Extrusion Aluminium Based Table for Pick and Place Machine - Page 1
Forum section: electronics / general

author: 48X24X48X
author_rank: Frequent Contributor
timestamp: March 14, 2020, 04:30:34 pm
content: I'm currently asking a Taobao seller to build me an extrusion aluminium based table for a 260 kg desktop pick and place machine (HW-T4SG-50F by HWGC).The Taobao seller is recommending to build the table using 4040 profile. The table dimension is an example table provided by HWGC.My doubt is whether using a 4040 profile is strong enough to hold the weight of 260 kg? And we haven't even add the weight from the feeders itself (about 1 kg per 8 mm CL feeder).I don't have experience with extrusion aluminium, so I thought maybe you guys would give a thought on this.Thanks!

author: olkipukki
author_rank: Frequent Contributor
timestamp: March 15, 2020, 09:25:11 am
content: Quote from: 48X24X48X on March 14, 2020, 04:30:34 pmYou can find some examples, I think smallsmt makes similar tables for own machines.Personally, I would not use this; at least 80x80 (and 80x160 for a cross leg joins) for robustness and stability, and avoid wobbling and shaking.

author: 48X24X48X
author_rank: Frequent Contributor
timestamp: March 16, 2020, 09:37:42 am
content: QuoteYes, I was thinking 40x80 at least but as this guy build aquarium cabinet for a living (some those large ones for shop display), so I thought maybe he knows what he is doing. But, I forgot about the machine inertia when it is moving. I think the SmallSMT ones are sized 40x40 for smaller version and 40x80 for the larger ones but their machine is not that heavy.The table has a 10 mm thickness plate on top of it so the 4 legs will not move away as there will be 4 of 50 mm holes at the corner of the table. The feet of the machine will be removed leaving only some protruding welded nut sized around 50 mm. This is the part that will prevent the machine from moving/slipping on the table. The table has 4 wheel/feet combo.Here's the image of the table drawing based on the sample table dimension. I think the empty space is for the feeder overhang. There will be right angle joints all over it.

author: mairo
author_rank: Unknown
timestamp: March 16, 2020, 07:20:57 pm
content: In terms of just handling the weight, the 40x40 designed correctly will be just fine, however in the case of the PnP machine, you really want the base to be heavy and stable. Because of this the 40x040 will not be good I think. You could probably make it cheaper using square steel tubes in the area where you are. I have 'desktop' PnP that weights ~80-100kg and is on a steel table that weights over 200kg(probably did not needed that much..), but this allows me to fully utilise the machine.

author: 48X24X48X
author_rank: Frequent Contributor
timestamp: March 18, 2020, 03:25:04 am
content: Okay, thanks for the suggestion. My idea was to order them in China and ship to the pick and place company where they will ship it together. We have just enter into lock-down state here in Malaysia and all non-essential business are closed which includes those metal welder shops unfortunately.The example drawing they gave will render the total height rather short. I will add maybe 15-20 cm to make it same with standard 70 cm table.

author: 48X24X48X
author_rank: Frequent Contributor
timestamp: March 23, 2020, 05:04:04 pm
content: Quote from: mairo on March 16, 2020, 07:20:57 pmFound someone in China to do using the hollow square steel for 1/3 the price of extrusion! I'll using 40x40 profile with 2.5 mm thickness. Do you think I should go for even thicker walls and even larger square size?

author: Smallsmt
author_rank: Frequent Contributor
timestamp: March 24, 2020, 07:39:54 am
content: Add machine feet to your contruction to avoid shaking!And use closed frames to stabilize.Our table build from 80x40 profile is able to carry more than 500kg.Welded steel frame is a good solution if shipping volume is not a problem.If you add a plate on top you receive more stability too, if it got screwed on all top profiles.