Spark pool does not display miner for a long time

1. If there are two mining machines, each mining machine should have a separate mining machine account number
however, it is not necessary to register two accounts in the mine pool
because the account number of landing mine pool is different from that of landing mine machine. Multiple mine machine accounts can be opened under one mine pool account
therefore, to sum up, you need to register a pool account, and then create two mining machine accounts under this pool account, and then your two mining machines can log in to mine with different mining machine accounts
for the speed of display, the speed of local display is indeed different from that of website display, especially when the mining machine speed is slow, there will be a large error in the speed of web page. This is normal. You don't have to pay attention to it. In addition, you have g BTC, and your speed of 1.1mh is too slow. You may not be able to dig 1btc for several years or even more

2. Quantum miner was born, multi-function miner, which can automatically convert the high computing power of bitcoin Ethereum into the high income of small currency into ustd, which is jrwz666666
1, a combination of various types of professional miner,
2, high income, short payback time
3, the ustd obtained from the operation of mining machinery can be converted into legal currency for cash on major trading platforms
4, which solves a series of traditional pain points of absenteeism, such as high electricity charges, difficult trading, difficult cash flow, etc.
5, 500 ustd for each machine, direct spot trading
6, you can quickly switch out high-yield currencies according to the market.
7. You can switch out small currencies with high computing power, and the income is guaranteed
8. The mine is located at shensk hydropower station in Russia, and there is no electricity charge or custody fee.
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quantum Miner: it is a combination of the latest high-yield miner and all professional miners. Through the conversion of computing power, the ultra-high computing power of bitcoin and Ethereum miner can be converted into high-yield small currency, so as to obtain higher revenue
its magic: diversity, so that your wealth will never be monotonous
for usdt generated by mining machine operation, customers can withdraw it to the trading platform to exchange legal currency, sell it for cash on the magic cube platform, and transfer it to other accounts.

3. < UL >

this is mainly e to the 51% attack, because before some of the world's well-known mines, e to the low rate and convenient use, many miners went to those large mines to mine. As a result, the computing power of the mines soared, approaching or even exceeding 51% of the global computing power many times

bitcoin community has also raised a big discussion about 51% attack for many times,. The mine pool operators also called on the miners to move to other mines in a responsible manner, and finally 51% of the attacks were solved. Many of China's miners have moved to fish ponds

most of the new miners have joined the fish pond because they don't know about the global mine ponds, and many of the previous mines have died e to poor management

4.

The miner is better

1. the electricity charge for mining with graphics card is very high, and the performance is not high, so it can't even earn the electricity charge

2. mining is an investment more than time and speed. We should try to dig more money in the shortest time. Therefore, the professional mining machines of BTC now stress the characteristics of simple operation, small footprint and low power consumption. For example, Yingtai has developed a professional mining motherboard with a computing power of 23.488g/hash, and the proct model is btc-24gh< br />

5. Bitcoin is a kind of cryptocurrency based on decentralization, using peer-to-peer network and consensus initiative, open source, and blockchain as the underlying technology. The concept of bitcoin was first proposed by Nakamoto on November 1, 2008, and was officially born on January 3, 2009. Unlike all currencies, bitcoin does not rely on a specific currency institution to issue. It is generated by a large number of calculations based on a specific algorithm. Bitcoin economy uses a distributed database composed of many nodes in the whole P2P network to confirm and record all transactions, and uses cryptography design to ensure the security of all aspects of money circulation. The decentralized nature and algorithm of P2P can ensure that it is impossible to artificially manipulate the value of bitcoin through mass proction. The design based on cryptography can make bitcoin only be transferred or paid by the real owner. This also ensures the anonymity of money ownership and circulation transactions. The biggest difference between bitcoin and other virtual currencies is that the total amount of bitcoin is very limited and it has a strong scarcity

warm tips:
1. The above explanations are for reference only, without any suggestions
2. Before investing, it is recommended that you first understand the risks existing in the project, and clearly understand the investors, investment institutions, chain activity and other information of the project, rather than blindly investing or mistakenly entering the capital market. Investment is risky, so we should be cautious when entering the market
response time: November 30, 2020. Please refer to the official website of Ping An Bank for the latest business changes
[Ping An Bank I know] want to know more? Come and see "Ping An Bank I know" ~
https://b.pingan.com.cn/paim/iknow/index.html

6. Bitcoin futures have been restricted in China. Futures are totally different from spot. Spot is a real tradable commodity. Futures are mainly not commodities, but standardized tradable contracts based on certain popular procts such as cotton, soybean, oil, and financial assets such as stocks and bonds
however, spot trading is possible in China, but bitcoin has now restricted cash withdrawal. Arbitrage is nothing more than buying low and selling high to earn the difference. Digital currency Puyin takes 1 billion Tibetan tea assets as credit endorsement. Digital currency itself has the potential of appreciation, because Tibetan tea can appreciate.

7. Blockchain has changed a lot of instries. I know that shimai technology is an emerging technology-based comprehensive service company in the field of agricultural environmental treatment in China. It has a number of core technologies in the business fields of animal carcass collection, harmless treatment (pyrolysis and carbonization), disinfection and sterilization.

8. Brief introction: Weifang Xinghuo fertilizer Co., Ltd. was established on April 10, 2015. Its main business scope includes compound fertilizer, compound fertilizer, organic fertilizer, microbial fertilizer, water-soluble fertilizer, foliar fertilizer, organic-inorganic compound fertilizer, agricultural machinery sales (the above scope does not include dangerous chemicals, precursor chemicals, monitoring chemicals, etc.)
legal representative: Wang Yiming
time of establishment: April 10, 2015
registered capital: RMB 2 million
Instrial and commercial registration number: 370725200029083
enterprise type: limited liability company (solely owned by natural person)
Company Address: Room 501, unit 1, building 8, mining machinery garden, No.3 Gushan street, Changle County, Weifang City, Shandong Province

9. 1、 Preparation before operation
1. Labor protection and working environment
2. Training purpose and task
3. Disassembly and assembly lathe model and tool list
2. Structural analysis of lathe tailstock
1. Function of CA6140 horizontal lathe tailstock
2 Structure of CA6140 horizontal lathe tailstock
3. Disassembly and assembly of CA6140 lathe tailstock
1. Disassembly of CA6140 lathe tool rest
2. Disassembly of CA6140 lathe tailstock
3. Inspection, repair and maintenance
4. Possible faults and repair methods
5. Installation steps
4 Precautions
v. summary
references

I. preparation before operation
1. Labor protection and working environment
1.1.1 wear labor protection articles according to the needs of tools and relevant regulations before operation

1.1.2. When working with more than one person, unified command, close cooperation, action coordination and safety should be paid attention to

1.1.3. The disassembled parts should be put together as far as possible and stored according to the regulations< Objective and task of practical training

1.2.1 consolidate and strengthen the theoretical knowledge of mechanical drawing course, and lay the necessary foundation for the study of mechanical design, professional courses and other follow-up courses

1.2.2 enable students to master the mechanical assembly, parts and their connection, disassembly method, steps and precautions

1.2.3 enable students to understand and correctly use common machines, tools, measuring tools and special tools

1.2.4 be familiar with and master the common sense of safe operation, the correct placement, classification and cleaning methods of parts after disassembly, and cultivate the good habit of civilized proction

1.2.5 exercise and cultivate students' practical ability< br />
3、 Model and tool list for disassembly and assembly of lathe

Fig. 1-1 disassembly tools

Table 1-1 disassembly tool list for tailstock of CA6140 lathe

fitter basic training operation

tool list for disassembly and assembly of tailstock of CA6140 lathe

blank drawing

equipment

specification

quantity


tailstock of CA6140 lathe

CA6140 lathe Bed tailstock

1

sequence

name

specification

quantity

sequence

name

specification

quantity


< 1


< 200 mm



< 1

< 6




< 125


< 1

< 2











< br />< br / < br / < br / < br / < br / < br / < br / < br / < br / < br / < br / < br / < br / < br / < br / < br / < br / < br / < br /

< br / < br / < br / < br /
< br /
< br / < br /


< br /
< br /
< br /
< br /
< br / < br / < br >
< br /
< br / < br / < br / < br > < br /
< br /
< br / < br / < br > < br / < br / < br / < br > < br / < br > < br / < br / < br / < br / < br / < br > < br / < br / < br / < br / < br / <

1

5

slotted screw driver

100

1


10

hammer

vice


1


note: self provided common tools< The structure analysis of lathe tailstock
1. The function of CA6140 horizontal lathe tailstock
the tailstock of lathe can move longitudinally along the guide rail to adjust its position. There is a spindle driven by the handle to move along the axis of the spindle, and a center is inserted in the taper hole of the sleeve to support one end of the longer workpiece. It can also replace the drill, reamer and other tools to realize the drilling and reaming of holes

Fig. 1-1 structure of tailstock of CA6140 lathe

2. Structure of tailstock of CA6140 horizontal lathe
Fig. 2-4 is the assembly drawing of tailstock of CA6140 horizontal lathe, which is composed of several parts, such as tailstock body, tailstock base plate, fastening nut, fastening bolt, pressing plate, tailstock sleeve, screw nut, nut gland, hand wheel, screw, pressing block handle, upper pressing fast, lower pressing fast Adjust the bolts, etc<

Fig. 2-3 CA6140 lathe tailstock

Fig. 2-4 CA6140 lathe tailstock assembly diagram

III. disassembly and assembly of CA6140 lathe tailstock
1. Disassembly of CA6140 lathe tool rest
disassembly sequence of tool rest:

(1) remove the square tool rest first

(2) remove the small slide plate: loosen the lock nut and remove the handle

(3) loosen the top screw of the lead screw, screw out the lead screw and remove the screw nut

(4) remove the armature and the small sliding plate

(5) gently remove the base of the small sliding plate

(6) remove the middle sliding plate. Turn the handle to remove the lead screw

(7) remove the lead screw of the middle slide plate

Fig. 3-1-1 CA6140 lathe tool rest

Fig. 3-1-2 CA6140 lathe tailstock and tool rest schematic diagram

2. Disassembly of CA6140 lathe tailstock
tailstock disassembly sequence

(1) remove tailstock locking block and locking screw

(2) remove the hand wheel and the rear end cover

(3) gently pull out the sleeve and screw out the screw rod, Remove the nut

note: pay attention to the bearing inner ring

Fig. 3-2-1 remove the handwheel, FIG. 3-2-2 remove the screw, FIG. 3-2-3 screw and sleeve

Fig. 3-2-4 remove the handwheel, FIG. 3-2-5 sleeve and washer

Fig. 3-2-6 remove the nut, FIG. 3-2-7 remove the nut Screw and washer

Fig. 3-2-8 locking plate removed Fig. 3-2-9 tailstock bottom plate

Fig. 3-2-10 tailstock bottom Fig. 3-2-11 tailstock after removal

Fig. 3-2-12 parts after removal Fig. 3-2-13 tailstock after removal

Fig. 3-2-14 CA6140 lathe tailstock assembly Fig.

Fig. 3-2-15 breakdown diagram of CA6140 lathe tailstock

2. Put the parts into the oil pool to brush and clean

3. When washing, be sure to clean with a brush

4. Prevent the veil from sticking to the surface, which will affect the instability of transmission accuracy, and do not wash important parts with alkaline water

5. Clean the tank cover with alkaline water

4. Possible faults and their maintenance methods
1. Possible faults of tailstock and their causes and maintenance methods

① the tailstock is not concentric with the spindle

cause: it may be e to the serious wear of the tailstock or the severe wear of the machine tool guide rail, if no adjustment can be made

method: if possible, scrape down the guide rail, press the center of the main shaft to lift the tail seat cushion, so that the center height of the tail seat is consistent with the main shaft, so that there is no need to adjust every time, otherwise the tail seat can only be adjusted once

② the tailstock can not move along the bed

cause: the handle is locked or the friction between tailstock and guide rail is too large

method: open the handle, Oil the contact area between tailstock and guide rail

③ tailstock has no longitudinal feed

cause: ① screw may not be installed properly; ② screw is broken

method: ① disassemble and install; ② replace new tailstock support parts unreliable

5. Installation steps
1. Clean all parts ring assembly and grease transmission parts

2. Assemble in reverse order

3. After installation, operate it to see if it can be used

4. The clearance between wedge iron, lead screw and nut must be appropriate ring assembly

5. The slender shaft parts should be suspended or placed vertically to prevent deformation< (4) precautions
1. After understanding the structure, dismantle it first from the outside to the inside, first from the easy to the difficult, and then from the bottom to the top

2. Remove the fastening, coupling and limiting parts (top screw, pin, circlip, bushing, etc.) first

3. Before disassembly, see clearly the direction, position and arrangement of the assembly to avoid mistakes ring assembly

4. The removed parts should be placed orderly, and the key should be returned to the slot, the screw socket and the ball screw box should be installed

5. Pay attention to safety, prevent the spindle from toppling or falling down ring disassembly, and put the removed parts in the table,

6. Assemble and disassemble according to the main order, the outer part first, the inner part first, and the main part then the secondary part

7. Reasonably divide the work, and place the removed parts in order

8, The parts can not be installed reversely, etc.

v. summary
through our hands, we can supplement and question the theoretical knowledge. This is the opposite of the traditional classroom ecation. These two learning methods complement each other and can fill in the gaps and make up for some blind spots of one of them.