Post by: Appalachian Hillbilly on October 27, 2022, 01:55:36 PM
One piece longbows are on the menu so that means a new oven. Batting around several ideas. Incorporate it into a new workbench with an under the bench design. Over the workbench and use the bottom of the oven to have brackets and hangers for my common used tools and a work light or an upright oven to put in the corner.
Either design will be well insulated and designed to make use as easy as possible. Drawer slides and racks if needed etc.
Looking for alternative heat sources such as base board heater etc to make space more usable.
Ken
Post by: Roy from Pa on October 27, 2022, 04:36:39 PM
Post by: Stagmitis on October 27, 2022, 05:03:21 PM
Post by: Roy from Pa on October 27, 2022, 05:15:14 PM
Post by: OldRawhide42 on October 27, 2022, 07:20:47 PM
Post by: kennym on October 28, 2022, 08:05:22 AM
The floor models are a pain to get the form in and out of.
Post by: Mad Max on October 28, 2022, 08:10:00 AM
(https://i.imgur.com/oS0CQ5s.jpg)
Here it is with it open and I do all my glue up's here, plenty of room to lay out all the lams.
(https://i.imgur.com/XaZ9DJJ.jpg)
(https://i.imgur.com/2nrpeQ7.jpg)
Post by: Buggs on October 28, 2022, 09:18:30 AM
If I were to build another, I would laminate rigid foil faced rock wool panels onto 1/8" plywood and make it knockdown unit. A modified baseboard heat element or circulating hot air blower for heat.
Post by: Appalachian Hillbilly on October 28, 2022, 12:07:35 PM
Got a little money from another job to spend on this, so I want to do it nice.
Post by: Kirkll on October 28, 2022, 08:17:38 PM
If i had to do it again i think i'd just use a couple 500 watt halogen light fixtures and possibly a small squirrel cage fan for heat circulation. cost effective me thinks.... Kirk
Post by: Stagmitis on October 29, 2022, 09:59:11 AM
https://www.amazon.com/dp/B08J7Y1T2S/ref=sspa_dk_detail_5?psc=1&pd_rd_i=B08J7Y1T2S&pd_rd_w=WtNsz&content-id=amzn1.sym.46bad5f6-1f0a-4167-9a8b-c8a82fa48a54&pf_rd_p=46bad5f6-1f0a-4167-9a8b-c8a82fa48a54&pf_rd_r=7H0PB6EAQK35RX34C62Y&pd_rd_wg=k1fOe&pd_rd_r=7b3bc4d7-6a55-4353-b047-5c070b2f471f&s=lawn-garden&sp_csd=d2lkZ2V0TmFtZT1zcF9kZXRhaWw&smid=A1EXXUJBXBLFR9
Pros,cons what do you all think?
Post by: Buggs on October 29, 2022, 10:05:16 AM
Thats a lot of wasted shop space, space to heat and materials. For a bow sized box, 100watts of halogen puck lights is enough, or 300watts of baseboard element. They are both low profile options.
A fan is a very efficient addition. Anybody who has cooked in a convection oven, knows how hot and fast they work compared to a standard oven. A little 4" fan will supercharge your box.
That heater is probably not the best choice. It's radiant, which is not for space heating and its got a big footprint for only 140watts.
Post by: Stagmitis on October 29, 2022, 01:38:23 PM
Post by: Kirkll on October 29, 2022, 09:08:26 PM
I'd like to build a small box with a couple 100 watt bulbs to heat my boat in winter storage when it gets real cold.
Kirk
Post by: Appalachian Hillbilly on October 30, 2022, 07:14:35 AM
https://www.amazon.com/Ceramic-Emitter-Infrared-Reptile-Chicken/dp/B09KQS82LW/ref=asc_df_B09KQS82LW/?tag=hyprod-20&linkCode=df0&hvadid=563772978164&hvpos=&hvnetw=g&hvrand=15128292842818892692&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9010321&hvtargid=pla-1594467267482&psc=1#
Post by: Buggs on October 30, 2022, 09:08:39 AM
The great thing about these lights is that they, like incandescents are also very inefficient and put out a lot of heat.
And they are cheap! And they come with little parabolic dishes! Four 25watt pucks easily match 300-400watts of space hog bulbs. Just make sure to get ones with metal housings, I melted some plastic ones. They run on DC and have a mini inline transformer, so they are typically plug and play.
Hillbilly, something to consider if you are upgrading to an Inkbird controller. The PID will cycle on and off hundreds of times , maybe more, during a multi hour cure. Thats a lot of stress on a light emitting filament. Baseboard element would hold up better in that environment.
Post by: Kirkll on October 30, 2022, 11:44:55 AM
I’ve seen them with dimmer switches too.
https://www.amazon.com/DORESshop-Dimmable-Lifetime-Landscape-Chandeliers/dp/B09LQYYWBL/ref=sr_1_26_sspa?crid=UFAWAB5KPTFY&keywords=halogen+puck+lights&qid=1667144413&qu=eyJxc2MiOiI1LjAwIiwicXNhIjoiNC4xNyIsInFzcCI6IjMuNjMifQ%3D%3D&s=hi&sprefix=Halogen+light+pucks%2Ctools%2C160&sr=1-26-spons&psc=1
So are you saying that the off/on cycling used in a hot box with a temp controller is hard on these halogen bulbs? How is it any different than an incandescent bulb?
Post by: Buggs on October 30, 2022, 05:44:19 PM
Post by: Kirkll on October 30, 2022, 08:38:24 PM
I'm going to order a couple of these halogen pucks and try them out in my spray booth and see how they compare to the 150 watt incandescent bulbs. I really like the low profile fixtures.
Kirk
https://www.amazon.com/gp/product/B001ET6DAC/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
Post by: Appalachian Hillbilly on October 31, 2022, 07:18:38 AM
It does not rapidly cycle them at all. You can program the delta T and how much you want it to swing. You can even program it to do it in steps. I have it paired with a timer as well.
I also use heat 300 water heat lamps and not lights. You get more heat than light.
A baseboard would be compact but may not be as responsive as pucks or lamps.
It has a timer function but I do not want it to repeat every day . They are worth every dime.
If there is no hysteresis in the circuit , you can get the rapid cycling. I also have mine insulated pretty good.
Post by: Buggs on October 31, 2022, 09:12:57 AM
I don't get rapid cycling, but it does cycle on and off a lot modulating temp.
Does your controller have ramp/soak function?
Post by: Appalachian Hillbilly on October 31, 2022, 12:25:23 PM
https://www.amazon.com/Inkbird-Electronic-Temperature-Germination-Controlling/dp/B01486LZ50/ref=sxts_rp_s_a_sp_1_0?adgrpid=58602327720&content-id=amzn1.sym.e1d0fd65-dbff-454d-9e35-926f4c285911%3Aamzn1.sym.e1d0fd65-dbff-454d-9e35-926f4c285911&cv_ct_cx=inkbird+temperature+controller&gclid=CjwKCAjw5P2aBhAlEiwAAdY7dFRxbsaoQ28gzIJkEy3G-gpHjFllCmqC6OVvX_0YH-PE5vo1Qn_UHhoCFZwQAvD_BwE&hvadid=583866772541&hvdev=m&hvlocphy=9010321&hvnetw=g&hvqmt=b&hvrand=18179376325249153990&hvtargid=kwd-299623784374&hydadcr=955_1014988408&keywords=inkbird+temperature+controller&pd_rd_i=B01486LZ50&pd_rd_r=9448594c-adb7-4f04-b781-e473c1abd70f&pd_rd_w=vWZj4&pd_rd_wg=5HbVq&pf_rd_p=e1d0fd65-dbff-454d-9e35-926f4c285911&pf_rd_r=Y55P76QJNV4HJACQ8313&psc=1&qid=1667232515&qu=eyJxc2MiOiIzLjIyIiwicXNhIjoiMi44OSIsInFzcCI6IjIuNzMifQ%3D%3D&sr=1-1-3a65484d-1c95-4bed-b564-9469fdeef107
. Not your old school PID controller where you had access to all the parameters. I used to use Auburn PID controllers on my powder coat ovens I built.
These are much easier since we are not actually measuring the temp of the bow and controlling off that. We are just measuring free air temp and holding it.
I generally set a 5 degree swing and it does not cycle excessively.
Post by: Buggs on October 31, 2022, 07:51:13 PM
Post by: Appalachian Hillbilly on November 01, 2022, 08:21:19 AM
You just have to find one with 120v control side
Post by: Buggs on November 01, 2022, 11:32:59 AM
Post by: Appalachian Hillbilly on November 01, 2022, 08:48:06 PM
The other PID controllers I used had either 10 amp dry contacts or a low amperage 120 out put to run switches, alarms, contractors etc.
Post by: Buggs on November 03, 2022, 10:32:59 AM
I' using a 18" element, rated at 300w, which is way more than enough for 10cuft of heat box.
Circulation fan is the key ingredient.
Post by: OldRawhide42 on November 03, 2022, 12:08:38 PM
Post by: mmattockx on November 03, 2022, 05:23:23 PM
I had no idea you could run 220v off a 120v temp controller.
If I'm understanding AH correctly, he is just suggesting using the controller to trigger a relay that actually handles the power to the heating element. All you would need for that is a relay that will take a 120V signal and handle 220V and whatever amps you need for the element.
Mark
Post by: Roy from Pa on November 03, 2022, 05:45:59 PM
Post by: Appalachian Hillbilly on November 04, 2022, 08:54:49 AM
If anyone has specific questions, pm me. This is part of what I do for a living. We have a bunch of extrusion coating and use a ton of heating elements.
Ken
Post by: Roy from Pa on November 04, 2022, 09:16:55 AM
I run them off a thermostat which picks the 110 volt relay and that supplies the 220 volts to the baseboard heaters.
That is when I don't have the wood burner cranking.
Post by: Kirkll on November 04, 2022, 10:32:46 AM
I have 220 volt baseboard heaters in my shop.
I run them off a thermostat which picks the 110 volt relay and that supplies the 220 volts to the baseboard heaters.
That is when I don't have the wood burner cranking.
How big is your shop Roy? I can’t imagine using baseboard heaters as being the most cost effective heat source. But…. If you have a wood stove I can see it.
I got rid of my wood stove in my shop and went to a propane heater. It’s more cost effective, and a lot less work than muscling wood. I was burning 4-5 cords a year heating with wood. But…. I’ve got a big uninsulated area to heat. My work area is 24x36 in summer, but I use arctic curtains in winter heating 24x24 with 10’ ceilings. (The green plastic is seriously heavy stuff.)
This is what I put in my shop.
https://photos.app.goo.gl/HvMaPEQbNVckF599A
Post by: Stagmitis on November 10, 2022, 05:52:22 PM
Post by: Roy from Pa on November 11, 2022, 05:39:53 AM
However I have a wood stove also that I use as my main heat, and I need to be careful with it cause it will chase you out. More than once I've had the windows and door open to cool things down.