all the bugs out yet. And havent had a sunbrella job since the new machine.
If you're talking about Zamir, I've heard several horror stories from others that bought from him. He's usually got his machines priced a little cheaper than anyone else, and some report receiving a brand new machine that is good to go.

But others have experiences similar to yours. It doesn't sew right when they get it, and they just get jerked around over the phone. The only option is to hire a local mechanic to fix it, at which point any savings is negated by the mechanics fee.

I was looking at that model on Consew's website. I notice that it has a round knob on the upper right side of the head that is identified as "Climbing device". What does that do?

There's a lot that I don't understand about the industrial sewing machine industry. Juki has made the 1541 model for years. And now Consew makes one. That's like Chevy coming out with their own Mustang.
Title: Re: Welt help ! First time sewing sunbrella furniture fabric .
Post by: gene on July 28, 2016, 08:23:06 AM
Quote
Iv'e not had issues with the soft fabric other than the fraying, for which I use an serger.

I saw a video where the guy suggested that instead of buying an expensive hot gun to cut the fabric you could use a soldering gun and run it around the cut edges to stop it from fraying.

Has anyone tried this? I'm not sure if it would be faster than serging.

gene
Title: Re: Welt help ! First time sewing sunbrella furniture fabric .
Post by: brmax on July 28, 2016, 09:19:17 AM
I have had a soldering iron for awhile, though it was used for electric work a lot. I really just smartly learned of its use for other stuff, then I felt like I needed a v8 bonk. It was here I learned of this new use and of course depending on the model the available parts. I guess it didn't sink in as that wasn't the first need I had for it and as we all are busy forgetting some other uses! oh well.
http://flitetest.com/articles/soldering-gun-hot-knife-quick-tip

I remember way back when another had a 1541 with the top knob, as I remember its like adjusting what many call the lift in the slotted part on the back or inside the back cover, banana shaped.
It seems pretty darn cool I think, but I possibly could use correcting on that.
It was a neat item all the while I was looking around but only top dollar got that option.

Great tips on the welt, so I'm picking up if using textiles try to cut on the bias. When working on outdoor cushions jute can be used, and may be best choice?

have a good day
Floyd
Title: Re: Welt help ! First time sewing sunbrella furniture fabric .
Post by: kodydog on July 28, 2016, 11:26:03 AM
I was having the same problem with raveling on an outdoor slip cover made with Sunbrella. The owner was planning on washing it once a year and I knew that would be a problem.  Our serger has been on the blink and because its a light weight machine and we rarely use it anyway we have not gotten around to fixing it. So I took the advice of the folks on this page and tried the soldering iron. And it did a good job of melting the edge of the seam. But slower than (I assume) a hot knife and slower than a serger. When I showed the owner he thought I was a genius. Thanks for making me look good y'all.
Title: Re: Welt help ! First time sewing sunbrella furniture fabric .
Post by: kodydog on July 28, 2016, 11:37:49 AM
As far as the wavy cording. It looks like the top panel is cut on the bias which will make it very stretchy. This makes it real easy to stretch the top panel as your sewing along. Even when you do your best not to and especially if the cord is cut straight.
Title: Re: Welt help ! First time sewing sunbrella furniture fabric .
Post by: MinUph on July 28, 2016, 02:01:08 PM
The new machine is a nightmare. It is a Consew 1541. It breaks thread, jumps timing, etc. I made the mistake of buying it from the guy in California, and while he is helpful on the phone we haven't gotten all the bugs out yet. And havent had a sunbrella job since the new machine.
If you're talking about Zamir, I've heard several horror stories from others that bought from him. He's usually got his machines priced a little cheaper than anyone else, and some report receiving a brand new machine that is good to go.

But others have experiences similar to yours. It doesn't sew right when they get it, and they just get jerked around over the phone. The only option is to hire a local mechanic to fix it, at which point any savings is negated by the mechanics fee.

I was looking at that model on Consew's website. I notice that it has a round knob on the upper right side of the head that is identified as "Climbing device". What does that do?

There's a lot that I don't understand about the industrial sewing machine industry. Juki has made the 1541 model for years. And now Consew makes one. That's like Chevy coming out with their own Mustang.

Dennis I moved this to a private message to stop hijacking this thread.
Title: Re: Welt help ! First time sewing sunbrella furniture fabric .
Post by: Mojo on July 29, 2016, 05:22:45 AM
One of the very first awnings I made I used a soldering iron to cut the edges. It didn't take long for me to realize I needed a hot knife. Much faster and cleaner cut.

The headaches new machines can cause is just not worth trying to save $ 100. It is why I buy all my machines from Bob Kovar. I have shipped him my thread and fabric and he has set up new machines according to how we use them. Every machine I have bought from him came out of the box and went to work with no adjustments needed.

The problem with buying from a lot of these people on the internet is they do not do sew offs. Many never even see your machine and just have them drop shipped. Bob was telling me that the manufacturers are notorious for shoving machines off the factory floor that need adjustment and in some cases new parts. That is why he sews off every machine before shipping.

I can pretty much fix anything on a machine but prefer not to do it if I am buying new. The extra $ 100 I pay to Bob is worth it as I know the machine will be delivered without any issues. Most of these e-bay sellers and a few other companies are nothing more then drop shippers or distributors.

Chris
Title: Re: Welt help ! First time sewing sunbrella furniture fabric .
Post by: Darren Henry on July 29, 2016, 07:22:18 PM
(http://i40.photobucket.com/albums/e216/djh_64/th_heatcutter.jpg) (http://s40.photobucket.com/user/djh_64/media/heatcutter.jpg.html)

If you are referring to our thread from a  few years ago about hot knives--- what I said was that soldering tips were not the answer but that I couldn't justify $160 for a 90 watt power source for their blades/foot, when I had a 120 watt power source that I paid <$20 bucks for. BTW I am still cutting all my sunbrella and webbing with this same rig.
Title: Re: Welt help ! First time sewing sunbrella furniture fabric .
Post by: Grebo on August 01, 2016, 04:50:36 AM
Quote
Iv'e not had issues with the soft fabric other than the fraying, for which I use an serger.

I saw a video where the guy suggested that instead of buying an expensive hot gun to cut the fabric you could use a soldering gun and run it around the cut edges to stop it from fraying.

Has anyone tried this? I'm not sure if it would be faster than serging.

gene

Hot knife works great on the regular sunbrella but I found the upholstery / cushion grade doesn't like it. Could be more cotton in the mix I can't remember, hence the serger ( looks neat as well ) failing that I would turn the edge, more work but neater end product that won't fray. Not used a soldering iron but also heard it works as good as a hot knife.
Title: Re: Welt help ! First time sewing sunbrella furniture fabric .
Post by: BlueFlamingo on August 01, 2016, 08:40:34 PM
I use an Old Weller soldering gun and Made my own "Knife" Attachment out of 10guage solid copper wire.   Used a hammer to flatten about 1 1/2" section and then bent to shape.  It Works GREAT!!! Gets HOT within seconds and since it has a 1 1/2" cutting edge I can accurately cut any suitable fabric.  The Weller Gun cost me $20 bucks on Ebay.