Announcement

Collapse
No announcement yet.

Crane for my shop addition

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Portable Welder
    started a topic Crane for my shop addition

    Crane for my shop addition

    I'm going to do an addition onto my existing welding shop, My shop now is 38' x 40' with a 16' ceiling, My addition is going to be 40' x 80' with 18' ceilings.

    My existing cranes are single phase on a hand pulled bridge, but the new cranes are going to have to span approximately 37'-6" which is to big to be pulling up and down the runway.

    Since its alot easier finding used 3 phase powered bridge cranes and next to impossible to find a single phase powered bridge I need to install a phase converter.

    Can I use a static phase converter for the crane ( Which I dont think I can ) or do I have to use a rotary.

    I know that pumps cant run on static phase converters and I would assume a crane would be the same.
    I currently have a static converter for the drill press which has worked great for the last 6 years.

  • metalworksinc
    replied
    Crane for my shop addition

    I farm and have 3phase my grain leg, grain dryer, several augers, and most of my shop tools are all 3phase. I also have 5 3phase ton hoist for sale bought 5 at a farm consignment sale in a crate for 175 bucks. They are all cm hoists it was a good day to buy at the sale, it was raining
    Last edited by metalworksinc; 03-06-2012, 05:41 PM.

    Leave a comment:


  • jackel440
    replied
    I would say to keep an eye on the HGR website.they are an industrial liquidation warehouse. I've bought a few things there.I've seen hoists there all the time.

    Leave a comment:


  • Portable Welder
    replied
    I have got a few prices to go with single phase drive trucks for 2 bridges and it will cost
    $ 11,148.00 so I have re thought my options an will just use a single phase hoist and have 2 run ways so each bridge will be be about 18'-6" which is very easy to pull up and down the run way.
    However I will now need 4 hoist 2 for each bay, I lucked out a year ago and stoled a couple 1/2 ton coffings for $ 250.00 each that will work in the one bay where we wont do much heavy lifting.

    The cost for ( 2 ) 2 ton harrington hoists are about $ 3,000.00 each.

    Leave a comment:


  • DetroitRob
    replied
    Its one of the best features of a VFD, nowadays most are capable of that, and the ones that dont are very large or very cheap models.

    Leave a comment:


  • Brian Oatway
    replied
    Originally posted by DetroitRob View Post
    VFD is my vote, Ive installed quite a few of them. You do have to increase the size of the unit, and not all are capable of doing that either. But it is very cost effective and much easier on the equipment over a phase converter. ABB is good, but expensive. I get all my drive and industrial control products from a company in GA, let me know if you want the info for them, or any help in installing/setting it up!
    They make single phase in 3-phase out VFD's?

    Leave a comment:


  • milkerman
    replied
    Vfd drives

    I get mine from galco industrial electronics in madison heights mi.

    Leave a comment:


  • DetroitRob
    replied
    VFD is my vote, Ive installed quite a few of them. You do have to increase the size of the unit, and not all are capable of doing that either. But it is very cost effective and much easier on the equipment over a phase converter. ABB is good, but expensive. I get all my drive and industrial control products from a company in GA, let me know if you want the info for them, or any help in installing/setting it up!

    Leave a comment:


  • milkerman
    replied
    Motor vfd drive

    Portable
    I would look into a variable frequency drive to power your cranes. As it was brought up in other post there are farms that have three phase but a lot have only single phase. Twenty years ago on the bigger ones with only single phase you would see rotary phase converters, but in the last 15 years we have went to vfd drives to run vacuum pumps,milk pumps water pumps etc. You have to derate the drive for single phase, that means if you have a 5 hp motor you would install a 10 hp drive the drive makes a true 3 phase and has all the protection circuits built into it they are also quiet. Your electrican should be able to find out all the information that you need, for me i only use or recommend only ABB drives as they are the most user friendly

    Duane

    Leave a comment:


  • Don52
    replied
    Originally posted by Portable Welder View Post
    My welder is 3 phase but thats even worse than having to hear a phase converter run.
    I know what you mean -- I have heard noisy rotary phase convertors. American Rotary makes a quiet one. You can have a conversation near it and hardly know that it is running.

    I also don't have three phase power on my street. I live about 1/4 mile from two main roads that both have three phase power. The estimate from the power company was $10K to supply 3 phase from one street and $15K for the other.

    Don

    Leave a comment:


  • Portable Welder
    replied
    I checked on 3 phase when I originally built my shop back in 2004 and its 2 miles away, If I remember they told me it would cost approximately $ 30,000.00 to bring it in.

    It looks like a rotary phase converter is going to be my cheapest way out.

    Leave a comment:


  • metalworksinc
    replied
    I don't know where in the country you live but many farms have three phase so if there is one nearby they might have it so it wouldn't be a big deal to get it

    Leave a comment:


  • towrepairwizard
    replied
    Static convertor

    I have a small shop at my house 30X60 I put a crane in it and used a static convertor the crane works fine but if there is a load on it when you stop it is a little hard on it to restart it. My crane is a 3 ton 5 hp 3 phase I have a small lath and the bridge crane and a milling machine all 3 phase I found me a 7 1/2 hp motor 3 phase and what I do is start the 7 1/2 motor with it not driveing anything with it running I can start up any of my other motors and they start up just fine I also have a 25hp motor on my big lathe the stuff I put in it weights over 2 ton I have a 30hp static convertor. it starts a little hard and it last about 1 1/2 seconds the power company had me put a pole with a meter for my shop but there was problem where they tied in to the power lines there was 2 other houses we were at the end of the line so when I started my lath they would see the dip in power in there houses and there were not to happy with that.so they called the power company [lots of times] what ended up was the power company had to run a new line from the transformer to my meter to stop the dips and was great for me now my dips are less than a second. so this what I did and did not have to get a rotory they are a little priceeee I hope this helps

    Leave a comment:


  • Portable Welder
    replied
    To the first response, Yes I'm out in the country so 3 phase is not an option.

    #2 My welder is 3 phase but thats even worse than having to hear a phase converter run, We use the cranes through out the day.

    #3 I did put a single phase motor on my iron worker and that works because the pump only runs in one direction.
    Because single phase motors only run in one direction while a 3 phase motor can easily be reversed by swithing your T-leads thats easy.

    Harrington Hoist company makes single phase trucks but they want 5,574.00 for them and I need 2 bridges that equal ___________________________ 11,148.00
    and that doesnt include the beam or the hoist or the runway.

    Leave a comment:


  • CharleyL
    replied
    If you can get 3 phase from the power company it's the way to go if there is a strong likelyhood that you will be adding additional 3 phase equipment, but it can be quite expensive to install. If this is to be your only 3 phase device, go with a rotary phase converter. You can use it for more than just the crane if you will only be running one machine at a time, but the phase converter will need to be sized to run the largest machine, so try to consider this and plan ahead when you buy it. You won't need it running full time, only when you need the 3 phase power, so have it wired so that you can easily turn it on and off.

    Charley

    Leave a comment:

Working...
X